Sorry I didn't reply sooner - I was away sick last week, and I'm only
just getting back into things at work...
I've just tested Alex's patch, and first impressions are good - I've
set max-pending-requests to 400, and I can swamp Kannel on our test
server (~500 MOs/sec and ~180 MTs/sec) with no errors at all! I'm
going to do some more tests with different values of max-pending-
requests, to see how that affects performance, and try on some newer,
faster hardware as well, but at this point, I'm satisfied the patch
has resolved our issue.
Thanks Alex!
My only suggestion is to change the default value for max-pending-
requests to a value below 1024, simply because the default max open
files for a Linux process (at least in RHEL and Fedora Core) is 1024
- and smsbox already uses up some file descriptors for other stuff,
further limiting the number of concurrent HTTP connections. With max-
pending-requests set to 1024, we encounter the original 'too many
open files' problem. Not sure what the best value would be, but
without a better idea, I'd suggest a default like 512 or something?
Stipe, I assume you still want me to write up a detailed bug report
to keep a record of this?
Cheers,
On 28/08/2006, at 10:14 AM, Stipe Tolj wrote:
Alexander Malysh wrote:
Hi,
attached patch is a try to fix too much open filedescriptors when
handling MO/DLR in smsbox.
Patch adds new config option to smsbox group 'max-pending-
requests'. If no option given max-pending-requests is set to 1024.
This is resonable value for open filedescriptors.
Patch is really simple, we initialize semaphore with max-pending-
requests and just call down before http request starts and up if
it completed. The same down and up we call before and after popen
starts/completed.
Please comment this patch.
@Giulio: have you tested Alex's patch? what are the effects on the
same tests you did before?
Stipe
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