Re: High Cpu in 19c ||AIX

Hi,
If query is not seen in db , then too it is posible about the situation you mentioned

Regards,
Krishna

On Tue, 12 Oct 2021, 19:26 Noveljic Nenad, <nenad.noveljic_at_vontobel.com> wrote:

> P.S. it’s not only the update itself. Committing this update bypasses
> private strands. That kind of commit piggybacks the collection of MTTR
> statistics. The MTTR statistics gathering has to traverse all checkpoint
> queues. This is particularly expensive on a machine with many CPUs, because
> the number of checkpoint queues is proportional to the number of CPUs.
>
>
>
> You can see if it gets any better after switching the MTTR advisor off ( _db_mttr_advice
> to OFF ). (My situation improved when I hit a similar problem.)
>
>
>
> *From:* Noveljic Nenad
> *Sent:* Dienstag, 12. Oktober 2021 15:41
> *To:* 'chrishna0007_at_gmail.com' <chrishna0007_at_gmail.com>; Oracle L <
> oracle-l_at_freelists.org>
> *Subject:* RE: High Cpu in 19c ||AIX
>
>
>
> A huge change between two releases: every logon executes the following
> update:
>
>
>
> update user$ set spare6=DECODE(to_char(:2, 'YYYY-MM-DD'), '0000-00-00',
> to_date(NULL), :2) where user#=:1
>
> You can check ash (if you’re licensed) if this statement pops up (sql_id =
> 9zg9qd9bm4spu ). You can sample v$session otherwise.
>
>
>
> Best regards,
>
>
>
> Nenad
>
>
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
> Behalf Of *Krishnaprasad Yadav
> *Sent:* Dienstag, 12. Oktober 2021 15:36
> *To:* Oracle L <oracle-l_at_freelists.org>
> *Subject:* High Cpu in 19c ||AIX
>
>
>
> **** E-Mail from outside Vontobel:* Do not click on links or open
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>
> Hi All,
>
>
>
> We are in situation where post upgrade to 19c , cpu utilization reaching
> 100%
>
> It was upgraded from 11g 11204 to 19.9
>
> On Aix7.2.
>
>
>
> Application team runs certain batch jobs which spawns process and has huge
> logins , in awr login per sec is 150~
>
>
>
> Is logins are heavy weight in 19c compared to 11g or any one faced any
> similar issue
>
> We have applied certain patches for mga so sure that no issues with mga
>
>
>
> Any suggestion/lead will be helpfull
>
>
>
> Regards,
>
> Krishna
>
>
>
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