<html><head></head><body>Hi, <br><br>We recently had a similar problem when we updated from 10.5.12 to 10.6.10.<br><br>The cause was that the default behavior changed from<br><br>innodb_flush_method = fsync<br><br>to<br><br>innodb_flush_method = O_DIREC<br><br>Which means, no kernel file caching.<br><br>If you have a too small <br><br>innodb_buffer_pool_size<br><br>in this case, there is a lot of disk I/O and thus a lot of CPU wait time.<br><br>Setting<br><br>innodb_buffer_pool_size = 8G<br><br>helped in our case.<br><br>Winfried<br><br><br><div class="gmail_quote">Am 26. November 2022 14:45:26 MEZ schrieb William Edwards via Pdns-users <pdns-users@mailman.powerdns.com>:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre dir="auto" class="k9mail">Hi,<br><br>Are people on this mailing list seeing increased CPU usage when using MariaDB 10.6.11 with PowerDNS 4.5.4?<br><br>Context:<br><br>I use PowerDNS with the gmysql backend. Last Wednesday, I upgraded MariaDB 10.6.10 to 10.6.11 on 8 machines running PowerDNS. Since then, MySQL's average CPU usage has increased from 2,5% to 55%. This happens on all upgraded machines. However, this issue does not occur on machines running MariaDB 10.6.11 without PowerDNS. PowerDNS itself was not upgraded.<br><br>I am aware that this issue is (most likely) not caused by PowerDNS. I am therefore only wondering whether others have seen the same behaviour. If so, that would save me some debugging time.<br><br>Thank you,<br><br>William Edwards<hr>Pdns-users mailing list<br>Pdns-users@mailman.powerdns.com<br><a href="https://mailman.powerdns.com/mailman/listinfo/pdns-users">https://mailman.powerdns.com/mailman/listinfo/pdns-users</a><br></pre></blockquote></div></body></html>