Using Solaris-10 with Oracle 10g (i.e. 10.2.0.3)
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Solaris Memory Utilization for Oracle Database
Need Unix-Solaris commands or utility to better understand memory consumption. Ideal plan would be to identify how much memory our application and Oracle database are using respectively. Thus far I have used top, and ps -elf, which have not necessarily given me the detailed information required. Note, our Oracle database appears to consume an enormous amount of memory while the application uses very little on our large sun box which has 24Gigs of physical memory. Oracle is configured to acquire 4Gig and the application uses very little, but yet recently we ran out of memory.
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Answers
Ref: http://www.dbspecialists.c
Item 8.
From the above link the /etc/system (kernel settings)
set shmsys:shminfo_shmmax=4294
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set semsys:seminfo_semmns=1024
set semsys:seminfo_semmsl=256
set semsys:seminfo_semmni=100
set semsys:seminfo_semvmx=3276
set noexec_user_stack=1
You may have over allocated the shared memory shmmax*shmmni > system memory.
Hi,
Use Process Map pmap tool to get memory allocated for each process (equivalent to kmeminfo in HPUX and svmon p in AIX)
Here are some examples of pmap usage:
http://www.solarisinternal
http://www.cse.psu.edu/~dh
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by: arnoldPosted on 2008-09-23 at 19:51:18ID: 22556248
vmstat is one such command that will report memory and swap usage.
Presumably you added the system shared memory directives that oracle recommends.
pstat, prsat might also be available.
You can use vmstat, prstat, iostat, pstat and vmstat to take snapshots at certain intervals to see what process grows so much as to lead to the memory issue.
Which version of Solaris is being used?