--- En date de : Lun 9.3.09, m...@bruningsystems.com <m...@bruningsystems.com>
a écrit :
De: m...@bruningsystems.com <m...@bruningsystems.com>
Objet: Re: [perf-discuss] Sol10 Leak memory
À: "elkhaoul elkhaoul" <elkha...@yahoo.fr>
Cc: "'perf-discuss@opensolaris.org'" <perf-discuss@opensolaris.org>, "Chad
Mynhier" <cmynh...@gmail.com>
Date: Lundi 9 Mars 2009, 15h53
elkhaoul elkhaoul wrote:
>
>
> > ** *Is this any tools to know who use the big portion of RAM ?*
> > ** *Thanks in advance
> > *
> >
> Have you tried:
>
> echo "::memstat" | mdb -k
>
> Do this a few times over some interval to see if the kernel is
> growing.
> Is there a reason you think the leak is in the buffer cache?
>
> Do you have large, growing files in /tmp or a tmpfs mounted
> file system? That can also eat up memory.
> Do you have a large process that is growing?
> You can use prstat -s size
> or prstat -s rss
> to see sorted memory usage of processes.
>
> max
> ================================================
> Thanks max,
> Look at Kernel size : it's growing by about 3Mb every 5minutes :
>
> ############# echo ::memstat |mdb -k
> Page Summary Pages MB %Tot
> ------------ ---------------- ---------------- ----
> Kernel 186591 *1457* 18%
> Anon 446868 3491 43%
> Exec and libs 4381 34 0%
> Page cache 67048 523 6%
> Free (cachelist) 155799 1217 15%
> Free (freelist) 180976 1413 17%
> Total 1041663 8137
> Physical 1024808 8006
> ############ echo ::memstat |mdb -k
> Page Summary Pages MB %Tot
> ------------ ---------------- ---------------- ----
> Kernel 186997 *1460* 18%
> Anon 447465 3495 43%
> Exec and libs 4374 34 0%
> Page cache 72474 566 7%
> Free (cachelist) 152954 1194 15%
> Free (freelist) 177399 1385 17%
> Total 1041663 8137
> Physical 1024808 8006
> ############ echo ::memstat |mdb -k
>
Are you using ZFS? Regardless, you could run:
echo "::kmastat" | mdb -k
And again, do it periodically over some interval.
Then examine the third to last column ("Memory in Use") to
see which cache(s) are steadily increasing. ZFS also likes memory.
kmastat will tell you about memory used by (most of?) zfs.
You can get statistics about the adaptive replacement cache (arc) that
zfs uses, but I think the method depends on the version of Solaris.
On my OpenSolaris build 101b, I can use:
echo "::arc" | mdb -k | grep size
Again, run this multiple times to see if the size is increasing over time.
I used to have problems with arc eating up all of my memory on my laptop,
simply by doing a "find ." on a 40GB zfs file system. I only had 1GB memory,
and very quickly, it all disappeared. But I haven't had those problems since
upgrading to 2GB ram. (I have also updated the version of nevada I am running
several times since the 2gb upgrade).
=======================================================
The ZFS isn't installed on this server, but I see that Kernel memory is
increasing :
In put this on crontab : "echo ::memstat | mdb -k > /stats/memstat.out" I am
checking that Kernel == 1493, 2 hours ago, it was 1460 ( +10Mb/hours), it's
strange, it should be Kernel or Application Leak memory ???????
This is the output of echo ::memstat | mdb -k
Page Summary Pages MB %Tot
------------ ---------------- ---------------- ----
Kernel 191219 1493 18% <----- Increae
Anon 445790 3482 43%
Exec and libs 4509 35 0%
Page cache 104862 819 10%
Free (cachelist) 140081 1094 13%
Free (freelist) 155202 1212 15%
Total 1041663 8137
Physical 1024808 8006
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