Re: Reproducing ORA-04036

From: Mikhail Velikikh <mvelikikh_at_gmail.com>
Date: Fri, 30 Oct 2020 16:27:17 +0000
Message-ID: <CALe4HpnzAZG2z8VupOj7RJoSG1Q5sFEJBEKXdyVcYwLGR55mLQ_at_mail.gmail.com>



Hi Nenad,

Sys might be exempted from ORA-04036.
>

Indeed it is.

https://docs.oracle.com/en/database/oracle/oracle-database/19/refrn/PGA_AGGREGATE_LIMIT.html#GUID-E364D0E5-19F2-4081-B55E-131DF09CFDB3

SYS processes and background processes other than job queue processes will
> not be subjected to any of the actions described in this section. Instead,
> if they are using the most untunable memory, they will periodically write a
> brief summary of their PGA usage to a trace file.
>

On Fri, 30 Oct 2020 at 16:22, Noveljic Nenad <nenad.noveljic_at_vontobel.com> wrote:

> I reproduced the error by running the procedure under a non-sys user. Sys
> might be exempted from ORA-04036.
>
>
>
> I had to put fill_memory at the end of the body to compile it under a
> non-sys user. Under sys this wasn’t necessary. This might indicate that the
> compiler makes two passes when compiling sys objects and only one pass for
> non-sys.
>
>
>
> With every mistake we learn something new. This time, the luck was double.
>
>
>
> Best regards,
>
>
>
> Nenad
>
>
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
> Behalf Of *Noveljic Nenad
> *Sent:* Freitag, 30. Oktober 2020 16:59
> *To:* Mikhail Velikikh <mvelikikh_at_gmail.com>
> *Cc:* ORACLE-L (oracle-l_at_freelists.org) <oracle-l_at_freelists.org>
> *Subject:* RE: Reproducing ORA-04036
>
>
>
> Hi Mikhail,
>
>
>
> It hasn’t worked for me on 19.8 (Linux) and 19.7 (Solaris x64).
> Pga_aggregate_limit=2G .
>
>
>
> Best regards,
>
> Nenad
>
>
>
> *From:* Mikhail Velikikh <mvelikikh_at_gmail.com>
> *Sent:* Freitag, 21. August 2020 15:39
> *To:* Noveljic Nenad <nenad.noveljic_at_vontobel.com>
> *Cc:* ORACLE-L (oracle-l_at_freelists.org) <oracle-l_at_freelists.org>
> *Subject:* Re: Reproducing ORA-04036
>
>
>
> Hi Nehad,
>
>
>
> I slightly amended the package to raise an ORA-4036 in my 19c database:
>
>
>
> https://gist.github.com/mvelikikh/3306c657ab43ea1a32304114dc4c84d2
>
>
>
> Here is the call:
>
>
>
> SQL> exec pkg.fill_memory
> BEGIN pkg.fill_memory; END;
>
> *
> ERROR at line 1:
> ORA-04036: PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT
>
>
>
> Here is the alert log:
>
>
>
> 2020-08-21T13:29:05.537784+00:00
> Errors in file
> /u01/app/oracle/diag/rdbms/racdb/racdb2/trace/racdb2_ora_99191.trc
> (incident=64761) (PDBNAME=PDB):
> ORA-04036: PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT
> PDB(3):Incident details in:
> /u01/app/oracle/diag/rdbms/racdb/racdb2/incident/incdir_64761/racdb2_ora_99191_i64761.trc
> 2020-08-21T13:29:14.350039+00:00
> Errors in file
> /u01/app/oracle/diag/rdbms/racdb/racdb2/trace/racdb2_ora_99191.trc
> (incident=64762) (PDBNAME=PDB):
> ORA-04036: PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT
> PDB(3):Incident details in:
> /u01/app/oracle/diag/rdbms/racdb/racdb2/incident/incdir_64762/racdb2_ora_99191_i64762.trc
> 2020-08-21T13:29:15.546665+00:00
> Errors in file
> /u01/app/oracle/diag/rdbms/racdb/racdb2/trace/racdb2_ora_99191.trc
> (incident=64763) (PDBNAME=PDB):
> ORA-04036: PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT
> PDB(3):Incident details in:
> /u01/app/oracle/diag/rdbms/racdb/racdb2/incident/incdir_64763/racdb2_ora_99191_i64763.trc
> 2020-08-21T13:29:20.324556+00:00
> PGA memory used by the instance exceeds PGA_AGGREGATE_LIMIT of 3072 MB
> (3):KILL SESSION for sid=(416, 25734):
> (3): Reason = pga_aggregate_limit
> (3): Mode = KILL HARD SAFE -/-/-
> (3): Requestor = DBRM (orapid = 15, ospid = 10928, inst = 2)
> (3): Owner = Process: USER (orapid = 95, ospid = 99191)
> (3): Result = ORA-0
>
>
>
> It is a two node RAC 19.6 with pga_aggregate_limit=3G:
>
>
>
> [oracle_at_rac2 ~]$ $ORACLE_HOME/OPatch/opatch lspatches
> 30484981;OJVM RELEASE UPDATE: 19.6.0.0.200114 (30484981)
> 30489227;OCW RELEASE UPDATE 19.6.0.0.0 (30489227)
> 30557433;Database Release Update : 19.6.0.0.200114 (30557433)
>
> OPatch succeeded.
>
>
>
> Best regards,
>
> Mikhail Velikikh
>
>
>
>
>
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> not intended as an offer or solicitation for the purchase or sale of any
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> consent to forward you commercial communications. You can exercise, at any
> time and under the terms established under current regulation, your rights.
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Received on Fri Oct 30 2020 - 17:27:17 CET

Original text of this message