FYI - Using only the Plesk Interface! I think there is a bug with the default php max_execution_time within a subscription. It is set to 60 sec, but if looking at the actual phpinfo() you will find that the value is in fact 30 sec.
I went nuts about a timeout error only to find that the values in the php setting interface within a subscription are not the same as the default settings. Changing to a higher number 240 sec or so, does take hold. Type your value, don't use the pull down selector.
Related: the php timeout can manifest itself as "nginx 504 error: Connection timed out", or "fcgi timeout", or as "proxy timeout" errors - when it fact it is a simple php timeout error. This article http://kb.odin.com/en/120210 offers the wrong solution in my opinion. nginx is not the problem...
I went nuts about a timeout error only to find that the values in the php setting interface within a subscription are not the same as the default settings. Changing to a higher number 240 sec or so, does take hold. Type your value, don't use the pull down selector.
Related: the php timeout can manifest itself as "nginx 504 error: Connection timed out", or "fcgi timeout", or as "proxy timeout" errors - when it fact it is a simple php timeout error. This article http://kb.odin.com/en/120210 offers the wrong solution in my opinion. nginx is not the problem...