Bug 26324

Summary:

Defaults for NFS mounts over TCP are slow

Product:

Base System

Reporter:

bg <bg>

Component:

kern

Assignee:

freebsd-bugs (Nobody) <bugs>

Status:

Closed FIXED

Severity:

Affects Only Me

CC:

Priority:

Normal

Version:

4.2-RELEASE

Hardware:

Any

OS:

Any

Attachments:

Description	Flags
file.diff	none

Description bg 2001-04-03 20:00:03 UTC

Defaults for NFSv3 mounts over TCP limits rsize and wsize to
8kbytes. This is unnecessarily conservative and leads to slow
NFS read/write performance.

NFSv3 has a mechanism to negotiate these parameters so there is no
danger in increasing the defaults to something more appropiate (e.g
sun defaults to 32kbytes).

Fix: The following patch increases NFS read and write performance between
two FreeBSD machines to ~80Mbytes/s. This was measured over an idle
100Mbit/s network.

Patch was tested on a FreeBSD 4.2-RELEASE machine.

Comment 1 silby freebsd_committer

2002-01-09 02:01:28 UTC

Responsible Changed
From-To: freebsd-bugs->dillon

Over to Mr.NFS, Dillon.

Comment 2 Giorgos Keramidas freebsd_committer

2003-02-23 02:15:47 UTC

Responsible Changed
From-To: dillon->freebsd-bugs

Back to the free pool.

Comment 3 David E. O'Brien freebsd_committer

2004-01-31 10:42:43 UTC

State Changed
From-To: open->closed

PR kern/62024 was committed.