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3323
2014 Oct 22
2
High I/O wait with Dovecot POP3
...of Courier. The IMAP sessions are already handled by those 6 new
servers, but we're encountering high iowait issues when using POP3 on
those servers.
I've applied the hints from http://wiki2.dovecot.org/NFS but this had no
improvement.
The 6 new servers are quad core Intel(R) Xeon(R) CPU X3323 @ 2.50GHz,
with 4 GB RAM connected with gigabit ethernet connection to the storage.
The 4 old servers are single core (w/o HT) P4 2,8 GHz with 1 GB RAM.
# dovecot --version
2.1.7
# /usr/sbin/dovecot -n
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-686-bigmem i686 Debian 6.0.10 ext4
aut...