servers that want to enable opCache should have higher ram or hdd or something?
Mehran Hadidi

It depends on how many ram is available, if you have a 512mb ram server, you should stick to a memory consumption of a round 64mb (default). If you have 1gb or more you can go up to 512mb (recommend) or more.

Disk space doesn’t matter much. In PHP 7 you can configure to use disk in combination with ram if you have a low ram server, but ram is always faster.

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