# SSL session cache

**URL:** <https://www.ruby-forum.com/t/ssl-session-cache/208392>\
**Category:** NGINX\
**Created:** [June 17, 2011, 12:48am UTC](https://www.ruby-forum.com/t/ssl-session-cache/208392 "2011-06-17T00:48:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\
**Post date:** [June 17, 2011, 12:48am UTC](https://www.ruby-forum.com/t/ssl-session-cache/208392/1 "2011-06-17T00:48:50Z")

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Increasing the ssl\_session cache from 10 to 30mins, would cause less  
cpu? (getting around 200 ssl hits/per min)

ssl\_session\_cache shared:SSL:10m;  
ssl\_session\_timeout 10m;

to:  
ssl\_session\_cache shared:SSL:30m;  
ssl\_session\_timeout 10m;

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [June 17, 2011, 10:03am UTC](https://www.ruby-forum.com/t/ssl-session-cache/208392/2 "2011-06-17T10:03:07Z")

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Hello!

On Fri, Jun 17, 2011 at 10:48:07AM +1200, Ryan B wrote:

> Increasing the ssl\_session cache from 10 to 30mins, would cause less  
> cpu? (getting around 200 ssl hits/per min)
> 
> ssl\_session\_cache shared:SSL:10m;  
> ssl\_session\_timeout 10m;
> 
> to:  
> ssl\_session\_cache shared:SSL:30m;  
> ssl\_session\_timeout 10m;

“30m” isn’t “30mins” here, but 30 megabytes for session storage  
instead. In 10m about 40000 sessions may be stored, and this is  
much more than you have hits per hour. So this particular change  
isn’t going to cause any visible effect.

Maxim D.