Title: 100% CPU usage
Last modified: October 6, 2016

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# 100% CPU usage

 *  Resolved [DmitrySh](https://wordpress.org/support/users/dmitrysh/)
 * (@dmitrysh)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/100-cpu-usage-2/)
 * Hi
    Thank you for plugin. I have VDS server with 4 core processor, RAM 4 GB. 
   It has 100% CPU usage with 250 online users and 15 second refresh time. Is this
   normal situation? Is there way to optimise processor loading with this refresh
   time?
 * Thanks, Dmitry

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Marcin](https://wordpress.org/support/users/marcinlawrowski/)
 * (@marcinlawrowski)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/100-cpu-usage-2/#post-8351824)
 * Hi,
 * Thank you for your feedback. Are you sure Wise Chat is causing this? Check if
   Lightweight engine is enabled. You can also limit the number of users in your
   channels.
 * Ajax powered chat plugins are easy to install and maintain, but sometimes demand
   higher resources on the server. This is caused by the technology and not by Wise
   Chat itself.
 * Best regards
    Marcin
 *  Thread Starter [DmitrySh](https://wordpress.org/support/users/dmitrysh/)
 * (@dmitrysh)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/100-cpu-usage-2/#post-8353777)
 * Hi Marcin,
 * I use Lightweight AJAX. Yesterday i had 60% CPU usage with 60 users and 1min 
   refresh time. The reason of high CPU usage is Wise chat (Ajax powered technology),
   because it happens only when chat is opening. Do you have data of stress testing?
 * Thanks, Dmitry
 *  Plugin Author [Marcin](https://wordpress.org/support/users/marcinlawrowski/)
 * (@marcinlawrowski)
 * [9 years, 6 months ago](https://wordpress.org/support/topic/100-cpu-usage-2/#post-8447493)
 * Unfortunately, I don’t have such data at the moment for Wise Chat. As I said,
   Ajax-powered chats require more resources than WebSocket-powered chats. This 
   is just a nature of Web and how it works.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘100% CPU usage’ is closed to new replies.

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 * 3 replies
 * 2 participants
 * Last reply from: [Marcin](https://wordpress.org/support/users/marcinlawrowski/)
 * Last activity: [9 years, 6 months ago](https://wordpress.org/support/topic/100-cpu-usage-2/#post-8447493)
 * Status: resolved