My first message has been banned for too many latters.
>
Hi all
There is something wrong and ugly.
1)
Intel 32 core = 2*8 *2threads
Linux avi-sql09 2.6.32-5-amd64 #1 SMP Sun May 6 04:00:17 UTC 2012 x86_64 GNU/Linux
PostgreSQL 9.2.2 on x86_64-unknown-linux-gnu, compiled by gcc-4.4.real (Debian 4.4.5-8) 4.4.5, 64-bit
shared_buffers 64GB / constant hit rate - 99,18
max_connections 160 / with pgbouncer pools there could not be more than 120 connections at all
work_mem 32M
checkpoint 1h 1.0
swap off
numa off, interleaving on
24*128GB HDD (RAID10) with 2GB bbu (1,5w+0,5r)
2)
free -g
total used free shared buffers cached
Mem: 378 250 128 0 0 229
-/+ buffers/cache: 20 357
and
! disks usage 100% (free 128GB! WHY?)
disk throughput - up-to 30MB/s (24r+6w)
io - up-to 2,5-3K/s (0,5w + 2-2,5r)
3) so maybe I've got something like this
http://www.databasesoup.com/2012/04/red-hat-kernel-cache-clearing-issue.html
or this
http://comments.gmane.org/gmane.comp.db.sqlite.general/79457
4) now i think
a) upgrade linux core or
b) set buffers to something like 300-320Gb
my warm work set is about 300-400GB
db at all - 700GB
typical work load - pk-index-scans
--
looking forward
thanks
>
Mikhail
