Re: High Memory Usage

We are using UFS, however the FS where the datafiles are housed, are mounted
with forcedirectIO and in DB we have filesystemio_options set to setall.

On Tue, Aug 30, 2011 at 12:26 PM, LS Cheng <exriscer@xxxxxxxxx> wrote:

> what sort of filesystem are you using?
>
> thanks
>
> --
> LSC
>
>
> On Fri, Aug 26, 2011 at 10:02 AM, Stalin <stalinsk@xxxxxxxxx> wrote:
>
>> All,
>>
>> I'm trying to figure out high memory usage on one of the DB servers we
>> have and wondering if pga_aggregate_target could ever exceed from what's
>> allocated.
>>
>> We have sga_target set to 16G and pga_a_t set to 2G, however from
>> statspack, i see pga usage to be close to 3G. Is that normal. I have posted
>> relevant sections from statspack for reference.  Though i see only 59% of
>> total memory being used, vmstat reports 29G being used. Any idea what could
>> be causing it. This node is a dedicated DB server and only one DB runs on
>> it.
>>
>> Memory Statistics                       Begin          End
>> ~~~~~~~~~~~~~~~~~                ------------ ------------
>>                   Host Mem (MB):     32,640.0     32,640.0
>>                    SGA use (MB):     16,315.7     16,315.7
>>                    PGA use (MB):      2,854.4      2,981.5
>>     % Host Mem used for SGA+PGA:         58.7         59.1
>> -------------------------------------------------------------
>> Instance Activity Stats
>> workarea memory allocated                   0        6,043
>>
>> Statistic                                      Total     per Second    per
>> Trans
>> --------------------------------- ------------------ --------------
>> ------------
>> workarea executions - onepass                      0            0.0
>>    0.0
>> workarea executions - optimal                  7,635            2.1
>>    0.0
>>
>> --
>> Thanks,
>>
>> Stalin
>>
>> 11gR2, Solaris 10
>>
>
>


-- 
Thanks,

Stalin

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