<div>Andy,</div><div><br></div>I had a similar problem with CentOS. mysqldump was stalling everything for a couple of minutes when it ran.<div><br></div><div>Saw some pretty epic query times popping up in NewRelic RPM around that time. The site just stalled for a few minutes.</div>
<div><br></div><div>Pingdom reported a minute or two of downtime.</div><div><br></div><div>-Tim<br><br><div class="gmail_quote">On 22 July 2011 11:25, Andrew Stewart <span dir="ltr"><<a href="mailto:boss@airbladesoftware.com">boss@airbladesoftware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hola El Rug,<br>
<br>
I have several Rails/Sinatra sites on a couple of RHEL VPSs. Almost every day for several months at least, almost all the sites drop off the web for 2-4 minutes. I know this because Pingdom notifies me at 4.30am.<br>
<br>
As you can imagine, it's annoying.<br>
<br>
Initially I thought this was caused by Passenger log rotation but, when I looked into it this morning, I realised the times don't match up. Here are some details:<br>
<br>
- Most sites go down most days.<br>
- The sites go down at 4.30am and are back up 2-4min later (Pingdom checks every minute).<br>
- The system cron runs its dailies, including logrotate, at 4.02am.<br>
- My crontab has nothing around 4.30am.<br>
- There's nothing in /var/log/cron around 4.30am.<br>
- There's nothing in the httpd error logs around 4.30am.<br>
- There's nothing in /var/log around 4.30am.<br>
<br>
Does anyone have any ideas?<br>
<br>
Thanks in advance,<br>
<br>
Andy Stewart<br>
<br>
-------<br>
<a href="http://airbladesoftware.com" target="_blank">http://airbladesoftware.com</a><br>
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</blockquote></div><br></div>