A partition-by-growth (PBG) table space -- as the name implies -- is one that is partitioned as needed to accommodate a table's growth; so, if in creating a table space (or altering an existing table space) one specifies a DSSIZE (data set size) of 2G (2 gigabytes) then upon the table reaching 2 GB in size DB2 will add a second partition to the . These packages will be automatically rebound (by default) when the associated programs are next executed, or you can rebind them explicitly. As a result, I have a lot of partitioned indexes on the tables inside those PBR tablespaces. I think you're talking about a partitioned table. The non-disruptive process described above for converting simple and segmented table spaces to PBG universal table spaces (ALTER with MAXPARTITIONS, followed by online REORG) is available, as I mentioned, only for single-table simple and segmented table spaces. Robert, thanks for all the information. I used the Db2 Admin Tool to try and specify redirected recovery. If there's a mismatch for any of those table space definition specifications, the redirected recovery operation will fail with an error.Robert. Later, I saw the last partition of the table space went into REORP status. Big questions is: Conversion requires base table REORG only? Hi Robert, No problem. In this case, AUX YES is in effect. If the latter (converting LOB table space to UTS), that cannot be done because a LOB table space and a universal table space are two different table space types. That means the table space will be placed in AREOR status (which does not impact data accessibility) and information about the change will be placed in the new (with DB2 10 NFM) SYSPENDINGDDL table in the DB2 catalog. Multiple tables in one tablespace. Max of 64 GB can be stored for every table. And, a DSSIZE change no longer requires an online REORG to become effective - it is an immediate change (unless the change decreases the DSSIZE value).You can find more information about RPN table spaces in the IBM redbook titled, "IBM DB2 12 for z/OS Technical Overview." How to start building lithium-ion battery charger? When an online REORG is run to materialize a pending DDL change, packages dependent on the object affected by the pending DDL change are invalidated and the only way froward is a rebind of the package (not a REBIND SWITCH) -- either an explicit rebind or the automatic rebind that will otherwise occur when the invalidated package is next executed.Robert. The CREATE TABLESPACE statement defines a segmented (non-UTS), partitioned (non-UTS), or universal (UTS) table space at the current server. It has an aux table TAUXLOB1 in an AUX TS TSAUX1 with 160 data sets 4GB. I would not have expected this result. Thank you for the prompt response!This is not a data replication scenario. This Online Reorg AUX NO would be part of this UTS conversion for the Simple TS. A table-controlled partitioned table space can be converted in a non-disruptive fashion to universal partition-by-range, but this is not true for a traditional segmented table space (I say "traditional" because universal table spaces are segmented as well as partitioned). Each LOB column must have an associated auxiliary table in a LOB table space. REORG base TS only (AUX NO), or must one REORG TS and LOBs (AUX YES) to reset AVREO*? What is the best way to move multi-tables in a single tablespace to UTS. There is no non-partitioned secondary indexes. Asking for help, clarification, or responding to other answers. Thanks a lot. It is great help if you can clarify this for me? Every table is stored in table space. To explicitly create a table space: Issue a CREATE TABLESPACE statement and specify the type of table space to create and other attributes. If you want to control those names, you can do that in this way: if the table started out with n partitions, well before partition n fills up and causes Db2 to dynamically add partition n+1, add that partition yourself via ALTER TABLE ADD PARTITION. So planning to convert to universal tablespace partition.by.growth. This is the blog of Robert Catterall, an IBM Db2 for z/OS specialist. A page can contain data from multiple tables . The same table space remained in RW when I performed the same change in another subsystem.What could be the possible cause for this? It is possible that in the index-controlled partitioned table space, some rows in the last partition had a partitioning key value greater than the partition's limit key value (in some cases, the limit key value of an index-controlled partitioned table space's last partition is not strictly enforced -- a row with a partitioning key value greater than the limit key value of the last partition is simply placed in the last partition, versus being rejected in insert); however, my expectation would be that on being converted to table-controlled partitioning, the table space's last partition would have its limit key value changed by DB2 to its highest possible value, so that any row that had technically not belonged in that partition (due to having a partitioning key value larger than the last partition's limit key value) would be OK in the new table-controlled partitioned table space (the limit key value is strictly enforced for inserts into a table-controlled partitioned table space). Cut the release versions from file in linux. It is two 512K BLOB columns (Graphic images actually). What DB2 for z/OS version are we talking about here, and is it in conversion or new-function mode? How to get CREATE TABLE Statement from existing table in db2? When you create or alter a table space, the clauses that you specify in a CREATE TABLESPACE or ALTER TABLESPACE statement determine the type of table space. Why not just convert it to a universal partition-by-range table space? Hello, Indra.You can't specify SEGSIZE in an ALTER TABLESPACE statement for a simple table space. You can also explicitly define table spaces by issuing CREATE TABLESPACE statements. Yes, it's a simple TS that holds a table with a LOB column defined in an AUX table which exists into a LOB TS (with 160 data sets 4GB each). It cannot be accomplished via ALTER and REORG.What some organizations do to mitigate the data availability impact of a change requiring DROP and re-create (suppose you want to change table TAB_A from PBG to PBR):1) Create a PBR table, TAB_B, that is logically equivalent to TAB_A (same columns, same order, etc. For instructions for creating the supported types, see Creating partition-by-range table spaces and Creating partition-by-growth table spaces. When a range-partitioned table space uses relative page numbering, new and useful options concerning DSSIZE are available. Additional partitions were added. Then any subsequent DELETEs fail with -100 not found as they have the actual value that was assigned to the Identity on the original table. Our shop is 24x7x365 so that would cause us issues with availability.Thanks in advance,Steve, Hello, Steve. Some of the benefits of universal . Very sorry about that. Are there any updates to the above scenario with DB2 11? Hi Robert,Is there a way to identify all the dependent packages that are to be Rebinded for a classic partitioned tablespace which is going to be converted into a UTS ? Hi Robert,The blog's content is excellent for learners !! The resulting PBG table space will maintain the relationship with the existing LOB table space. Thanks Robert. Hi Robert,What makes a DBA prefer a PBG over a PBR ?Is it true that if mainly working at partition level (i.e. If the simple table space holds several tables, and the Db2 for z/OS environment is V13, or V12 with function level 508 or higher activated, you can convert the one multi-table simple table space to multiple single-table PBG table spaces using the process described in this blog entry: http://robertsdb2blog.blogspot.com/2022/05/db2-for-zos-online-path-from-multi.html.Robert. You can convert a traditional segmented table space to universal partition-by-growth in a non-disruptive way (starting with DB2 10 in new-function mode), but if you want to make the traditional segmented table space a partition-by-range universal table space, you will have to go the unload/drop/re-create/re-load route.Robert. I am now testing with FCIC Consistent instead of unloading directly from TAB_A. Yes, but it will be a somewhat involved process. Invocation. Take universal table spaces, for example. When we REORG the tablespaces after the ALTER to materialize to UTS, all the dependent packages will become invalid and these need a Rebind. If 99.9% of the data is in one of the table's partitions, is that partition the "last" partition of a table partitioned by a continuously-ascending value such as date? That tells me the table space in question is already universal, because LOB in-lining is only possible for a table that is in a universal table space.Robert. You should be fine reorganizing just the base table space.Robert, Hi Robert,If we create LOB tablespace explicitly to maintain shop standards along with base tablespace as PBG, does it create another LOB object automatically when the first one fills up and if yes , does it follow the same standard as we defined for part 1. Is this still the way to convert from PBG to PBR?I am dealing with an Identity column which throws a wrench in the REDO SQL as it generates INSERTs with DEFAULT value for it. A partition-by-range table space (PBR) is a universal table space (UTS) that has partitions based on ranges of data values. With DB2 11 in new-function mode, alteration of partition limit key values is treated as a pending DDL change, and so can be accomplished in an online fashion (issue ALTER, then run online REORG to materialize the change). It holds data pages for a single table, and has segmented space management capabilities within each partition. SEGSIZE for the new universal PBG table space will default to 32 when you convert from a simple table space.Robert, Thank you very much for spending time and explaining, despite your busy schedule. Universal table spaces (UTS)combine the benefits of data partitions and segmented organization. This cannot be done with an ALTER. That easy "ALTER and REORG" path to PBG only works for a simple table space or a traditional segmented table space.Robert. DB2 for z/OS: the Functional Advantages of Native DB2 for z/OS: Getting to Universal Table Spaces, "Currently committed" locking behavior (DB2 10 -- a means of reducing lock contention), Pending DDL (DB2 10 -- more on this below), XML multi-versioning (DB2 10 -- required for a number of XML-related enhancements). Is it normal for spokes to poke through the rim this much? In the section of the online Db2 for z/OS documentation that I referenced (https://www.ibm.com/docs/en/db2-for-zos/12?topic=recover-running-redirected-recovery), you'll see a "Table 1." It looks like REBIND PACKAGE command with EXPLAIN(ONLY) will create the EXPLAIN info for the package but this accesspath may be different than the the accesspath that is currently in use for a given package. The CREATE TABLESPACE statement defines a new table space within the database, . Could you please let me know if you have better way of doing above task.ThanksKhalinder, Sorry about the delayed response. Hi Robert, I am not clear about PBR. Simple table spaces They are deprecated as of V9 and can no longer be created, but are still supported by Db2. I thought I could split up the REORG jobs to reorg by multiple partitions in groups (say 8 parts per sequential job). My concern is about if we can run an online Reorg with AUX NO trying to improve performance/elapsed time with it? Looking for your guidance: how do we save this accesspath before the conversion and eventual fallback to this accesspath if there is a need. Keep an eye out for a very important Db2 for z/OS announcement coming later this year.Question 2: before I answer this one, could you let me know if this is a data replication scenario, and if so, if both the source and the target are Db2 for z/OS systems?Robert. Hello Robert, What's the best way to convert a simple LOB TSBS1( it has 1 data set) into a UTS ? with a maximum of 24 partitions for table space. I figured out how to handle it before you got the chance to answer the question. Depending on the keywords specified, the result is a partition-by-range, partition-by-growth, partitioned (non-UTS) or segmented (non-UTS) table space. The non-disruptive process for converting traditional range-partitioned table spaces to PBR universal table spaces (ALTER with SEGSIZE, followed by online REORG) is available, as I mentioned, only for table-controlled partitioned table spaces. Your question has me a little confused. Fernando, are you asking about converting a simple table space, which holds a table that has a LOB column, to a universal table space, or are you asking about converting the LOB table space itself to a universal table space? I was hoping I could do the REORGs by partition. If your data for a table does not fit entirely within a data page, you can define one or more columns as LOB columns. In this blog post I want to go over the incentives for undertaking a conversion to universal table spaces, highlight the important way in which DB2 10 eased the conversion process, and raise some matters one should consider in the course of effecting table space conversions. Should I go with BIND COPY EXPLAIN(ONLY) to a Dummy Collection. As I recall, it works this way: if Db2 dynamically adds a partition to a PBG table space, and the table in the table space has a LOB column, Db2 will implicitly create the LOB table space and auxiliary table that will be associated with the new partition of the PBG table space. To convert a simple table space that holds ONE table to universal partition-by-growth, you alter the table space with a MAXPARTITIONS specification and then online-REORG the table space to accomplish the actual transformation to universal PBG. You are always very helpful. You're right in that REBUILD INDEX (which you would execute following a CREATE INDEX with DEFER YES), for a unique index, even with SHRLEVEL CHANGE, will not allow changes to table data (INSERT, DELETE, UPDATE of a column of the index) that would result in index changes, because the index can maintain uniqueness of the key only when the index is not changed during the rebuild.Could you pull off this change while having only a very brief period of no-data-change activity for the underlying table? No can do, Fernando. That is unfortunate but like you said there are ways around it. No. The CREATE LOB TABLESPACE statement defines a large object (LOB) table space at the current server. If the table space for the base table is partitioned, an associated auxiliary table in a LOB table . Indra. If you do not explicitly specify a table space, Db2 implicitly creates the table space with a derived name. The partition Tablespace XYZ123 has the partition table created in it.Now our task is to convert the partition table to non partition table in Universal Tablespace.Our approach is unload/drop/create/re-load route. Or can it be done by just one ALTER MAXPARTITIONS statement? Making statements based on opinion; back them up with references or personal experience. Hello Robert, Thank you very much for your suggestions. And in which way I can refer to different tablespaces in order to insert data in the right tablespace based on my date field to switch? Partition-by-range table spaces can use absolute or relative page numbering. I saw something regarding DB2 v12 f-Lvl 508. For this, have altered a tablespace by altering its index from NOT CLUSTER, COMMIT and then back to CLUSTER. , let the database manager determine an appropriate initial size for the table space. Specify the table space type to create. Again, rather involved, but not impossible - this procedure has been used by multiple organizations to effect changes to Db2 objects that cannot be effected via ALTER.Robert, Robert, Thank you for the quick reply. That could be done with an ALTER and an online REORG.Robert. "Robert, Hi Robert,Thanks for all the great info.I've been converting many of our non-UTS partitioned tablespaces to UTS PBR. Very well written and really helpful. table space depends on the keywords specified. Real appreciate, Robert.Regards,Indra. Hi Robert, Thank you for the great explanation. A universal table space is a table space that is both segmented and partitioned. Hi Robert, really enjoy your blogs. Besides a consistent FlashCopy image copy, you might also consider the option of doing a redirected recovery of the table space to a desired point-in-time. Sorry about the delayed response.You can change the DSSIZE to a larger value (e.g., 128G) via an ALTER TABLESPACE statement, and in a DB2 10 NFM system this will not impact data availability. My mistake, they are not inline. We would be converting to UTS. Thanks very much for taking time to answer the question. Anyway, REBIND SWITCH is not a solution for dealing with an invalidated package. Find centralized, trusted content and collaborate around the technologies you use most. Use the device /dev/rhdisk0 for 10 000 4K pages on each database partition. For an index-controlled partitioned table space, you'll first need to accomplish the conversion to table-controlled partitioning. What is the page size for the table space? Universal (UTS) table spaces use a combination of partitioned and segmented table space schemes. The CREATE TABLESPACE statement defines a table space at the current server. What is the PIECESIZE for any non-partitioned secondary indexes defined on the table space?Robert. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, DB2 create table and insert in tablespace, How to keep your new tool from gathering dust, Chatting with Apple at WWDC: Macros in Swift and the new visionOS, We are graduating the updated button styling for vote arrows, Statement from SO: June 5, 2023 Moderator Action. . That's a situation that might have you leaning towards replacing the partitioned index with a non-partitioned index.Robert. Is it common practice to accept an applied mathematics manuscript based on only one positive report? The numerical solution cannot be obtained by solving the Trigonometric functions equation under known conditions? If I have to issue ALTER statement, can I alter the DSIZE when the dataset is in use? Thank you. That would make the amount of resources needed for sorts for each REORG less than one big REORG. However, IBM stated that since the DSSIZE is specified at the TS level I must do one REORG job for the entire tablespace. My question: how do we save this accesspath before the conversion and eventual fallback to this accesspath if there is a need. We are planning to convert tablespaces to UTS. !I have converted a lot of table spaces to UTS PBG and PBR. These is still no way to convert a range-partitioned table space to a PBG table space by way of an ALTER and an online REORG. Universal table spaces offer the following advantages, when compared to the deprecated non-UTS table space types: A choice of partitioning methods: Is what IBM stated correct? detect if zone transfer with dig succeed or not via return code. Hi Robert, Sorry for not clear enough for my question. Advantages of universal table spaces Universal table spaces (UTS)combine the benefits of data partitions and segmented organization. This Rebind might change the accesspath. The tablespace is a universal partitioned by range one (after converting the index based partitioning table to table partitioning and SEGSIZE 64 instead of 0. If that adjustment of the last partition's limit key value to its highest possible value occurred when you converted the table space to use table-controlled partitioning, the partition shouldn't have gone into REORP status (i.e., "hard" REORG-pending status). That would require unload and load of the data into the mirror table, and then data change propagation (perhaps via a data replication tool, perhaps via a log analysis tool) to get the two tables (original and mirror) very close to in-sync, then a brief no-update period to make the synchronization 100%, then RENAME of the "original" table and RENAME of the mirror table (to give it the name that had belonged to the "original" table), followed by REBIND of the packages invalidated by the RENAME of the former "original" table. (assuming SEGSIZE is defaulted to 32 or something). Then I have TBS_x in which data in predefined range will be add, TBS_x+1 for the next range and so on.. My question is: I have to create the same table TABLE_IN_TBS in the different tablespaces? Error in UCCSD(T) Calculation in PySCF for S atom? DSSIZE 64G Segment size 32. Does the policy change for AI-generated content affect users who (want to) DB2 Child Table Not Working - Create Table, Create a temporary table in temporary tablespace db2, create tablespace problem in db2 HADR environment, DB2 - Move table from one to other tablespace. This Rebind may change the accesspath. Specify a database partition-specific device with 40 000 4K pages for each database partition. A REBIND PACKAGE command with the EXPLAIN(ONLY) option will not actually rebind the package - it will just provide EXPLAIN information for the package.If you need to restore the access path for the package, you can do that with OPTHINT, or with the BIND QUERY command and the SYSIBM.SYSQUERYPLAN catalog table (see https://www.ibm.com/support/knowledgecenter/SSEPEK_12.0.0/comref/src/tpc/db2z_cmd_bindquery.html).Robert. That's most easily done via issuance of an ALTER INDEX statement with NOT CLUSTER for an index-controlled partitioned table space's partitioning index (as described in. Do I need to alter SEGSIZE to some value and first and then do ALTER MAXPARTITIONS? The application can still read data while reorg'ing. Page size is 32K. Is there any confirmed counterexample to causality in nature? Invocation This statement can be embedded in an application program or issued interactively. Sorry about the delayed response.I recommend contacting the IBM Support Center regarding this issue. With the following syntax? Hello Robert,Thanks for the great work.Question : Can I convert segmented TS to UTS PBR, than dropping/ recreating the tablespaces ? The intent of REBIND SWITCH (and of plan management, through which the previous instance of a package is retained when a new instance is generated via REBIND) is to provide a means of quickly going back to the previous instance of a package when a new instance, generated via REBIND, delivers less-good performance because of an access path change. For more information, see Creation of table spaces. Glad that the blog entry was helpful.Robert, Hi Robert,We are planning to convert partition table space (say XYZ123) to Universal Tablespace (with Partition by growt). or UTS conversion requires full REORG AUX(YES)? How to use efficient index seek to find the latest row filtered on a small subset of rows? If so (and assuming that you have not yet reached the maximum number of partitions for a table, which is 4096 unless DSSIZE is quire large), could that situation have been avoided by periodically (e.g., every week or month or whatever) issuing an ALTER TABLE statement with the ADD PARTITION clause?In any case, to get from non-universal range-partitioned to universal partition-by-growth, I believe that you will in fact need to go the unload/drop/re-create/re-load route. CREATE LARGE TABLESPACE LARGEDATA INCREASESIZE 10 PERCENT MAXSIZE 512 M; For one thing, DSSIZE for an RPN table space can be specified at the partition level. Basically, you'd need to create a mirror of the table, with the desired non-partitioned index. I issued an ALTER TABLESPACE xxx DSSIZE 128G and it resolved the issue of 64 G limitation and without impacting data availability. You can let Db2 create and manage the table space for you by issuing a CREATE TABLE statement that does not specify an existing table space. A DB2 table space is a set of volumes on disks that hold the data sets in which tables are actually stored. I did reorg to remove AREOR status afterwards. However can you please explain how you can switch to a previous version of a package when that version has been marked as Invalid by the reorg to materialize the UTS change.I've tried this and as expected it doesn't work, it fails with a DSNT269I message - Previous version of the package is invalid.Thanks, Mark, Somehow, I overlooked this comment. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. There are 3 partitions which were partitioned by range. We have a need to convert a non-UTS partitioned table to UTS PBG. The CREATE TABLESPACE statement defines a table space at the current server. Hello, Derek.As an IBMer myself, I can state definitively that, yes, what IBM told you is correct: to change the table space's DSSIZE, you will have to issue the ALTER TABLESPACE statement (to specify the new DSSIZE) and then execute an online REORG of the entire table space to put the change into effect.That changes with DB2 12 for z/OS, which became generally available a few months ago. In other words, an auxiliary table holding LOB data can exist in a LOB table space and only in a LOB table space, and a LOB table space by definition cannot be a universal table space.If you have a simple table space that holds a table that has a LOB column, and if that table is the only table in the simple table space, you can convert the simple table space to a universal PBG table space by altering the table space with a MAXPARTITIONS value and then executing an online REORG of the table space. Just issue a SELECT against the catalog table SYSIBM.SYSPACKDEP. I'd also give consideration to adding partitions to the table.Robert. For example, if you were converting table space TS123 in database DB456 from classic partitioned to range-partitioned universal via ALTER TABLESPACE (with SEGSIZE) and online REORG (in a DB2 10 NFM or later environment), you could identify dependent packages ahead of time with a query like this one:SELECT DCOLLID, DNAME, DCONTOKENFROM SYSIBM.SYSPACKDEPWHERE BNAME = 'TS123'AND BQUALIFIER = 'DB456'AND BTYPE = 'R'ORDER BY 1,2,3;Robert. In that table, you'll see that for object type "Table space," one of the "Characteristics that must match in the source and target" is "Type and organization: partition-by-growth (PBG), partition-by-range (PBR), partition-by-range with relative page numbering (PBR RPN), LOB, or XML." DB2 9 introduces a new type of table space: a universal table space. Thanks Robert, sorry for this confusion. CREATE TABLESPACE TEST01TS IN TEST01DB USING STOGROUP SG1 DSSIZE 2G MAXPARTITIONS 24 LOCKSIZE ANY SEGSIZE 4 . Hey, Stefan.If you are doing a redirected recovery of a PBG table space, the target table space (the one that will be a copy of the source table space, generated by way of the redirected recovery action) must also be a PBG table space. Robert, I am converting a tablespace from LARGE (DSSIZE 4 GB) to DSSIZE 16 GB. Similarly, if the index controlled partitioned table space did not have any rows in the last partition with a partitioning key value larger than the partition's limit key value, the last partition should not have gone into REORP status.Yours is a strange result, and I can't tell you why it occurred. SQL (DB2) Creating table by selecting from other table. Db2supports several different types of table spaces. my DBA created three different tablespaces in DB2 in order to store the same table (TABLE_IN_TBS), switching on a date field. "Should I be able to use redirected recovery when the source tablespace is PBG and the target one PBR? For a given package that will be invalidated as a result of materializing the pending DDL change (i.e., the change to a universal type for a table space), prior to the REORG you can extract access path information by rebinding the package with EXPLAIN(ONLY) specified. And, allowable DSSIZE specifications no longer depend on the table space's page size and the number of the partitions associated with the table space. If you can wait to get from function level 503, where you are now, to function level 508, do that.If you must accomplish the movement of the tables in your current environment, the process will be unload, drop, re-create as a table in a universal table space, then re-load the data.Robert. Well done, Robert. I would need to calculate space and determine if we have those resources. An RPN range-partitioned table space can be created, or an existing range-partitioned table space can be changed to RPN via an ALTER TABLESPACE with PAGENUM RELATIVE, followed by an online REORG of the entire table space. Where can one find the aluminum anode rod that replaces a magnesium anode rod? In a DB2 12 environment, range-partitioned table spaces (universal PBR or "classic" partitioned - the latter term referring to a non-universal table space for which table-controlled partitioning is in effect) can utilize a new physical database design option called relative page numbering, or RPN. That document can be downloaded from this URL: http://www.redbooks.ibm.com/abstracts/sg248383.html?Open.Robert, A clarification: an RPN table space must also be a universal table space. In "Forrest Gump", why did Jenny do this thing in this scene? This resulted in message:"The target table space differs from the source table space: Tablespace type mismatch. ), and create indexes as needed on TAB_B.2) Unload from TAB_A, and load TAB_B.3) Use a log analysis tool (available from IBM and other vendors) to extract from the DB2 log all changes made to TAB_A since it was unloaded to populate TAB_B, and "replay" those changes for TAB_B, to bring TAB_B data up to currency with respect to TAB_A (TAB_A must be in read-only mode at this time, so that data in TAB_A won't be changed while data in TAB_B is being brought to currency).4) Rename TAB_A to TAB_X, and rename TAB_B to TAB_A.5) Rebind packages made invalid by the above RENAME TABLE action.Robert. Hello Robert,Thanks for this Blog! You made it easy to understand. But recently, I found an issue during the conversion and was not able to figure it out.Could you help me?I have to convert a Index controlled Classic partitioned table space to UTS PBR. In your most recent comment, you noted (correctly) that REBIND PACKAGE with EXPLAIN(ONLY) will cause a new EXPLAIN to be done for statements in the package, and that access plan information generated by that new EXPLAIN could differ from the actual access plan used for the package's statements. Yes, this can be easily done. The REORGs are done with SHRLEVEL REFERENCE and no updates will occur during the maintenance. Perhaps the IBM Support Center can figure out what happened.Robert. what is the way to covert UTS PBG and PBR and vice versa ? Thanks Again for your inputs. I have 64 partitions in the table and the total tablespace size is over 200 GB. This statement can be embedded in an application program or issued interactively. Is there a way to convert those partitioned indexes to non-partitioned, other than drop/create? how about one more twist: Convert LARGE (1000+ parts) table containing LOB data (inline with overflow) to UTS. We are still in the 1st partition, then ran into 'partition is full' error. The name is derived based on the name of the table that is being created. Here is a link to documentation on redirected recovery: https://www.ibm.com/docs/en/db2-for-zos/12?topic=recover-running-redirected-recovery.Robert. If God is perfect, do we live in the best of all possible worlds? Db2 creates a partition-by-growth or partition-by-range table space. And, different partitions of a given RPN table space can have different DSSIZE specifications. rev2023.6.12.43490. That said, if you have a classic range-partitioned table space (in other words, a non-universal table space that uses table-based, as opposed to index-based, range partitioning) then you can alter the table space with a SEGSIZE value (to get it to universal partition-by-range) and alter it again with PAGENUM RELATIVE, and the same online REORG that converts the table space from classic partitioned to universal PBR will also convert the table space to use relative page numbering.Robert. You then mentioned the possibility of issuing an EXPLAIN statement with the PACKAGE keyword, and I simply overlooked that. That being the case, on the off chance that a package rebind operation leads to performance degradation (performance will typically be the same or better following a package rebind), you can very quickly switch back to the previous instance of a package via a REBIND PACKAGE command with the SWITCH(PREVIOUS) option. Often, there is a bit of a time lag between the introduction of a DB2 for z/OS feature and the widespread adoption of the new technology. Thanks! Mathematica is unable to solve using methods available to solve, Manga where the main character is kicked out of a country and the "spirits" leave too. Thanks! Table spaces are divided into equal-sized units, called pages.Each page is read from disk to the assigned buffer pool, or written from the buffer pool to disc, in a single operation. Each UTS table space always contains only a single table. table space depends on the keywords specified. For a simple or segmented table space containing multiple tables, you'd have to either go the unload/drop/create/re-load route (with one PBG universal table space created for each table in the multi-table simple or segmented table space), or wait and see if a future release of DB2 provides a non-disruptive universal table space conversion process for multi-table simple and segmented table spaces (this is a known requirement). Should I use EXPLAIN PACKAGE COPY CURRENT to generate the EXPLAIN output that is currently in use and I can fall back to this EXPLAIN output if there is any issue. First, it's the only way in which you can leverage the benefits of partition-by-growth table spaces, one of two varieties of universal table space (the other being partition-by-range). The partitioning method and segmented organization are among the main characteristics that define the table space type. The change will be treated as a pending DDL change (pending DDL is a feature that was introduced with DB2 10 for z/OS). To learn more, see our tips on writing great answers. A film where a guy has to convince the robot shes okay. Utilities like REORG PART) then PBR tablespaces are preferable ? You appear to be asking about conversion of a non-universal table space to universal, but you indicate that the table space contains a table with in-lined LOB data. It is not segmented, so not UTS. Connect and share knowledge within a single location that is structured and easy to search. The opinions expressed herein are the author's, and should not be construed as reflecting official positions of the IBM Corporation. Materialization of the change to universal table space from non-universal (via online REORG after the appropriate ALTER statement) will invalidate packages that depend on a given table space. I have a question about converting simple(SEGSIZE=0) tablespaces to PBG. Thanks in advance. I was simply generating REDO SQL in order to apply any update activity since the unload of TAB_A. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Is the Sun hotter today, in terms of absolute temperature (i.e., NOT total luminosity), than it was in the distant past? The need for a better way to change a PBG table space to PBR has been understood by the IBM Db2 for z/OS development organization as a key requirement. FL 504Depending on the keywords specified, the result is a partition-by-range or partition-by-growth table space. . As I see it, their are two main reasons to convert non-universal table spaces to the universal kind. How Can I Put A Game Gracefully On Hiatus In The Middle Of The Plot? Non-UTS table spaces for base tables are deprecated and likely to be unsupported in the future. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. When we REORG the tablespaces after the ALTER to materialize to UTS, all the dependent packages becomes invalid and these need a Rebind. with LOB data the data capacity of a table space can far exceed 128 TB. Thanks in advance. If queries tend not to reference the partitioning key in predicates, the partitioned index may not be helping query performance in any significant way, because in that case Db2 can't determine which partitions of the index could contain entries related to result set rows. Check it out and see if it answers your question.Robert. If I have partitions defined as PBR and 64G DSIZE, but when the particular ranged partition is almost filling 64G size, should I issue alter DSIZE statement to before it reaches 64G or it will extent automatically since it SMS managed data set. It is defined like this: Thanks for contributing an answer to Stack Overflow! You do not have to BIND COPY into a dummy collection. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Apologies for the delayed response.The way to get from UTS PBG to PBR and vice versa is unload/DROP/re-create/re-load. Dssize 128G and it resolved the issue of 64 GB can be embedded in an ALTER TABLESPACE DSSIZE... From UTS PBG and PBR and vice versa the simple TS succeed or not via return code anyway rebind! Only works for a simple LOB TSBS1 ( it has 1 data set into... Are ways around it REORG with AUX NO trying to improve performance/elapsed time with it improve performance/elapsed with... For your suggestions, have altered a TABLESPACE from LARGE ( DSSIZE 4 )... The unload of TAB_A defined on the table space ( UTS ) that has partitions based on opinion ; them. Change in another subsystem.What could be the possible cause for this see it! Change in another subsystem.What could be the possible cause for this, have altered TABLESPACE. Issues with availability.Thanks in advance, Steve common practice to accept an applied mathematics manuscript based on ranges of partitions... Learn more, see Creation of table space schemes with AUX NO ), or you clarify. Spaces can use absolute or relative page numbering, new and useful options concerning DSSIZE are available, SWITCH... Table space: a universal partition-by-range table space about a partitioned table to UTS in a table. Since the unload of TAB_A MAXPARTITIONS statement universal ( UTS ) combine the benefits of data.! To DSSIZE 16 GB Thank you for the table space at the current server the 1st partition, ran! See it, their are two main reasons to convert those partitioned indexes on the tables inside those tablespaces!, an associated auxiliary table in a LOB table a lot of partitioned indexes to,. A magnesium anode rod that has partitions based on ranges of data partitions and segmented organization TABLESPACE...: //www.ibm.com/docs/en/db2-for-zos/12? topic=recover-running-redirected-recovery.Robert me know if you have better way of doing above task.ThanksKhalinder, Sorry the! Of V9 and can NO longer be created, but it will be automatically rebound ( by )! Doing above task.ThanksKhalinder, Sorry about the delayed response.I recommend contacting the IBM Corporation how about one more twist convert., DB2 implicitly creates the table space uses relative page numbering best way to covert UTS and! And it resolved the issue of 64 GB can be embedded in an application or... Sequential job ) in this scene tables are deprecated as of V9 and NO! For more information, see our tips on writing great answers can it be done with an error.Robert spaces are! Introduces a new type of table spaces that since the DSSIZE is specified at the current server response. 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