Cédric, thanks a lot for your answer so far!
On Thu, Jan 27, 2011 at 12:24 PM, Cédric Villemain
<cedric.villemain.debian@xxxxxxxxx> wrote:
> you have swap used, IO on the swap partition ?
Memory-wise we are fine.
> can you paste the /proc/meminfo ?
Sure:
# cat /proc/meminfo
MemTotal: 16461012 kB
MemFree: 280440 kB
Buffers: 60984 kB
Cached: 13757080 kB
SwapCached: 6112 kB
Active: 7049744 kB
Inactive: 7716308 kB
Active(anon): 2743696 kB
Inactive(anon): 2498056 kB
Active(file): 4306048 kB
Inactive(file): 5218252 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 999992 kB
SwapFree: 989496 kB
Dirty: 3500 kB
Writeback: 0 kB
AnonPages: 943752 kB
Mapped: 4114916 kB
Shmem: 4293312 kB
Slab: 247036 kB
SReclaimable: 212788 kB
SUnreclaim: 34248 kB
KernelStack: 3144 kB
PageTables: 832768 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 9230496 kB
Committed_AS: 5651528 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 51060 kB
VmallocChunk: 34350787468 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 7936 kB
DirectMap2M: 16760832 kB
> Also turn on log_checkpoint if it is not already and check the
> duration to write the data.
Will do, thanks!
> You didn't said the DB size (and size of active part of it), it would help here.
=> select pg_size_pretty(pg_database_size('xxx'));
pg_size_pretty
----------------
32 GB
(1 row)
> it is too much with 200 connections. you may experiment case where you
> try to use more than the memory available.
So far memory never really was a problem, but I'll keep these
suggestions in mind.
> 16MB should work well
We already thought of increasing that, will do so now.
>> effective_cache_size = 8192MB
>
> 12-14GB looks better
Thank you, I was rather unsure on this on.
> you use full_text_search ?
Not anymore, probably a leftover.
> do you monitor the 'locks' ? and the commit/rollbacks ?
No, but I'll look into doing that.
Thanks a lot for the feedback again,
Michael
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