Re: kernel memory keeps increasing and running out of memory (Sun T4, Solaris 10)
- From: Eagle Fan <eagle.f@xxxxxxxxx>
- To: Tanel Poder <tanel@xxxxxxxxxxxxxx>
- Date: Tue, 26 Feb 2013 10:25:08 +0800
Thank you very much Tanel.
I don't have privileges to run dtrace on the servers, I will have SA to run
it. Upgrade to latest version is a good suggestion:)
On Mon, Feb 25, 2013 at 12:07 PM, Tanel Poder <tanel@xxxxxxxxxxxxxx> wrote:
> Long story short - memory leaks are hard to diagnose, but at least you
> have dtrace. Nevertheless, it might be just easier to patch the OS to the
> latest version first and hope the problem goes away.
>
> --
> *Tanel Poder*
> Enkitec (The Exadata Experts)
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>
>
> On Mon, Feb 25, 2013 at 6:05 AM, Tanel Poder <tanel@xxxxxxxxxxxxxx> wrote:
>
>> As your memory allocation seems to be increasing, then taking strack
>> traces when kmem_alloc function is called would help to pinpoint who & when
>> is allocating the memory.
>>
>> For example, something like this (although you may want to modify it to
>> kick in for any process):
>>
>> #!/usr/sbin/dtrace -qs
>>
>> #pragma D option quiet
>>
>> fbt::kmem_*alloc:entry,
>> fbt::bkmem_alloc:entry
>> /execname == "oracle" && curpsinfo->pr_psargs == "oracleSOL102
>> (LOCAL=NO)" /
>> {
>> @kmem[probefunc,stack()] = sum(arg0)
>> }
>>
>>
>>
--
Eagle Fan (www.dbafan.com)
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