Tips: Linux Performance

Gain of performance for harddisk by using 32bits transfers
#hdparm -c3 /dev/hd(X)
to a bootup script. For SuSE and probably other SYS V based systems
/sbin/init.d/boot.local works fine.
This enable 32 bit X-fer for you harddisk. On some systems it boost xfer
performance by 75%.
To test how much you gained type:
#hdparm -t -T /dev/hd(X)
What system services can be turned off?

Disable services for free memory.#chkconfig --del smb

#chkconfig --del cups
#chkconfig --del nscd
#chkconfig --del kudzu
#chkconfig --del mdmpd
#chkconfig --del rhnsd
#chkconfig --del auditd
#chkconfig --del autofs
#chkconfig --del pcmcia
#chkconfig --del psacct
#chkconfig --del smartd
#chkconfig --del ypbind
#chkconfig --del netdump
#chkconfig --del openibd
#chkconfig --del winbind
#chkconfig --del cpuspeed
#chkconfig --del diskdump
#chkconfig --del netplugd
#chkconfig --del bluetooth
#chkconfig --del dc_client
#chkconfig --del dc_server
#chkconfig --del mdmonitor
#chkconfig --del saslauthd
#chkconfig --del lm_sensors
#chkconfig --del tog-pegasus
#chkconfig --del arptables_jf
#chkconfig --del microcode_ctl
#chkconfig --del NetworkManager
#chkconfig --del cups-config-daemon


Links :
http://www.patoche.org/LTT/
http://plone.jcu.edu.au/hpc/staff/cluster-software/linux-tips-and-tricks/system-services/