Re: ora-04031 and x$ksmlru

Raj,

I'm betting that some clown somewhere started using ALTER SESSION SET SORT/HASH_AREA_SIZE = <obscene-value>" yesterday afternoon, which is when Barbara started getting paged for this...

-Tim

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, May 16, 2002 12:40 PM

> Tim,
>
> I don't know if it matters, but we faced the same error in 9x, and when we
> set the hash_area_size to 1M, it went away. The exact error message for us
> was
>
> ORA-04031: unable to allocate 1126656 bytes of shared memory ("shared
> pool","unknown object","hash-join subh","kllcqc:kllcqslt")
>
> The 3rd parameter is "hash-join subh", so I think it pertains to hash
joins.
> For Barb, the third parameter is "cursor work he(ap)" so I wonder would it
> pertain to hash_area_size at all?
>
> Raj
> ______________________________________________________
> Rajendra Jamadagni MIS, ESPN Inc.
> Rajendra dot Jamadagni at ESPN dot com
> Any opinion expressed here is personal and doesn't reflect that of ESPN
Inc.
>
> QOTD: Any clod can have facts, but having an opinion is an art!
>
>
> -----Original Message-----
> Sent: Thursday, May 16, 2002 2:14 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Thanks to the wonderful search capabilities that Steve Adams has installed
> on his website at www.ixora.com.au, the following page has some more
> information about the X$KSMLRU fixed-table
> (http://www.zoftware.org/tuning/tune_shared_pool.html#fixed_table)...
>
> I did an "advanced search" on MetaLink for "kllcqc", making sure to check
> the checkbox for "Bug Database" -- quite a few bugs appeared (for what
they
> are worth). One of them (#2324210) is against 9.0.1.3 on Solaris, but the
> error message looks remarkably like yours even so. Like you, they are
using
> MTS. They indicate that the settings for SORT_AREA_SIZE and HASH_AREA_SIZ
E
> are too large for the Shared Pool, hence the ORA-04031. The solution is
to
> reduce SORT_AREA_SIZE and HASH_AREA_SIZE...
>
> What are the settings for SORT_AREA_SIZE and HASH_AREA_SIZE here? Is it
> possible that the users may be using ALTER SESSION SET to set their own
> "custom" values for these parameters? I think this statement should
appear
> in the V$SQL or V$SQLAREA if they are using it. This would possibly
explain
> the sudden (and violent) onset of these symptoms...
>

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Author: Tim Gorman
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