Ronan said: > Hello, > > I'd appreciate any help or suggestions anyone would have with the > following... > > I have 2 servers (both Dell PE2650s, 2GB RAM, Dual Xeon) running RHEL 3 > ES (with latest updates), and the latest Red Hat supplied Squirrelmail > (squirrelmail-1.4.3-0.e3.1) and Courier IMAP (courier-imap-3.0.4). > Apache is standard RH shipped config (httpd-2.0.46-32.ent.3) and normal > accompanying PHP (php-4.3.2-11.1.ent). > > I have the maildir for each user in /home/user, which is common to both > servers (shared by NFS from a NetApp filer). The front end is looked > after by a Foundry ServerIron. > > There is one particular account on the system which we need to be used > by about 20 people at once. This account would normally have 5,000 to > 8,000 (small) mails in the Inbox, which the 20 concurrent operators work > their way through. > > This is absolutely killing the system, sucking it almost dry on > resources, but not completely, as other single user accounts are quite > responsive. But to open the shared account is taking about a minute, as > is any subsequent action within that account. HTTPD and IMAP are using > all the RAM they can get. > > I am slow to implement an IMAP proxy, as this is a shared account I > don't know what nasties it may cause. So asides from that, can anyone > suggest any way of making this more usable? > > Any and all help is greatly appreciated. > > Kind regards,
Hmmm... My guess is that the problem is due to the load sharing + the fact that multiple users access the Maildir at once, were it only 1 server accessing the Maildir for all 20 users, it could eventually cache the whole Maildir, or at the very least, you'd get a lot more cache hits. But as two servers are accessing the share, neither can rely on cacheing any of the data and must constantly go back to read it again. 10 of the users are on one server and 10 are on another, neither server can even temporarily count on it's cache. Maybe those 20 users could all use only 1 of the two systems so that that system is the only one accessing the Maildir and won't have to constantly verify its cache is still good... Just a shot in the dark. Jay -- Jay Lee Network / Systems Administrator Information Technology Dept. Philadelphia Biblical University -- The main problem I have with cats is, they're not dogs. --Kevin Cowherd ------------------------------------------------------- This SF.Net email is sponsored by BEA Weblogic Workshop FREE Java Enterprise J2EE developer tools! Get your free copy of BEA WebLogic Workshop 8.1 today. http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click -- squirrelmail-users mailing list List Address: [EMAIL PROTECTED] List Archives: http://sourceforge.net/mailarchive/forum.php?forum_id=2995 List Info: https://lists.sourceforge.net/lists/listinfo/squirrelmail-users
