From owner-freebsd-hackers Tue Aug 21 12:43: 7 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from niwun.pair.com (niwun.pair.com [209.68.2.70]) by hub.freebsd.org (Postfix) with SMTP id 2F56137B436 for ; Tue, 21 Aug 2001 12:42:52 -0700 (PDT) (envelope-from silby@silby.com) Received: (qmail 83247 invoked by uid 3193); 21 Aug 2001 19:42:51 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 21 Aug 2001 19:42:51 -0000 Date: Tue, 21 Aug 2001 15:42:51 -0400 (EDT) From: Mike Silbersack X-Sender: To: Giorgos Verigakis Cc: Subject: Re: Zope's performance issues In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tue, 21 Aug 2001, Giorgos Verigakis wrote: > On Tue, 21 Aug 2001, Mike Silbersack wrote: > > I suspect that the reload time spiking is due to our initial sequence > > number generation scheme, which is currently shared with OpenBSD. This > > will be changing RSN, which will likely change how your benchmarks look. > > (They should look better after the change.) > > I don't understand. How is it related with the initial sequence number? > > > > > > I'm curious about the reload time, though. Is it really in seconds? What > > is it measuring? > > Yes it's in seconds. What I wanted to measure was the time a page needs to > be loaded, because the results I was getting were unexpectable. The current scheme causes problems with TIME_WAIT recycling, which may cause long delays in establishing new connections if you're connection to the same host rapidly enough to cause TIME_WAIT recycling to be an issue. This is why there's a huge spike only when you get to 1000 hits/second. There could be other reasons, of course, but this will overshadow the others. I tested your test program with apache, and the change is noticeable. So, hold off on further testing until later this week. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message