[ http://issues.apache.org/jira/browse/DERBY-1187?page=all ]
Mike Matrigali reassigned DERBY-1187:
-------------------------------------
Assign To: Mike Matrigali
> defragment of inplace compress pass for described dataset is not freeing up
> empty pages.
> ----------------------------------------------------------------------------------------
>
> Key: DERBY-1187
> URL: http://issues.apache.org/jira/browse/DERBY-1187
> Project: Derby
> Type: Bug
> Versions: 10.1.1.0, 10.1.1.1, 10.1.1.2, 10.1.2.0, 10.1.2.1, 10.1.2.2,
> 10.1.2.3, 10.2.0.0
> Reporter: Mike Matrigali
> Assignee: Mike Matrigali
> Priority: Minor
> Fix For: 10.2.0.0
>
> For the following script defragement pass is not freeing up the free pages:
> drop table t1;
> create table t1 (i integer primary key, j integer, c char(200));
> insert into t1 values (1, 1, 'a');
> insert into t1 (select t1.i + 1, t1.j + 1, t1.c from t1);
> insert into t1 (select t1.i + 2, t1.j + 2, t1.c from t1);
> insert into t1 (select t1.i + 4, t1.j + 4, t1.c from t1);
> insert into t1 (select t1.i + 8, t1.j + 8, t1.c from t1);
> insert into t1 (select t1.i + 16, t1.j + 16, t1.c from t1);
> insert into t1 (select t1.i + 32, t1.j + 32, t1.c from t1);
> insert into t1 (select t1.i + 64, t1.j + 64, t1.c from t1);
> insert into t1 (select t1.i + 128, t1.j + 128, t1.c from t1);
> insert into t1 (select t1.i + 256, t1.j + 256, t1.c from t1);
> insert into t1 (select t1.i + 512, t1.j + 512, t1.c from t1);
> delete from t1 where i < 512;
> select
> cast(conglomeratename as char(12)) as tabname,
> isindex,
> cast(numallocatedpages as int) as alloc,
> numfreepages,
> cast(numunfilledpages as int) as unfilled,
> pagesize,
> estimspacesaving
> from new org.apache.derby.diag.SpaceTable('T1') t order by conglomeratename;
> CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);
> select
> cast(conglomeratename as char(12)) as tabname,
> isindex,
> cast(numallocatedpages as int) as alloc,
> numfreepages,
> cast(numunfilledpages as int) as unfilled,
> pagesize,
> estimspacesaving
> from new org.apache.derby.diag.SpaceTable('T1') t order by conglomeratename;
> select
> cast(conglomeratename as char(12)) as tabname,
> isindex,
> cast(numallocatedpages as int) as alloc,
> numfreepages,
> cast(numunfilledpages as int) as unfilled,
> pagesize,
> estimspacesaving
> from new org.apache.derby.diag.SpaceTable('T1') t order by conglomeratename;
> Here is example output from a run on the trunk:
> ij> drop table t1;
> 0 rows inserted/updated/deleted
> ij> create table t1 (i integer primary key, j integer, c char(200));
> 0 rows inserted/updated/deleted
> ij> insert into t1 values (1, 1, 'a');
> 1 row inserted/updated/deleted
> ij> insert into t1 (select t1.i + 1, t1.j + 1, t1.c from t1);
> 1 row inserted/updated/deleted
> ij> insert into t1 (select t1.i + 2, t1.j + 2, t1.c from t1);
> 2 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 4, t1.j + 4, t1.c from t1);
> 4 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 8, t1.j + 8, t1.c from t1);
> 8 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 16, t1.j + 16, t1.c from t1);
> 16 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 32, t1.j + 32, t1.c from t1);
> 32 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 64, t1.j + 64, t1.c from t1);
> 64 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 128, t1.j + 128, t1.c from t1);
> 128 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 256, t1.j + 256, t1.c from t1);
> 256 rows inserted/updated/deleted
> ij> insert into t1 (select t1.i + 512, t1.j + 512, t1.c from t1);
> 512 rows inserted/updated/deleted
> ij> delete from t1 where i < 512;
> 511 rows inserted/updated/deleted
> ij> select
> cast(conglomeratename as char(12)) as tabname,
> isindex,
> cast(numallocatedpages as int) as alloc,
> numfreepages,
> cast(numunfilledpages as int) as unfilled,
> pagesize,
> estimspacesaving
> from new org.apache.derby.diag.SpaceTable('T1') t order by conglomeratename;
> TABNAME |ISIND&|ALLOC |NUMFREEPAGES |UNFILLED |PAGESIZE
> |EST
> IMSPACESAVING
> --------------------------------------------------------------------------------
> -----------------
> SQL060406034|1 |7 |0 |0 |4096 |0
> T1 |0 |60 |9 |0 |4096
> |368
> 64
> 2 rows selected
> ij> CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);
> 0 rows inserted/updated/deleted
> ij> select
> cast(conglomeratename as char(12)) as tabname,
> isindex,
> cast(numallocatedpages as int) as alloc,
> numfreepages,
> cast(numunfilledpages as int) as unfilled,
> pagesize,
> estimspacesaving
> from new org.apache.derby.diag.SpaceTable('T1') t order by conglomeratename;
> TABNAME |ISIND&|ALLOC |NUMFREEPAGES |UNFILLED |PAGESIZE
> |EST
> IMSPACESAVING
> --------------------------------------------------------------------------------
> -----------------
> SQL060406034|1 |7 |0 |1 |4096 |0
> T1 |0 |69 |0 |0 |4096 |0
> 2 rows selected
> ij>
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
http://www.atlassian.com/software/jira
