Thread (16 messages) 16 messages, 5 authors, 2009-12-28

Re: [PATCH] IPVS: Allow boot time change of hash size.

From: David Miller <davem@davemloft.net>
Date: 2008-12-02 22:51:29
Also in: lvs-devel

From: "Catalin(ux) M. BOIE" <redacted>
Date: Tue, 2 Dec 2008 08:34:22 -0700 (MST)
Hello, Joe!
quoted
On Fri, 28 Nov 2008, Catalin(ux) M. BOIE wrote:
quoted
Hello, Joe!

No, I did not measure it, but, I read the help text:
.
.
quoted
The help is wrong or I am missing something?
there's a bit somewhere else in the same section saying not
to change the hash size unless you know more than we do :-)
Where, exactly?

So, should I not change it at all even if I have a great number of
simultaneously connections?
You should only ever change something like this if you actually
observe a specific performance problem.

This is the part that is driving everybody crazy about your
report.  You seem to be changing this without having observed
a measurable performance problem first, and then tracked it down
specifically to this hash table's size.

You seem to want to change it because it seems to you like that is
what should be done.  You don't really know if it even matters or not
for your workload.
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help