Israel Garcia napsal(a):
Hi list, I'm running collectd 4.7.2 on a xen domU(debian lenny) and on a Dual Intel 1.4GHz, RAID1 with 2x36GB SCSI 10,500RPM . I'm collecting information of more than 100 servers (a lot of rrd files), so cpu load is always at 100% iowait, the load is always over 3, disk is doing over 400 IOPS and 3MB/s througput. No more domU's are running in this dom0 server. How can I improve the performance in this server? Can you help me?
Hi,
1) try adjusting cache parameters:
<Plugin rrdtool>
DataDir "/var/lib/collectd/rrd"
CacheTimeout 485
CacheFlush 1800
</Plugin>
The more sec you keep cache, the less io collectd generates. Tradeof is
in "lag" of graphs behind current time.
2) try adjusting filesystem params, if you are using ext3, try mount options noatime,commit=600
3) change your raid configuration to raid0 or 10 4) add more ram if your system is swaping5) adjust rrd files "time precision" if you do not need acuracy to seconds, this will keep whole dataset smaller.
-- S pozdravem Josef Liška CHL | system care Telefon: +420.272048055 Fax: +420.272048064 Mobil: +420.776026526 denně 9:00 - 17:30 Jabber: [email protected] https://www.chl.cz/
<<attachment: jl.vcf>>
_______________________________________________ collectd mailing list [email protected] http://mailman.verplant.org/listinfo/collectd
