Date: Mon, 10 Oct 2005 01:31:03 -0500 (CDT) From: Mike Silbersack <silby@silby.com> To: Olivier Nicole <on@cs.ait.ac.th> Cc: freebsd-net@freebsd.org Subject: Re: SYN limit Message-ID: <20051010012831.G60693@odysseus.silby.com> In-Reply-To: <200510100622.j9A6MMbW014091@banyan.cs.ait.ac.th> References: <200510100622.j9A6MMbW014091@banyan.cs.ait.ac.th>
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On Mon, 10 Oct 2005, Olivier Nicole wrote: > For some reason, it seems that the MySQL server only accepts 50 > connections to the same resource comming from the same client at one > given time. 50 other connections are in SYN_SENT state. > > Any reason why this limit? FreeBSD has no SYN rate limit, but you could be running into TIME_WAIT recycling issues. Run a netstat on both the client and server, see if the port numbers match. For example, see if the client is trying to connect to port 3549 and the server has a TIME_WAIT socket on port 3549. The connection is supposed to recycle, but under certain conditions it might not... After doing that, try setting net.inet.ip.portrange.randomized=0 and see if the problem clears up at all. Mike "Silby" Silbersack
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