Date: Sun, 19 Sep 1999 00:20:12 -0500 (CDT) From: Mohit Aron <aron@cs.rice.edu> To: freebsd-hackers@freebsd.org, freebsd-net@freebsd.org Subject: limit on number of sockets by zone allocator Message-ID: <199909190520.AAA20766@cs.rice.edu>
next in thread | raw e-mail | index | archive | help
Hi, I was recently doing some throughput tests with the Apache webserver on FreeBSD-4.0. It seems that the recently introduced (after FreeBSD-2) zone allocator limits the maximum number of socket structures to about 8000 (I configured my kernel with 256 MAXUSERS). A busy webserver can have about 50000 connections primarily due to TCP's TIME-WAIT state (see http://cs-tr.cs.rice.edu/Dienst/UI/2.0/Describe/ncstrl.rice_cs/TR99-335/). A limit of 8000 on socket descriptors would thus prevent a webserver from achieving full throughput. Perhaps the maxsockets variable defined in sys/uipc_socket2.c should be increased. - Mohit To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199909190520.AAA20766>