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IDS Forum

Re: Performance issue after 732 to 94fc6 upgrade

Posted By: ART KAGEL, BLOOMBERG/ 731 LEXIN
Date: Friday, 26 May 2006, at 1:50 p.m.

In Response To: Performance issue after 732 to 94fc6 upgrade (Doug Fossmeyer)

Post some onstat output for us from shortly after the slow app completes:

onstat -p
onstat -d
onstat -D
onstat -P
onstat -c
onstat -g glo
onstat -g iov
onstat -g iof
onstat -g rea (during normal load, preferably during the slow app's run)
onstat -g dsc
onstat -g dic
onstat -g prc
onstat -g cac

Also post the time since these stats were zero'd (startup or onstat -z run).
We'll look it all over and let you know if we see anything.

FYI I do find the EXPLAIN output for the insert unusual. Also post the output
of dbschema/myschema -d <db> -t retwahst -ss and dbschema -d <db> -hd retwahst
for us.

The only thing I notice in the ONCONFIG is that if you are using shared memory
connections more than occassionally I would want to see NETTYPE shm,3,100,CPU
so you have poll threads in all 3 CPU VPs rather than 1.

Art S. Kagel

----- Original Message -----
From: Doug Fossmeyer <ids@iiug.org>
At: 5/26 13:23:21

Hello,

We finally upgraded from 7.32 to 9.40FC6. Some of our batch processes and most
user OLTP are performing as well or better than the 732 version. However 3 of
our large batch processes are now taking 30-40% longer to complete. For
example a process that used to take 7 hrs is now taking 11.5 hrs. I am seeking
some advice on what may be occurring. I have included our onconfig and an
sqexplain for the process in question. One factor that seems strange in the
sqexplain is the cost of the insert statement. I am unsure if that is just how
sqexplain reports the data or if that is the issue.
We are on hp-ux 11.11 with a 4 way 8 gig N class server. IDS 64 bit engine and
32 bit tools/network. The program in question is 4gl. Machine notes were
followed and kernel params slightly modified. The machine does not appear to
be taxed, not paging, cpu ok, etc. No excessive check points and onstat -p, g
ioq, g iof, g iov are OK.

We have run Art's dostats for the database in question and manually update
stats for the system tables recommended by IBM. We did a dbexport and dbimport
for the upgrade. We have rebuilt most of the indexes in question (but not
all). PDQ is not enabled, no fragmentation scheme, did not specify detached
indexes. (During the install we did have one major faux pas, we installed the
64 bit tools, 64 bit engine, 32 bit network. We realised afterwards that we
grabbed the wrong tools cd (64 bit), and needed the 32 bit tools. Our
application vendor and IDS reseller stated we could just re-install the 32 bit
tools over the top w/o having to reinstall the engine and network.)

I want to rule out IDS and server issues before address the business rule set
up or the vendor's code. So any advice or critique is fine.

Thanks in advance,
Doug
<SNIP>

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