On Fri, 10 Oct 2003, Arnt Gulbrandsen wrote: > Chris Wilson writes: > > squirrelmail says it'll improve my performance, kinda makes sense. > > > > http://www.squirrelmail.org/wiki/en_US/SquirrelMailPerformance > > I'm seeing that IMAP connection open takes about a second, depending on > RTT. Most of that is STARTTLS and AUTHENTICATE processing.
Sure, but if the machine is seeing many connections per second, its maximum fork rate starts to hurt. Preforking can alleviate this to some extent. Reusing processes can do even better. I didn't realize that UW could do either (and based on Mark's comments, I suspect that there was some broad misinterpretation somewhere). > So in the best case you're looking at performance improvements below one > per cent. If you want actual improvements, look at keeping IMAP > connections alive for longer, so you don't have to incur the startup > cost so often. Yes, this is clearly what should be being done to solve the real issue, which is that many webmail clients (Squirrelmail included) handle IMAP connection managment poorly. The IMAP Proxy information on the SquirrelMailPerformance page is probably worth a look. -Rob -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Rob Siemborski | Andrew Systems Group * Research Systems Programmer PGP:0x5CE32FCC | Cyert Hall 207 * [EMAIL PROTECTED] * 412.268.7456 -----BEGIN GEEK CODE BLOCK---- Version: 3.12 GCS/IT/CM/PA d- s+: a-- C++++$ ULS++++$ P+++$ L+++(++++) E W+ N o? K- w O- M-- V-- PS+ PE++ Y+ PGP+ t+@ 5+++ R@ tv-@ b+ DI+++ G e h r- y? ------END GEEK CODE BLOCK-----
