We are providing a webmail service to this year's new students (< 8000) based on IMP. I am running Cyrus imapd version 2.1.9 with Berkeley DB 3.3.11 on a Sun 420R with 4 x 450 MHz processors and 4Gbytes of memory, but it is on its knees at busy times. Now maybe the hardware isn't beefy enough for the load which IMP puts on the server, but I was given the impression that because Cyrus is so very efficient it would not be a problem.
Having watched the activity, the thing which seems to consume most of the resources are the LIST "" * and LIST "" % commands. These return with a response like "OK Completed (1.480 secs 28 calls)" but can take a very long real time. Is there anything which can be done to speed up the performance of the LIST command? My imapd.conf is appended. TYIA Richard -- Richard Gilbert Corporate Information and Computing Services University of Sheffield, Sheffield, S10 2TN, UK Phone: +44 114 222 3028 Fax: +44 114 222 3040 configdirectory: /var/imap partition-default: /var/spool/imap partition-imap2: /var/spool/imap2 admins: cyrus exim sasl_pwcheck_method: saslauthd sasl_mech_list: plain hashimapspool: yes altnamespace: yes
