Re: Performance issue system swap partition.

On 03/09/07, nilesh vaghela <nileshj.vaghela@xxxxxxxxx> wrote:
We have RHEL 3 running groupware horde with around 400 users.

output of the top is like

11:56:24 up 12 days, 14:29, 3 users, load average: 17.56, 13.86, 17.18
215 processes: 211 sleeping, 1 running, 3 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 133.8% 0.0% 15.6% 0.0% 0.0% 50.0% 0.0%
cpu00 66.7% 0.0% 8.1% 0.0% 0.0% 25.0% 0.0%
cpu01 67.1% 0.0% 7.5% 0.0% 0.1% 25.0% 0.0%
Mem: 1024780k av, 1007952k used, 16828k free, 0k shrd, 16804k
buff
752416k actv, 142348k in_d, 17892k in_c
Swap: 1999992k av, 286856k used, 1713136k free 548700k
cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM CTIME CPU COMMAND
27403 postgres 17 0 18932 18M 17512 S 36.8 1.8 0:01 0 postmaster
22027 apache 20 0 14064 13M 3948 S 9.9 1.3 0:06 1 httpd
9730 apache 16 0 15556 14M 4032 S 9.7 1.4 0:23 0 httpd
15890 apache 19 0 15504 14M 4016 S 6.3 1.4 0:18 1 httpd
7907 apache 18 0 15128 14M 4024 S 5.3 1.4 0:14 1 httpd
19281 apache 15 0 15324 14M 3984 S 2.9 1.4 0:12 1 httpd
8 root 15 0 0 0 0 SW 1.7 0.0 43:14 0 kscand
26073 apache 16 0 13784 12M 3912 S 1.7 1.2 0:01 1 httpd
26056 apache 16 0 14588 13M 3928 S 1.5 1.3 0:01 0 httpd
26152 amish.sh 15 0 1152 1112 1020 D 1.5 0.1 0:05 0 imap
19330 apache 15 0 15120 13M 3968 S 1.3 1.3 0:12 1 httpd
21861 apache 16 0 14568 13M 3952 S 1.3 1.3 0:05 1 httpd
22028 apache 15 0 14228 12M 3964 S 1.1 1.2 0:08 1 httpd
21860 apache 15 0 14436 13M 3964 S 0.9 1.3 0:06 0 httpd

--------

#free -m
total used free shared buffers cached
Mem: 1000 985 15 0 16 584
-/+ buffers/cache: 384 616
Swap: 1953 262 1691
# iostat
Linux 2.4.21-47.0.1.ELsmp (mailserver) 09/03/2007

avg-cpu: %user %nice %sys %idle
8.62 0.00 1.67 89.72

Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
dev8-0 51.10 2174.61 528.74 2031403260 493924264
dev8-1 20.50 1051.40 1106.51 982162050 1033642680


Why it is consuming so high swap even the free memory is there ???

The io wait consume almost all the cpu power. ??


--
Nilesh Vaghela
ElectroMech
Redhat Channel Partner and Training Partner
74, Nalanda Complex, Satellite Rd, Ahmedabad
25, The Emperor, Fatehgunj, Baroda.
www.electromech.info

Could you post the output of 'cat /proc/meminfo', please?

Kind regards,

Herta

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