Here are some very useful utility SQLs that will allow you to understand your space usage, system and other useful stuff:
DB2 Space Usage & Status
1: -- to find tablespace status, type , usage run following SQL
2: select substr(tablespace_name,1,20) Tablespace_name,
3: case t.TBSPACETYPE
4: when 'S' then 'System Managed'
5: when 'D' then 'Database managed'
6: end as TBSManaged,
7: (used_pages/total_pages ) * 100 usedPCT,
8: s.total_pages Total_pages,
9: s.used_pages Used_pages,
10: (s.total_pages - s.USABLE_PAGES ) Overhead_pgs,
11: s.NUM_CONTAINERS No_of_containers,
12: s.free_pages Free_pages,
13: case t.DATATYPE
14: when 'A' then ' ALL typ perm '
15: when 'L' then ' Large '
16: when 'T' then ' System Temp'
17: when 'U' then ' User Temp '
18: end as TBStype,
19: case s.TABLESPACE_STATE
20: when 0 then ' Normal '
21: when 1 then ' Quiesced: SHARE '
22: when 2 then ' Quiesced: UPDATE '
23: when 4 then ' Quiesced: EXCLUSIVE '
24: when 8 then ' Load pending '
25: when 16 then ' Delete pending '
26: when 32 then ' Backup pending '
27: when 64 then ' Roll forward in progress '
28: when 128 then ' Roll forward pending '
29: when 256 then ' Restore pending '
30: when 512 then ' Disable pending '
31: when 1024 then ' Reorg in progress '
32: when 2048 then ' Backup in progress '
33: when 4096 then ' Storage must be defined '
34: when 8192 then ' Restore in progress '
35: when 16384 then ' Offline and not accessible '
36: when 32768 then ' Drop pending '
37: when 33554432 then ' Storage may be defined '
38: when 67108864 then ' Storage Definition is in (final) state '
39: when 134217728 then ' Storage Definition was changed prior to rollforward '
40: when 268435456 then ' DMS rebalancer is active '
41: when 536870912 then ' TBS deletion in progress '
42: when 1073741824 then ' TBS creation in progress ' end TABLESPACE_STATE
43: from table(snapshot_tbs_cfg(' ',-1)) as s, sysibm.systablespaces t where s.tablespace_name = t.tbspace ;
DB2 Unused Space
1: -- GETTING WASTED SPACE
2: select TBSPACE, ((80 - usedPCT) * total_pages/100)*4/1000 SPACE_WASTED
3: FROM
4: ( select substr(tablespace_name,1,20) TBSPACE,
5: total_pages,
6: used_pages,
7: free_pages,
8: (used_pages*100/total_pages ) usedPCT
9: from table(snapshot_tbs_cfg(' ',-1)) as tbs )
10: AS TABLE_SPACE
11: WHERE usedPCT < 60
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