Date: Sun, 03 Nov 2002 13:12:54 -0600 From: "J.D. Bronson" <lists@...c.com> To: popa3d-users@...ts.openwall.com Subject: Re: performance under solaris At 01:02 PM 11/3/2002, you wrote: >On Sun, Nov 03, 2002 at 07:25:09AM -0600, J.D. Bronson wrote: > > It is a little hard to describe, but basically when we use qpopper and > have > > a sizable mail spool file, it is 'popped' down very fast and continously > > flowing. > > > > However, with popa3d I see pauses (although not of any duration to > speak of) > > when grabbing this same exact mail spool file. grab-pause-grab-pause and > > so on... > >How long are the pauses? 1-2 seconds....enough to be noticed, but not enough to be a problem :-/ >What network equipment is in use between the server and the client? >What bandwidth? What client OS? 100MB/FD switches/cards. All on the same LAN segment. Clients run XP Pro. > > I was therefore wondering if there are any suggestions with buffer > > adjustments (?) or similar within the params.h file to improve my > > performance. > >Well, this sounds like a networking problem, so you may try one of the >following: > >1. Investigate and solve it. tcpdump may be helpful. You may post >some details in here (but please keep your message size under 10 KB), >such that me or others might be able to help. > >2. Try to workaround it by reducing buffer size to be under MTU. Set >RETR_BUFFER_SIZE to be less than half your MTU, say, to 700 bytes. >(The "less than half" is because content may be at worst doubled by >LF -> CRLF expansion.) This sounds interesting :) >You may first try the latter to confirm the problem as MTU-related, >then go for the former to really solve it. > >Of course, the smaller buffer size is less efficient. > >-- >/sd OTOH, since running spop3d or qpopper result in higher performance, I doubt there is anything on my network that needs fixing......:-/ However, I am presuming that these programs make use of something in a different manner than popa3d and hence I was wondering what tweaks (if any) are available to popa3d...if there is nothing, it was simply worth asking. I am satisfied with popa3d, but always looking for speed improvements. I am installing an xBSD machine and will test popa3d on there for a simple comparison. Some POP3 daemons fly on some OS's and others fail miserably with performance. Thanks for the reply... -- J.D. Bronson Aurora Health Care // Information Systems // Milwaukee, WI USA Office: 414.978.8282 // Fax: 414.328.8282 // Pager: 414.603.8282
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