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> on behalf of Alex Balashov <abalashov@evaristesys.com>
Date: Thursday, September 15, 2022 at 11:00 PM
To: Kamailio (SER) - Users Mailing List <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> 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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