<div dir="ltr"><div dir="ltr">I am seeing the same log entries and have experienced a very similar consumption problem about once a month. At the onset of the problem, there is a short spike in CPU usage, then the CPU usage goes to nearly 0, but the load-average stays near 2x the number of VCPUs. After about 20~30 minutes, the server becomes completely unresponsive, and I'm forced to reboot via the AWS console. Some painfully obtained observations indicated that all available network and file resources were being consumed at this point. After a couple occurrences, I noticed in AWS CloudWatch metrics that the EFS volume (Elastic File System, i.e. basically NFS) spiked to 100% throughput at nearly the same time as the short spike in CPU usage and stayed there. My solution was to increase the volume's provisioned throughput to 10 Mbps, and I have not experienced the issue since, although I am still seeing the log entries you mention. My conclusion is that nginx unit was consuming massive amounts of network and file system resources and "choking" the server. This is obviously not a long-term solution, though, as there's no reason for such a massive amount of EFS volume throughput for a Wordpress application.<div><div><br></div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="font-size:12.8px"><font color="#000000" face="arial, helvetica, sans-serif" size="1"><b><br>Travis Warlick</b><br><b>Manager, Development Operations</b><br></font></p><p style="font-size:12.8px"><font color="#000000" face="arial, helvetica, sans-serif"><b>maxmedia</b><br></font><font color="#999999" face="arial, helvetica, sans-serif" size="1"><a href="https://www.maxmedia.com/" target="_blank"><font color="#999999">www.maxmedia.com</font></a><br></font></p><p style="font-size:12.8px"><span style="color:rgb(153,153,153);font-family:arial,helvetica,sans-serif;font-size:x-small">Find us on: </span><a href="https://www.linkedin.com/company/maxmedia/" target="_blank" style="font-family:arial,helvetica,sans-serif;font-size:x-small"><font color="#999999">LinkedIn</font></a><span style="color:rgb(153,153,153);font-family:arial,helvetica,sans-serif;font-size:x-small"> | </span><a href="https://twitter.com/maxmedia_atl" target="_blank" style="font-family:arial,helvetica,sans-serif;font-size:x-small"><font color="#999999">Twitter</font></a><span style="color:rgb(153,153,153);font-family:arial,helvetica,sans-serif;font-size:x-small"> | </span><a href="https://www.facebook.com/MaxMediaATL" target="_blank" style="font-family:arial,helvetica,sans-serif;font-size:x-small"><font color="#999999">Facebook</font></a><span style="color:rgb(153,153,153);font-family:arial,helvetica,sans-serif;font-size:x-small"> | </span><a href="https://www.instagram.com/maxmedia_atl/" target="_blank" style="font-family:arial,helvetica,sans-serif;font-size:x-small"><font color="#999999">Instagram</font></a><span style="color:rgb(153,153,153);font-family:arial,helvetica,sans-serif;font-size:x-small"> | </span><a href="https://vimeo.com/mxm" target="_blank" style="font-family:arial,helvetica,sans-serif;font-size:x-small"><font color="#999999">Vimeo</font></a><br></p>
</div>
</div></div></div></div></div><br><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 22, 2019 at 11:01 AM Peter TKATCHENKO <<a href="mailto:peter@bimp.fr">peter@bimp.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Hello,</p>
<p>I'm using Unit to publish a PHP application (NextCloud). I am on
FreeBSD 11.2 (jailed), I use PHP 7.2 from packages. There is an
NGINX server as front-end.<br>
</p>
<p>When I check Unit logs I see many records like this:</p>
<p><font size="-1"><tt>2019/05/16 12:44:39 [info] 88085#101952
*73260 shutdown(177, 2) failed (57: Socket is not connected)</tt></font><br>
</p>
<p>And sometimes like this:</p>
<p><font size="-1"><tt>2019/05/16 12:53:39 [alert] 88085#101951
*74551 socket close(177) failed (54: Connection reset by peer)</tt></font><br>
</p>
<p>The application seems to work correctly, but I would like to
understand the cause of these errors, probably I need to tune
something?</p>
<p>Another problem is more important. Sometimes (once a week) 'unit:
router' process begins to consume 100% of 4 VCPU (!!), it takes
about 15 minutes to grow the CPU usage, and finish by blocking
completely the application ('bad gateway' error on nginx). Restart
of unitd service solves the problem. I see many errors of the
first type in logs at this moment, but nothing more interesting.<br>
</p>
<p>Best regards,</p>
Peter TKATCHENKO
</div>
_______________________________________________<br>
unit mailing list<br>
<a href="mailto:unit@nginx.org" target="_blank">unit@nginx.org</a><br>
<a href="https://mailman.nginx.org/mailman/listinfo/unit" rel="noreferrer" target="_blank">https://mailman.nginx.org/mailman/listinfo/unit</a></blockquote></div></div>