On Mar 16, 2009, at 8:13 PM, Amos Jeffries wrote:
To elaborate, squid should restart new url_rewrite_program instances
when the number of live children falls to <= 50% of the configured
number. So once 8 processes out of 15 die, squid should launch a
whole
new set of 15. You'll then have 23 url_rewriter processes, but squid
will launch 15 more when they die and only 7 are left. The circle of
life continues...
PS: yes that is a known bug. Squid should only start the 8 dead ones
back.
It's on the queue for fixing one day.
In squid 2.7, if you don't want to wait for half your helpers to die
before squid launches more, you can adjust the threshold in
helper.c:helperServerFree() by changing the following line:
if (hlp->n_active <= hlp->n_to_start / 2) {
And changing the right size of the evaluation from "/ 2" to, say,
"* .
75" or similar.
This can be used as a somewhat ghetto way of dealing with a rewriter
that has a memory leak - put a dead-man's counter into the rewriter
that causes the process to exit after X number of requests, and let
squid launch new ones as needed. (Not that I've ever done anything
like that myself, nosiree...)
Hmm, inspiration for a new idea and explanation of a bug in one post.
Thank you very much.
Not a problem - I guess you can consider this a feature request to
make that threshold tunable in squid.conf :)
-C
Amos
-C
On Mar 15, 2009, at 5:14 AM, Amos Jeffries wrote:
Dieter Bloms wrote:
Hi,
I use an url_rewrite_program, which seems to die after about 400000
requests.
Squid starts 15 processes, which are enough, but after some time
one
process after another die and at the end all processes where gone.
Is it possible to let squid restart an url_rewrite_program, when it
dies ?
What version of Squid are you using that does not do this restart
automatically?
Squid only dies when ALL helpers for a needed service are dying too
fast to recover quickly.
Amos
--
Please be using
Current Stable Squid 2.7.STABLE6 or 3.0.STABLE13
Current Beta Squid 3.1.0.6
