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  3. August 2012

Re: Disk Space Reports

wrote on Mon, 06 Aug 2012 19:05:27 GMT:

A little extension to it though,
SELECT SYSTEM_TABLE_SCHEMA, SYSTEM_TABLE_NAME,
SYSTEM_TABLE_MEMBER, NUMBER_DELETED_ROWS, DATA_SIZE,
NUMBER_DELETED_ROWS * DATA_SIZE as DeletedSpace

I believe DATA_SIZE indicates all space consumed by data in the
table, so multiplying the number of deleted rows by the total
data space (in bytes) will exaggerate the amount of space
consumed by deleted records.

So, this may be even better:

SELECT SYS_DNAME, SYS_TNAME, SYS_MNAME, case when (AVGROWSIZE <>
-1) then deleted * avgrowsize / 1073741824 else
decimal(double(DELETED)/(DELETED + CARD) * 100 * SIZE /
1073741824,9,4) end as gigabytes_not_in_use FROM
QSYS2/SYSpartitionSTAT WHERE DELETED > 0 ORDER BY 4 desc

Looking at the Information Center for syspartitionstat, I see
that if rows are variable in length, average row size will be -1,
otherwise there will be a valid number of bytes for average row
size.

Sue

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