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I'm running Craft on our shared hosting with PHP 7.2. No SSD. Performance is fine, but working in the backend, I often get hickups of several seconds (!), where nothing happens, everything stalls.

Here's what cPanels resources diagram tells us:

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So ... something with I/O and I/O Faults.

Could this be solved without changing the hosting?

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    Having you tried contacting your host to let them know what you're seeing? Shared hosting is tricky because you're contenting for resources (including disk I/O) with every other site that is hosted on that box. – Brad Bell Aug 24 '18 at 22:52
  • Is the I/O thing a particularity of twig, yii, craft? Does it write a lot of files? – Urs Aug 25 '18 at 7:01
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    Not really? 99% of Craft's/Twig's writing on any given request will be in craft/storage/runtime. – Brad Bell Aug 28 '18 at 5:45
  • Since the hoster raised the I/O limits, it's been going well. Still testing, but it looks like 2MB/s are required to avoid these timeouts – Urs Sep 3 '18 at 11:34

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