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IDS Forum

12.10 From 11.50 Using 40% More Space

Posted By: GREGG WALKER
Date: Tuesday, 21 July 2015, at 12:58 p.m.

Migrating from 11.50 FC6 to 12.10 FC5 AIX 7.1 and noticed after importing the database with dbimport that the storage space used on the 12.10 instance increased by more than 40 percent.

The export did not specify extent sizes (-ss option) for the tables. Any ideas why this might be? Do I need to specify a different option with dbimport? I did not see anything new with the dbimport documentation.

Here is the (before and after) onstat -d from both instances. Compare the chunk /dev/rd/d5dbs (11.50) to /dev/rd/d1210dbs (12.10). Both are 256gb raw devices and the only chunk in the ddbs space...

IBM Informix Dynamic Server Version 11.50.FC6 -- On-Line -- Up 1 days 16:57:09 -- 22271696 Kbytes

Dbspaces
address number flags fchunk nchunks pgsize flags owner name
700000463275028 1 0x60001 1 1 4096 N B informix rdbs
700000463275e38 2 0x60001 2 1 4096 N B informix pdbs
700000465037028 3 0x60001 3 1 4096 N B informix ldbs
7000004650371c0 4 0x42001 4 1 4096 N TB informix tdbs
700000465037358 5 0x60001 5 1 4096 N B informix ddbs
5 active, 2047 maximum

Chunks
address chunk/dbs offset size free bpages flags pathname
7000004632751c0 1 1 0 262144 122779 PO-B- /dev/rd/r5dbs
7000004650374f0 2 2 0 524288 524235 PO-B- /dev/rd/p5dbs
7000004650376e0 3 3 0 2097152 1048523 PO-B- /dev/rd/l5dbs
7000004650378d0 4 4 0 4194304 4191617 PO-B- /dev/rd/t5dbs
700000465037ac0 5 5 0 67108864 24434487 PO-B- /dev/rd/d5dbs
5 active, 32766 maximum

NOTE: The values in the "size" and "free" columns for DBspace chunks are

displayed in terms of "pgsize" of the DBspace to which they belong.

Expanded chunk capacity mode: always

IBM Informix Dynamic Server Version 12.10.FC5AEE -- On-Line -- Up 00:31:36 -- 22079792 Kbytes

Dbspaces
address number flags fchunk nchunks pgsize flags owner name
700000033320028 1 0x4070001 1 1 4096 N B informix rdbs
7000000340f3590 2 0x4070001 2 1 4096 N B informix pdbs
7000000340f37c0 3 0x4060001 3 1 4096 N B informix ldbs
7000000340f39f0 4 0x42001 4 1 4096 N TB informix tdbs
7000000340f3c20 5 0x4060001 5 1 4096 N B informix ddbs
5 active, 2047 maximum

Chunks
address chunk/dbs offset size free bpages flags pathname
700000033320258 1 1 0 262144 253563 PO-B-- /dev/rd/r1210dbs
7000000354da028 2 2 0 524288 393163 PO-B-- /dev/rd/p1210dbs
7000000354db028 3 3 0 2097152 1048523 PO-B-- /dev/rd/l1210dbs
7000000354dc028 4 4 0 4194304 4194243 PO-B-- /dev/rd/t1210dbs
7000000354dd028 5 5 0 67108864 6042128 PO-B-- /dev/rd/d1210dbs
5 active, 32766 maximum

NOTE: The values in the "size" and "free" columns for DBspace chunks are

displayed in terms of "pgsize" of the DBspace to which they belong.

Expanded chunk capacity mode: always

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