LIST is slow for 35K mailboxes

[Wesley Craig]

What's your authentication & authorization infrastructure look like?   
Every mailbox has an associated ACL, which must be canonicalized to  
determine whether the user in question gets to see it.  ctl_mboxlist  
just lists whatever it finds.  I've seen Kerberos cause LIST * to  
take a long time -- and I have patches to fix the problem.  Your high  
CPU load suggests a similar problem.  Try sampling (Solaris: truss,  
dtrace?) a process that is spinning like this, to see what kinds of  
actions it's taking.  In the case of Kerberos, the stock Cyrus  
distribution will repeatedly open the krb5.conf file once for each  
mailbox it examines, i.e., 35K times in your case.

:wes

On 09 Oct 2007, at 09:19, Ian G Batten wrote:
> WeBut at root I don't understand why LIST "" * should take any
> longer than, for example, ctl_mboxlist -d.