Article ID: 124071, created on Dec 27, 2014, last review on Dec 27, 2014

  • Applies to:
  • Plesk 12.0 for Windows
  • Plesk 11.5 for Windows
  • Plesk 10.4 for Windows


High load on the server. The operations hang or it takes too long to execute.


Identify the exact domain causing high CPU load: open IIS > server_name > IIS > Worker Processes. Depending on the result, apply one of the following:

  1. If the issue is caused by application pool exclusively used by Plesk, please, contact Parallels Technical Support, as additional investigation is required.

  2. If the issue is caused by application pool of a client's website, the case falls out of Parallels Technical support scope. It is recommended to contact system administrator regarding the issue.


Limit CPU usage for application pool of the domain, following instructions from the article.

Search Words

high CPU load

w3wc.exe CPU load

Plesk not listening

HTTP Error 503.0 - Service Temporarily Unavailable

IIS CPU load

ed7be2b984f9c27de1d2dc349dc19c6d 56797cefb1efc9130f7c48a7d1db0f0c a914db3fdc7a53ddcfd1b2db8f5a1b9c 85a92ca67f2200d36506862eaa6ed6b8 a766cea0c28e23e978fa78ef81918ab8 46a8e394d6fa13134808921036a34da8 bd7fc88cf1b01f097749ae6f87272128 ff5a00b8ead2e480367b019417a04207 c796c01d6951fa24ed54c7f1111667c6

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