Horde sendmail load everage performance problem

[nilesh vaghela]

We are using following server to serve 350 users with sendmail and horde as
front end. We use postgresql with horde.

Some time the load everage suddenly increase and cross 30. at that time the
top processes are postmaster and the i/o statistics were consuming almost
90% of the cpu power.

It is on RHEL3

IBM X226 Server 8648iAS
X226 Xeon 3.0 Ghz with EM64T Technology
2 MB L2 Cache / 800 Mhz FSB
1024 MB ECC DDR2 SDRAM
Dual Channel U320 Scsi HDD Hot Swap
Gigabite Ethernet

What could be check ??


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