# Thin server recently started hanging **URL:** \ **Category:** Deployment\ **Created:** [September 8, 2008, 2:29am UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983 "2008-09-08T02:29:01Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 2:29am UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/1 "2008-09-08T02:29:01Z")
I have been running nginx/thin for about a month now with no issues. For some reason today my first thin server on port 3000 has been sucking up all the cpu and a lot of memory and if you try a make a web request it either takes a very very long time to come back or times out. if i restart thin the server works for a bit but then has the same problem. thin has locked up at least 5 times today. i haven’t made any changes to the site and i can’t find any errors in the nginx, ruby production or thin logs. anyone have any ideas? thin 0.8.2 codename Double Margarita ruby 1.8.6 (2007-09-24 patchlevel 111) [x86\_64-linux] under ubuntu hardy 8.04 thanks! ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 3:56am UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/2 "2008-09-08T03:56:08Z")
Scott, How many thins do you have? What is the load average? How many request are hitting your site? – Aníbal Rojas > **[RUBYCORNER.COM](https://www.rubycorner.com/)** > > RUBYCORNER.COM - Contact us for any business inquiries > **[Home - Has Many Developers](https://hasmanydevelopers.com/)** > > We are the best choice for your building design and development [http://anibal.rojas.com.ve](http://anibal.rojas.com.ve) On Sun, Sep 7, 2008 at 7:59 PM, Scott K. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > the nginx, ruby production or thin logs. anyone have any ideas? > > > – Aníbal ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 5:08am UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/3 "2008-09-08T05:08:37Z")
Aníbal Rojas wrote: > Scott, > > How many thins do you have? > > What is the load average? > > How many request are hitting your site? > > – > An�bal Rojas > [http://rubycorner.com](http://rubycorner.com) > [http://hasmanydevelopers.com](http://hasmanydevelopers.com) > [http://anibal.rojas.com.ve](http://anibal.rojas.com.ve) > > On Sun, Sep 7, 2008 at 7:59 PM, Scott K. > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > the nginx, ruby production or thin logs. anyone have any ideas? > > > > > > > – > An�bal 2 thin clients with default settings. the load average is usually very low…definitely less than 1. when it has issues it gets up to 3 or 4. about 20,000 page views a day with an average of 25 users on at a time. i also tried switching to mongrel but i’m still having the same issues with the rails server hanging. i wonder if this means it is somehow related to nginx since i havent changed any of the rails code recently. ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 2:39pm UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/4 "2008-09-08T14:39:31Z")
Aníbal Rojas wrote: > VPS? Dedicated Server? How much RAM and CPU do you have? > > Take a look at log/production.log how much time does your app need to > service a request? Also check: > > - Look for a bottleneck at DB level (time spend in queries) > - Do you have any particular slow controller/action? > - Does the time required to service a request is short when > servicing a low number of request and grows a lot at peak moments? > > – > Aníbal > > On Sun, Sep 7, 2008 at 10:38 PM, Scott K. this is a 512MB RAM and 1024MB swap slice from [slicehost.com](http://slicehost.com). 4 64-bit AMD cpu’s. some of index views on controllers pages take .5 - 1 second to load. the weird thing is that now i can’t even get my web services to stay up for 10 minutes without it starting to timeout which makes me think something weird is going on. this site has been running for well over a month without any crashes. do you think this could be related to the hardware underlying on the virtual slice? the site is [wlodb.com](http://wlodb.com) if you want to take a look at how long it takes (unless i just restarted the services). how should i check how long the DB queries are taking? should i turn on verbose logging in mysql? I have on slow query logging but haven’t seen any today. thanks for the help so far! i have even tried to switch to a mongrel cluster but have the same results. ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 2:03pm UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/5 "2008-09-08T14:03:06Z")
VPS? Dedicated Server? How much RAM and CPU do you have? Take a look at log/production.log how much time does your app need to service a request? Also check: - Look for a bottleneck at DB level (time spend in queries) - Do you have any particular slow controller/action? - Does the time required to service a request is short when servicing a low number of request and grows a lot at peak moments? – Aníbal On Sun, Sep 7, 2008 at 10:38 PM, Scott K. ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 4:46pm UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/6 "2008-09-08T16:46:10Z")
Scott, > > On Sun, Sep 7, 2008 at 10:38 PM, Scott K. > > this is a 512MB RAM and 1024MB swap slice from [slicehost.com](http://slicehost.com). > > 4 64-bit AMD cpu’s. Does this slice also runs the database? > some of index views on controllers pages take .5 - 1 second to load. This is the problem, having request that take up to a second to be serviced is too much. You are getting a lot of queued requests. > the weird thing is that now i can’t even get my web services to stay up > for 10 minutes without it starting to timeout which makes me think > something weird is going on. this site has been running for well over a > month without any crashes. do you think this could be related to the > hardware underlying on the virtual slice? Your hardware should be fine for a moderated load (whatever “moderated” is) You need to pin point why your request are taking so long to be serviced. > the site is [wlodb.com](http://wlodb.com) if you want to take a look at how long it takes > (unless i just restarted the services). 🙂 > how should i check how long the DB queries are taking? should i turn on > verbose logging in mysql? I have on slow query logging but haven’t seen > any today. With INFO (default for production) you should be ok, look at this sample: Completed in 0.06489 (15 reqs/sec) | Rendering: 0.05481 (84%) | DB: 0.00109 (1%) | 200 OK [http://:/logi n] If things are OK, time spent on DB should be a little fraction of the total and rendering should take most of the time. You need to assure _at least_ a a dozen request per second (in my experience) to offer a smooth operation. > thanks for the help so far! You are welcome. > i have even tried to switch to a mongrel cluster but have the same > results. Thin and Mongrel, are architected in different ways. You real problem is the slow actions. You can try adding another thin/mongrel but while you have controller/actions taking up to a second to service a request you will be in trouble. – Aníbal ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 5:18pm UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/7 "2008-09-08T17:18:58Z")
ok thanks, i’ll take a look at optimizing the controllers that are performing slower. thanks for all the help! ---
**Author:** ![skirkpatrick](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/73ab20/32.png) [@skirkpatrick](https://www.ruby-forum.com/u/skirkpatrick)\ **Post date:** [September 8, 2008, 5:39pm UTC](https://www.ruby-forum.com/t/thin-server-recently-started-hanging/147983/8 "2008-09-08T17:39:10Z")
You are welcome, good luck – Aníbal Rojas > **[Home - Has Many Developers](https://hasmanydevelopers.com/)** > > We are the best choice for your building design and development > **[RUBYCORNER.COM](https://www.rubycorner.com/)** > > RUBYCORNER.COM - Contact us for any business inquiries [http://anibal.rojas.com.ve](http://anibal.rojas.com.ve) On Tue, Sep 9, 2008 at 10:48 AM, Scott K. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > ## ok thanks, i’ll take a look at optimizing the controllers that are performing slower. thanks for all the help! > > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). > > > – Aníbal