RE: oracle handing memory allocation different between 11g and 12c?

From: Matt Adams <MAdams_at_TroverSolutions.com>
Date: Tue, 16 Feb 2016 18:37:45 +0000
Message-ID: <2038d67a96e047a49e21e0a6642f56ff_at_wpvl1dag02.hcrec.com>



Stefan,
  Can you tell me which version and release of Solaris you are using?

Matt

-----Original Message-----
From: Stefan Koehler [mailto:contact_at_soocs.de] Sent: Tuesday, February 16, 2016 12:07 PM To: Matt Adams
Cc: oracle-l_at_freelists.org
Subject: RE: oracle handing memory allocation different between 11g and 12c?

Hi Matt,
not quite sure what's wrong in your env. OSM and 12.1.0.2 works like a charm here :)

root_at_SOL:~# pmap -xs 1827
1827: ora_smon_S12DB

         Address Kbytes RSS Anon Locked Pgsz Mode Mapped File …

0000000060000000       4096       4096          -       4096   2M rwxs-    [ osm shmid=0x5000009 ]
0000000080000000      98304      98304          -      98304    - r-xs-    [ osm shmid=0x500000a ]
00000000C0000000    3981312    3981312          -    3981312   2M rwxs-    [ osm shmid=0x500000b ]
00000001C0000000      14336      14336          -      14336   2M rwxs-    [ osm shmid=0x500000c ]

Please DTrace the corresponding syscalls to get a better insight in your case.

root_at_SOL:~# dtrace -l

   ID   PROVIDER            MODULE                          FUNCTION NAME
…
  256    syscall                                             memcntl entry
  257    syscall                                             memcntl return
20833        fbt           genunix                           memcntl entry
20834        fbt           genunix                           memcntl return
78362        fbt            shmsys                        shmget_osm entry
78363        fbt            shmsys                        shmget_osm return
78364        fbt            shmsys                            shmget entry
78365        fbt            shmsys                            shmget return

Best Regards
Stefan Koehler

Freelance Oracle performance consultant and researcher Homepage: http://www.soocs.de
Twitter: _at_OracleSK

> Matt Adams <MAdams_at_TroverSolutions.com> hat am 16. Februar 2016 um 16:28 geschrieben:
>
> But in 12c, Oracle prefers using OSM over either ISM or DISM. That appears to be the cause the of the problems I’m having.
>
> Anybody else install 12c on solaris and have issues with OSM not working as expected?
>
> Matt

**** This communication may contain privileged and/or confidential information. If you are not the intended recipient, you are hereby notified that disclosing, copying, or distributing of the contents is strictly prohibited. If you have received this message in error, please contact the sender immediately and destroy any copies of this document. **** i0zX+n{+i^ Received on Tue Feb 16 2016 - 19:37:45 CET

Original text of this message