Re: Locks and Waits

There are many things that you could check:

1) size of the shared pool
2) fragmentation of the shared pool
3) free space in the shared pool (together with 2)

check also the application for parsing (also soft parses).

Check v$rowcache to see access to the rowcache.

Anjo.

"Reddy, Madhusudana" wrote:

> Hello All,
> Here is the result I have got from the v$session_event
>
> SID EVENT
> TIME_WAITED
> ---- ----------------------------------------------------------------
> -----------
> 22 direct path read
> 109
> 20 db file scattered read
> 125
> 24 db file scattered read
> 160
> 26 SQL*Net more data to client
> 162
> 26 db file scattered read
> 191
> 26 db file sequential read
> 230
> 26 log file sync
> 240
> 27 db file sequential read
> 398
> 24 db file sequential read
> 415
> 22 rdbms ipc reply
> 533
> 20 db file sequential read
> 603
> 24 log file sync
> 813
> 24 latch free
> 904
> 20 log file sync
> 917
> 27 log file sync
> 966
> 26 latch free
> 983
> 27 latch free
> 2779
> 20 latch free
> 3212
> 22 db file scattered read
> 4319
> 24 SQL*Net message from client
> 5583
> 20 SQL*Net message from client
> 6261
> 27 SQL*Net message from client
> 7286
> 22 db file sequential read
> 8883
> 22 latch free
> 16164
> 26 SQL*Net message from client
> 56266
> 26 row cache lock
> 6487782
> 27 library cache lock
> 7433464
> 20 library cache lock
> 7433918
> 22 library cache lock
> 7435227
> 24 row cache lock
> 7435680
>
> Could somebody explain me , what are thsese Librarycache Lock and Row cache
> lock, and what should I do..
>
> I could see lot of locks on the database.. and batch jobs are going very
> slow , taking hours ...
>
> Seems to me like something is happening on database, any idea ???
>
> Pl response will be very much appreciated.
>
> Thanks,
> Madhu
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Reddy, Madhusudana
> INET: Madhusudana.Reddy_at_bestbuy.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Anjo Kolk
  INET: anjo_at_oraperf.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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