very slow website after upgrading to jooma 3.8.0

[Folamour]

hi folks, just upgraded to 3.8.0 and site is really slow up to 20 sec to load a page instead of 2.5 sec, joomla.fr website server is overloaded did you have any issue in uk ?

you can check the issue here https://www.crashdebug.fr

we have also error on database as reported by 404 fix error, my mailbox receive tons of error.

jotcache is fixing the problem for page in cache, just navigate to other page to saw the issue.

thanks a lot

f.

[itoctopus]

Are you seeing any load on the database server? If yes, can you enable the slow queries flag in your my.cnf configuration file and post back the slow queries here?

[Folamour]

no load on the database, only cpu and very web page load,

thanks for your help,

[itoctopus]

The CPU load is caused by the database load. Please enable slow query logging.

[Per Yngve Berg]

The cached content is probably invalidated. It takes CPU to rebuild it.

[Folamour]

cache as been empty have restored a backup, good luck with other user, feel free to close that thread

[kbgorman]

I, too, experienced a very slow website after the update to Joomla 3.8 at about 9:30 am on 9-20-17. I contacted my webhost, IXwebhosting, (I have a cloud account) and they responded:

"I have rechecked your server and found that the load on your server is higher than usual, which results in overall server slowness. The load on the server started today approximately at 09:30 AM. The most load comes from the civilwarrichmond.com website.
While monitoring the server I notice that MySQL server makes long requests to 'civilwar_richmond' database, some of them took 5 seconds, which is a lot for the MySQL. At the same moment, the civilwarrichmond.com error log doesn't indicate any errors."

I restored my website back to Joomla 3.75 and all is good again.

[Folamour]

We are also on roll back 3.7.5 all work fine since 24h, will wait 3.8.1 update, thanks for the feed back, one of our particularity is to host 14k articles.