Performance issues with Cyrus v2.1.12 on Solaris 5.8

John Alton Tamplin jtampli at
Mon May 5 09:49:48 EDT 2003

Michael Rourke wrote:

> These figures were surprising, so I have tried to determine the source 
> of the slowness - especially of IMAP. Connection and authentication 
> happens faster with V2 (using SASL/PAM/pam_pwdfile) (average elapsed 
> time seen by the simulated client is down to 0.2s from 0.38s). What is 
> significantly slower is the command SELECT "INBOX". The average 
> elapsed time of this command has risen from an average of 0.26s to 
> 1.16s. I added elapsed time collection to cmd_select in imapd.c and 
> found mailbox_open_header() is taking about 0.56s on average and 
> index_newmailbox() is taking 0.33s.
> Can anyone suggest why these two functions are so slow, especially 
> when the V1 equivalents were measurably faster?

What is your configuration?  Are you using BerkeleyDB for the mailbox DB 
or skiplist?

John A. Tamplin                               Unix System Administrator
Emory University, School of Public Health     +1 404/727-9931

More information about the Info-cyrus mailing list