Re: Shared memory error

That's weird that there would be _any_ shrink/grow when both of your memory *TARGET
*params are 0 and you've set a hard limit for shared_pool_size and db_cache_size.

That doesn't seem correct to me that any shrink/grow operations should occur with those parameters unless something is new in 19c.

Chris

On Wed, Jun 15, 2022 at 5:21 AM Pap <oracle.developer35_at_gmail.com> wrote:

> We are hitting below Ora-4031 in one customer database. Even we have 'free
> memory' available (~2GB) in shared_pool during the error. And also the size
> of the "KKSSP" sub pool and it was showing null value only. Its version
> 19.11 database has the below memory setup. We do see the resize operation
> in which the shared_pool_size was 12GB and was GROWing and db_cache was 2GB
> and was tryin to SHRINK and both errored out.
>
> ORA-04031: unable to allocate 12312 bytes of shared memory ("shared
> pool","unknown object","KKSSP^3497","kglseshtTable")
>
> memory_target - 0, memory_max_target - 0,sga_max_size - 35GB,sga_target -
> 0,shared_pool_size - 8GB,shared_pool_reserved_size -
> 1.2GB,_shared_pool_reserved_pct - 15,db_cache_size- 20GB
>
>

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