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Website very slow since last week

Posted: Mon Nov 24, 2014 2:23 pm
by bartonline
Since last week a website for a client is very slow in frontend and backend and give sometimes timeouts.

And there are many queries in table _session.

What could be the cause?

Re: Website very slow since last week

Posted: Mon Nov 24, 2014 5:46 pm
by sitesrus
A lot of people visiting the site...user's visit the site and get sessions.

If you have a website for a client, and you don't know how to analyze/trouble shoot this...what are you doing making sites for clients?

Make a test site copy and in the test site turn on error reporting/notices, joomla debug to see memory consumption and loads times of various pages after rendered. Investigate number of third party extensions installed and running. Check number of users total and use google analytics or webalizer to check stats for visits and see if your site is getting hammered.

Review slow query log and if slow queries isn't on turn it on, than turn it off when you're done.

What type of hosting is this and if it's shared is it good hosting? You only get X amount of resources/connections on shared hosting so if too many people visit some people's connections will freeeze waiting to connect or get axed completely and if there's not enough resources to generate the site like memory it will cause problems too. PHP get's compiled over and over when people visit the site so too many visits means too much CPU/memory utilization and shared provider will cut you off.

Amazon web services or VPN's/dedicated servers are better. Turn on caching in Joomla, make sure site is compressed and optimized and use a CDN if possible. Relieve burden on the server, check out cloudflare free plan.

Make sure no one is using DOS attacks or you don't have malicious scripts uploaded by accident either.

Educate yourself as well, you should know these things!

Re: Website very slow since last week

Posted: Thu Nov 27, 2014 2:15 pm
by sitesrus
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Re: Website very slow since last week

Posted: Thu Nov 27, 2014 2:53 pm
by bartonline
Problem solved, it was a hack.