DHCP server answers with delay

Denis Taranushin tda at suttk.ru
Mon Apr 7 08:28:28 UTC 2014

> Yes, definitely look at dhcpd performance.  A large input udp buffer and
> an inadequate disk write transaction rate can cause delays.
> Disk transaction rate is critical for a busy dhcp server.
I have no problem with I/O I'm sure
The server on ESX with sas storage (RAID50 on 22HDDs)

 > See if the disk is constantly busy at the time the issue
 > is happening, and compare tcpdump timing with DHCP log
 > timing.
The time in tcpdump equals syslog's time.


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