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IDS Forum

RE: Update statistics performance

Posted By: McCabe-Reed, Barbara SIK
Date: Thursday, 22 July 2004, at 5:17 a.m.

In Response To: Update statistics performance (Kenneth Makobe )

Have you tried rebuilding your indexes and defragging your tables that are
taking many extents?

-----Original Message-----
From: Kenneth Makobe [mailto:Kenneth.Makobe@logicacmg.com]
Sent: Thursday, July 22, 2004 1:39 AM
To: ids@iiug.org
Subject: Update statistics performance [3275]


Hi all
Update Statistic takes a long duration of up to 13 hours to complete, our DB
is more than 35 gb. I tried to use PDQ ,PSORT_NPROCS and DBSPACETEMP and the
was only a slight improvement i.e from 13 to 12 hours. our IDS version is
17.31 uc5 Kindly advice on how this duration can be reduced
Below is the profile and i/o queue stats and onstat -F profile

Profile
dskreads pagreads bufreads Eched dskwrits pagwrits bufwrits Eched
229690758 36261273 617122098 62.78 28229782 19567333 287833239 90.19

isamtot open start read write rewrite delete commit
rollbk
144865383 30923634 247207201 3231528422 186584701 26339127 233319 47761
4

gp_read gp_write gp_rewrt gp_del gp_alloc gp_free gp_curs
0 0 0 0 0 0 0

ovlock ovuserthread ovbuff usercpu syscpu numckpts flushes
0 0 0 529902.17 13244.00 1267 2534

bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans
30833338 50871 3330742991 0 0 4886 396427 3670835

ixda-RA idx-RA da-RA RA-pgsused lchwaits
6695267 15958151 175978636 198623320 15834291

AIO I/O queues:
q name/id len maxlen totalops dskread dskwrite dskcopy
kio 0 0 0 0 0 0 0
kio 1 0 16 57579748 52927126 4652622 0
kio 2 0 0 0 0 0 0
kio 3 0 16 108007501 96187935 11819566 0
kio 4 0 16 97292492 85534898 11757594 0
adt 0 0 0 0 0 0 0
msc 0 0 1 9313 0 0 0
aio 0 0 2 36214109 2 36213915 0
omstat -F


Fg Writes LRU Writes Chunk Writes
61 5808527 35281444

address flusher state data
60050500 0 I 0 = 0X0
600509ec 1 I 0 = 0X0
60050ed8 2 I 0 = 0X0
600513c4 3 I 0 = 0X0
600518b0 4 I 0 = 0X0
60051d9c 5 I 0 = 0X0
60052288 6 I 0 = 0X0
60052774 7 C 79 = 0X4f
60052c60 8 I 0 = 0X0
6005314c 9 I 0 = 0X0
60053638 10 I 0 = 0X0
60053b24 11 I 0 = 0X0
60054010 12 I 0 = 0X0
600544fc 13 I 0 = 0X0
600549e8 14 C 78 = 0X4e
60054ed4 15 I 0 = 0X0
states: Exit Idle Chunk Lru

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