# How to set the minimum size of the cache file **URL:** \ **Category:** NGINX\ **Created:** [September 16, 2009, 7:21am UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593 "2009-09-16T07:21:25Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [September 16, 2009, 7:21am UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/1 "2009-09-16T07:21:25Z")
Hi, How to set the minimum size of the cache file ? 2009-09-16 Chancey ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [September 16, 2009, 11:22am UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/2 "2009-09-16T11:22:33Z")
On Wed, Sep 16, 2009 at 01:07:05PM +0800, Chancey wrote: > How to set the minimum size of the cache file ? Currently there is no way. Could you tell why do you want to set this limit ? ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [September 16, 2009, 12:05pm UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/3 "2009-09-16T12:05:17Z")
Back-end to provide search suggest services . Example: Two request url: a . [http://xxx/a?q=a](http://xxx/a?q=a) b . [http://xxx/a?q=b](http://xxx/a?q=b) Response results : a. xxxxxxxxxx b. null The results of a need to be cached , b don’t need. Because there are a large number of fruitless requests , If b is the cache will appear the following situations : 1 . Caching a lot of useless information, resulting in a waste of disk space 2 . Very high Disk IO load cause the system to slow Search services have their own caching mechanism , but I would like to omit the PHP parsing process, will get better performance Sorry,my english is so poor that i don’t know whether a clear expression. 2009-09-16 Chancey 发件人： Igor S. 发送时间： 2009-09-16 17:15:32 收件人： nginx 抄送： 主题： Re: How to set the minimum size of the cache file On Wed, Sep 16, 2009 at 01:07:05PM +0800, Chancey wrote: > How to set the minimum size of the cache file ? > Currently there is no way. > Could you tell why do you want to set this limit ? > – > Igor S. > [Igor Sysoev](http://sysoev.ru/en/) ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [September 16, 2009, 4:07pm UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/4 "2009-09-16T16:07:03Z")
It’s a good idea, I have set it successful. Thank you very much! 2009-09-16 Chancey 发件人： MirosÅ‚aw Jaworski 发送时间： 2009-09-16 18:41:17 收件人： nginx 抄送： 主题： Re: Re: How to set the minimum size of the cache file On Wed, 2009-09-16 at 17:56 +0800, Chancey wrote: > a. xxxxxxxxxx > b. null > > The results of a need to be cached , b don’t need. > You can run nginx without caching enforcement ( don’t use > proxy\_cache\_valid ) and modify(_) “search suggest service” so it will > return headers allowing caching for responses other that null. > (_) very likely modification is adding single line of code setting > “Expire:” header before returning result. – MirosÅ‚aw “Psyborg” Jaworski GCS/IT d- s+:+ a C++$ UBI++++$ P+++$ L- E— W++(+++)$ N++ o+ K- w-- O- M- V- PS+ PE++ Y+ PGP t 5? X+ R++ !tv b++(+++) DI++ D+ G e\* h++ r+++ y? “Never let your sense of morals get in the way of doing what’s right.” ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [September 16, 2009, 12:45pm UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/5 "2009-09-16T12:45:41Z")
On Wed, 2009-09-16 at 17:56 +0800, Chancey wrote: > a. xxxxxxxxxx > b. null > > The results of a need to be cached , b don’t need. You can run nginx without caching enforcement ( don’t use proxy\_cache\_valid ) and modify(\*) “search suggest service” so it will return headers allowing caching for responses other that null. (\*) very likely modification is adding single line of code setting “Expire:” header before returning result. ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [April 13, 2010, 11:18am UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/6 "2010-04-13T11:18:28Z")
Igor S. wrote: > On Wed, Sep 16, 2009 at 01:07:05PM +0800, Chancey wrote: > > > How to set the minimum size of the cache file ? > > Currently there is no way. > Could you tell why do you want to set this limit ? Hi Igor, I have the same question. nginx is my reverse proxy cache servers, web page nginx cached was generated by backend php program, sometime when php fetch data from db server failed, it will generate the wrong page. the wrong page’s size always much smaller than the right page. if I can set the minimum size of the cache file, nginx will not cache the wrong page. thaks a lot. ``` yangchunyu ``` ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [April 13, 2010, 2:48pm UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/7 "2010-04-13T14:48:03Z")
On Tue, Apr 13, 2010 at 4:18 AM, Yahwist Y. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > page. > > thaks a lot. > > Â Â Â Â Â Â Â Â Â Â yangchunyu If something went wrong, shouldn’t your PHP be generating a 40x or 50x error code? Nginx doesn’t cache these by default. ## A third-party web application which returns a 20X code on errors is currently the bane of my existence. It just plain stinks for monitoring, log analysis, and just about anything else. If you have any influence over the back-end PHP code at all, I would change it to return proper error codes. RPM ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [April 13, 2010, 2:44pm UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/8 "2010-04-13T14:44:32Z")
On Tue, Apr 13, 2010 at 4:18 AM, Yahwist Y. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > page. > > thaks a lot. > > Â Â Â Â Â Â Â Â Â Â yangchunyu If something went wrong, shouldn’t your PHP be generating a 50x error code? Nginx doesn’t cache these by default. ## A webapplications that returns a 20X code on error are the bane of my existence at the moment. Do you control the back-end PHP code at all? RPM ---
**Author:** ![Chancey](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ec9cab/32.png) [@Chancey](https://www.ruby-forum.com/u/Chancey)\ **Post date:** [April 14, 2010, 1:03pm UTC](https://www.ruby-forum.com/t/how-to-set-the-minimum-size-of-the-cache-file/175593/9 "2010-04-14T13:03:03Z")
Ryan M. wrote: > On Tue, Apr 13, 2010 at 4:18 AM, Yahwist Y. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > wrote: > > > page. > > > > thaks a lot. > > > > Â Â Â Â Â Â Â Â Â Â yangchunyu > > If something went wrong, shouldn’t your PHP be generating a 50x error > code? Nginx doesn’t cache these by default. > > ## A webapplications that returns a 20X code on error are the bane of my existence at the moment. Do you control the back-end PHP code at all? > > RPM I have forwarded your good solutions to our programmer. the wrong page never be cached. thanks a lot ``` yangchunyu ```