On Mon, September 25, 2006 6:06 pm, Paul Lesniewski wrote: > On 9/25/06, Paul A. Franz, P.E. <paul@xxxxxxxxxxxxx> wrote: >> I have that problem too. But only when there the account has a lot of e-mail in it. >clip clip clip > > Yeah, but UW is probably the last IMAP server you want to run if you > really want a solid, fast, and full featured mail server. I'm not sure why you want to castigate the UW-IMAP server. It, afterall, is the choice of Redhat in their distributions. Probably because it is mature, bug-free and stable. > Using > maildir instead of mailbox is also a factor. I believe this to be true, however message content in files are most often very small and with allocated blocksizes (disk) being 32k or larger, this structure greatly expands the total disk space allocation since probably 80 to 90% of the allocated space is slack space. E.g., a 300 character message takes 32k or 64k or more to store it as a file since file space is allocated in blocks and each file needs a 1 block minimum allocation. With disk space being relatively cheap, maybe this isn't as much of a concern anymore even with lots of users storing thousands upon thousands of e-mails, each as a separate file. > >> > 5. If you use imapproxy, check proxy debugging options. >> >> When would one run an imap proxy? How and why would you do that? > > For explanation, please see > http://www.squirrelmail.org/wiki/SquirrelMailPerformance You opened a can of worms here! The text starts off with a sample query: > telnet imapserver.example.com imap * OK 2 capability * CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE AUTH=PLAIN STARTTLS 2 OK CAPABILITY completed When I contacted my IMAP server it didn't even wait for the "capability" command and responded as follows. [root@Beaker config]# telnet beaker imap Trying 127.0.0.1... Connected to beaker. Escape character is '^]'. * OK [CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS AUTH=LOGIN] Beaker.eucleides.com IMAP4rev1 2003.338rh at Mon, 25 Sep 2006 20:06:47 -0700 (PDT) capability capability BAD Missing command CAPABILITY CAPABILITY BAD Missing command . . BAD Missing command ^] telnet> Connection closed. I assume that response is coming from UW-IMAP and not Sendmail. The telnet request was initiated on port 'imap'. It wouldn't accept the capabilities query in upper or lowercase. Within SM selecting Options/IMAP I selected all 8 boxes for the tests and in about 10 to 15 seconds it returned this result in the box at the top of the page: Server Capability response: * CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND LOGIN-REFERRALS STARTTLS AUTH=LOGIN So, in spite of my difficulties contacting the IMAP server directly, it would appear I have SORT capapbility. After reading through the entire page and groaning about the work involved in implementing server side sorting with Procmail I read: IMAP Servers Dovecot IMAP server Use of the Dovecot IMAP server (free and fast, and supposedly the next default IMAP server for Red Hat Enterprise 4) speeds up SquirrelMail for even very large folders without migrating to maildir format. You can switch from UW-IMAP using mbox format directly to Dovecot and turn an almost unusable SquirrelMail into a fast system. Dovecot uses indexing which significantly speeds up header listing, etc. I had used an IMAP proxy before to help. After installing Dovecot, I just disabled the proxy because Dovecot alone is much faster than UW-IMAP with the proxy. I'll second that suggestion! Forget about all the other optimizations and switch to Dovecot. I'm running multi-GB maildirs and Squirrelmail was almost unusable with Courier IMAP. Switching to Dovecot changed the response time from minutes to less than a second. -- terry@xxxxxxxxxx So, I guess I'll look for Fedora Legacy rpm of this. (Procrasting on upgrading to FC 4). FC 5 has library problems in regard to using MySQL so, I returned to FC Core one (Legacy). I spend far too much time with admin functions, especially ant-spam measures and I am not getting any time off from work for vacation because I don't get enough work done after all the admin time spent. Hence the reluctance to take on more time consuming activities. > > Have you tried SM 1.5 (development stream)? It's got some large speed > improvements for the situation you describe. Haven't yet. I think I'll put it up on my secondary DNS server so I can test it at my leisure. Probably will use FC 6 when it is released soon then once it is working satisfactorily, make it primary then upgrade my current primary. Yes, I am running FC in a commercial environment. It, afterall is the descendent of Redhat Linux 9 and that was fantastic as long as security updates were being produced. -- Paul A. Franz Blackdog Motor Freight Office 425.641.8202 FAX 425.641.1773 Cell 425.241.1618 ------------------------------------------------------------------------- Take Surveys. Earn Cash. 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