Date: Tue, 14 Apr 1998 05:20:28 -0400 (EDT) From: Open Systems Networking <opsys@mail.webspan.net> To: freebsd-hackers@FreeBSD.ORG Subject: BSDI window size sysctl wont stick Message-ID: <Pine.BSF.3.95.980414051535.6798E-100000@orion.webspan.net>
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I recently convinced my local ISP to change the window sysctl on their bsdi box from 8K to 16K for performance. Well it is now changed but tcpdump still shows the BSDI box using 8K window sizes. It's a sysctl so A reboot shouldn't be necessary correct? Is the window size hardcoded somewhere as well and a new kernel needs to be made? net.inet.tcp.sendspace = 16384 net.inet.tcp.recvspace = 16384 See there both set to 16K but there still using 8K windows. 04:17:42.626278 ip: well021.hit.net.3022 > horizon.hit.net.http: P 4261291271:4261291596(325) ack 3944625748 win 17376 <nop,nop,timestamp 358294 5754249> (DF) (ttl 64, id 51613) 04:17:43.084940 ip: horizon.hit.net.http > well021.hit.net.3022: P 3944625748:3944625921(173) ack 4261291596 win 8760 <nop,nop,timestamp 5754250 358294> (DF) (ttl 61, id 27682) ^^^^ I'm overlooking something. When you change the sysctl for send receive space on FreeBSD it takes effect immediately. On this BSDI 3.1 server when you change the sysctl mib it seems to have no effect. What is the deal here? Chris -- "I am closed minded. It keeps the rain out." ===================================| Open Systems Networking And Consulting. FreeBSD 2.2.6 is available now! | Phone: 316-326-6800 -----------------------------------| 1402 N. Washington, Wellington, KS-67152 FreeBSD: The power to serve! | E-Mail: opsys@open-systems.net http://www.freebsd.org | Consulting-Network Engineering-Security ===================================| http://open-systems.net -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.2 mQENAzPemUsAAAEH/06iF0BU8pMtdLJrxp/lLk3vg9QJCHajsd25gYtR8X1Px1Te gWU0C4EwMh4seDIgK9bzFmjjlZOEgS9zEgia28xDgeluQjuuMyUFJ58MzRlC2ONC foYIZsFyIqdjEOCBdfhH5bmgB5/+L5bjDK6lNdqD8OAhtC4Xnc1UxAKq3oUgVD/Z d5UJXU2xm+f08WwGZIUcbGcaonRC/6Z/5o8YpLVBpcFeLtKW5WwGhEMxl9WDZ3Kb NZH6bx15WiB2Q/gZQib3ZXhe1xEgRP+p6BnvF364I/To9kMduHpJKU97PH3dU7Mv CXk2NG3rtOgLTEwLyvtBPqLnbx35E0JnZc0k5YkABRO0JU9wZW4gU3lzdGVtcyA8 b3BzeXNAb3Blbi1zeXN0ZW1zLm5ldD4= =BBjp -----END PGP PUBLIC KEY BLOCK----- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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