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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Hanging query puzzle
Kirti,
I've been searching on the IBM site for aiostat without much luck. What kind
of information does it give you? (if I'm going to convince my SA to call IBM
about this I'll need a very good argument. I'm still working on getting the
rights to use sar).
Henry
-----Original Message-----
Kirti
Sent: Wednesday, February 05, 2003 8:29 PM
To: Multiple recipients of list ORACLE-L
Jeff,
If you see the SEQ# field in the v$session_wait view not incrementing, then something else, other than Oracle, is causing a hang up...
On AIX, if you have AIO enabled, try running 'aiostat'. It will show if there are any pending AIO requests. The difficult part would be to relate those pending calls to your session. It is quite likely that a particular AIO server may show waits on I/O, if this hang up is IO related. You can try 'pstat' to find out AIO server processes and associated 'pid' to dig deeper.
If you do not have 'aiostat', ring up IBM Support. It is a nice utility to have, and it is free.
For those on AIX 5L, can you please check if 'aiostat' is available as a standard distribution? I was told by IBM Support that 'aiostat' was going to be available with AIX 5L.
-----Original Message-----
Sent: Wednesday, February 05, 2003 3:20 PM
To: Multiple recipients of list ORACLE-L
It looks like your process really is stuck in a way that has nothing to do with the Oracle code directly.
You might look at the CPU usage of your
session and its shadow using an O/S
utility, but I suspect it would show
zero CPU. Perhaps truss (or the AIX
equivalent) might show your process
spinning on whatever call equates to
'has the async read completed yet'.
You could try doing three processstate
dumps with 5 second intervals to see if
the processstate shows any changes
which might give you a hint - but again
I'd GUESS that you'll find nothing happening.
Regards
Jonathan Lewis
http://www.jlcomp.demon.co.uk
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-----Original Message-----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
Date: 05 February 2003 21:05
>Still sitting there, while we try to figure out exactly why it's
waiting.
>
>
> SID Username EVENT
>WAIT_TIME STATE SECONDS_IN_WAIT
>----- ---------------- ----------------------------------------------
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Deshpande, Kirti INET: kirti.deshpande_at_verizon.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Henry Poras INET: hporas_at_etal.uri.edu Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Thu Feb 06 2003 - 09:33:51 CST
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