Re: newbie question about polygraph

On Mon, 2006-09-18 at 03:11 +0700, samuel wrote:

> i'm testing my own proxy against polygraph simple.pg simulation. But
> there are some aspects that i don't understand after reading the User
> manual at
> http://www.web-polygraph.org/docs/reference/output/console.html .
>
> (1) (2) (3) (4) (5) (6) (7) (8) (9)
> 000.09| i-dflt 23 4.52 196 0.00 0 1
> 000.17| i-dflt 48 5.00 199 0.00 0 1
> 000.25| i-dflt 73 5.00 199 0.00 0 1
> 000.34| i-dflt 98 5.00 198 0.00 0 1
> 000.42| i-dflt 125 5.40 185 0.00 0 1
> The above output is copied from
> http://www.web-polygraph.org/docs/reference/output/console.html. On
> that page it is said that column 4 is "number of replies recieved so
> far (across all phases)". Right Now i'm experiencing this column value
> is very similar between a polyclt console and polysrv console, but
> polysrv 5th column (request rate) is much lower than polyclt. BTW i
> edited simple.pg with this line : "recurrence = 1% /
> SimpleContent.cachable;", so the 7th column (hit rate) on polyclt is
> always close to zero.
>
> My question is, what does this mean ? shouldn't it be that, if the 4th
> column on polysrv is similar to polyclt, then the 5th column should
> too ? Does this means my proxy overloaded ?

If you are looking at correlated numbers (i.e., stats taken at about the
same time), then the above sounds strange indeed. Could you email me the
console logs from both client and server sides? Also, have you tried to
generate the report using reporter? The reporter tool does correlation
for you: http://www.web-polygraph.org/docs/userman/reporting.html

> Also, i occasionaly get "connection closed before sending header"
> error on polyclt, does this means that when polyclt is trying to send
> a request to the proxy across a persistent connection, the proxy
> closed the connection?

Yes, it does. Please see
http://www.web-polygraph.org/docs/reference/output/messages.html#message:docs/reference/output/messages/errNoHdrClose

> Also (just wondering) is this kind of error only comes up at client
> console ? could it also appear on server console ?

If I read the code correctly, the error will be reported on the server
side if the HTTP client (including a proxy) closes the newly established
TCP connection without sending any data.

HTH,

Alex.
Received on Mon Sep 18 23:01:34 2006