Thanks alot dear Joel B. Laing. Is there any numerical relationship in finding out the disk I/O versus the number of users accessing their e-mails, consider there is nothing else running which might take disk resources? Best Wishes Sadi "Joel B. Laing" wrote: > Muhammad SaDaT Anwar wrote: > > > > Dear All! > > Greetings!! > > Just a quick question: > > What is the relation between number of users popping their e-mails and > > the disk I/O? > > > > Cheers! > > Sadi > > Disk performance is probably the most common bottleneck on a pop server. > Using fast drives and/or striping across multiple controllers, or using > fast hardware RAID are good ideas. You should run your favorite > monitoring tool (sar etc...) to check disk activity during heavy load. > If the disks are often at 100% busy, then you have I/O problems. > > The type of filesystem also affects performance on large spool > directories. Especially if you're using UFS, or ext2, ( non-journaled > type filesystems ) you should consider hashing the spool directories > into multiple spools. These spools could be spread across multiple > disks/controllers. UFS takes a performance hit searching for files in > large directories. > > Running server mode will greatly cut down on I/O. Check the INSTALL file > for details before you decide to use server mode. You should also > consider using a seperate drive/controller for the poptemp files. This > helps spread out I/O. > > Lots of ram also helps. > > -Joel
begin:vcard n:SaDaT;Muhammad Anwar tel;fax:1-561-7600172 tel;home:92-21-4983197 tel;work:92-21-5879733 x-mozilla-html:FALSE url:http://sadisuper.freehosting.net org:Supernet PDS Limited;Internet Technologies adr:;;E-14 Hassan Square Gulshan-e-Iqbal Block 13-A University Road.;Karachi;Sind;75300;Pakistan version:2.1 email;internet:[EMAIL PROTECTED] title:Systems Engineer Internet/Store & Forward Fax note;quoted-printable:My Web site =3D http://sadisuper.freehosting.net ******=0D=0AAOLScreenName=3Dsadisuper ****** =0D=0AYahooMessangerID=3Dsadisuper ******[EMAIL PROTECTED] ********=0D=0AIC QNumber&NickName=3D92776177 & sadisuper fn:Muhammad SaDaT Anwar end:vcard
