16 Sep
2022
16 Sep
'22
10:39 p.m.
Hi Henning,
That’s just it. We don’t see any IO wait increases during the test case. I’ve only seen it
briefly go to %0.13 and then right back to %0.00
I heard there are ways to time or benchmark different parts of the config. Can you point
me in the right direction to perform some logging benchmark tests?
Amit
On Sep 16, 2022, at 8:32 AM, Henning Westerholt <hw(a)gilawa.com> wrote:
Hello,
then have a look to the server stats and IO load during the test case when you observe the
particular blocking issues. You should be able to see something then, if its caused from
the Kamailio logging to syslog.
Cheers,
Henning
--
Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com<https://gilawa.com/>
From: sr-users <sr-users-bounces(a)lists.kamailio.org> On Behalf Of Amit
Sent: Friday, September 16, 2022 2:14 PM
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Subject: Re: [SR-Users] Log levels severely impacts performance
Hi Alex,
Thanks for your suggestions.
Yes we’ve tested the underlying storage. We specifically upgraded drives on the particular
testing server I am using at the moment, and are using a ZFS volume.
But to answer your specific questions,
# hdparm -t /dev/sda2
/dev/sda2:
Timing buffered disk reads: 4118 MB in 3.00 seconds = 1372.43 MB/sec
Also, %iowait remains at 0. I did see it briefly go to %0.13 for one cycle when I sent
2000 simultaneous registrations to Kam.
It doesn’t appear to be the disk subsystem.
Amit
From: sr-users
<sr-users-bounces@lists.kamailio.org<mailto:sr-users-bounces@lists.kamailio.org>>
on behalf of Alex Balashov
<abalashov@evaristesys.com<mailto:abalashov@evaristesys.com>>
Date: Thursday, September 15, 2022 at 11:00 PM
To: Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org<mailto:sr-users@lists.kamailio.org>>
Subject: Re: [SR-Users] Log levels severely impacts performance
On Sep 15, 2022, at 10:54 PM, Amit
<amit@brytecall.com<mailto:amit@brytecall.com>> wrote:
I’ve already added the “-“ in front of the log file and that didn’t seem to make any
recognizable difference.
That’s the only place that I know.
Have you tested your storage throughput? Even something as simple as `hdparm -t
/dev/sda`[1]?
What about monitoring background I/O demand, i.e. `iostat -x 1`? Look at the %util on the
drive being written to.
I know you said your log isn’t being written to the local disk, but other storage activity
could still be pushing up your I/O base load.
— Alex
[1] Replace `/dev/sda` with your actual storage device.
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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