[SR-Users] Log levels severely impacts performance
amit at brytecall.com
Fri Sep 16 14:13:41 CEST 2022
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
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.
From: sr-users <sr-users-bounces at lists.kamailio.org> on behalf of Alex Balashov <abalashov at evaristesys.com>
Date: Thursday, September 15, 2022 at 11:00 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Subject: Re: [SR-Users] Log levels severely impacts performance
> On Sep 15, 2022, at 10:54 PM, Amit <amit at 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`?
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.
 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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