# Suggestions regarding number of connections **URL:** \ **Category:** NGINX\ **Created:** [October 21, 2011, 6:15pm UTC](https://www.ruby-forum.com/t/suggestions-regarding-number-of-connections/213053 "2011-10-21T18:15:04Z")\ **Posts on this page:** 3\ **Page:** 1
**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:** [October 21, 2011, 6:15pm UTC](https://www.ruby-forum.com/t/suggestions-regarding-number-of-connections/213053/1 "2011-10-21T18:15:04Z")
Currently we have a single Nginx web sever connecting to a pool of PHP app servers. The response from the application layer (PHP / DB) is excellent, but our site load times are not great. We’ve run some analytical tools and the network / web server response time is where a significant bottleneck exists. In working with our managed hosting company on this issue, we ran the following shell commands. I was wondering if someone could give me an idea if these numbers are indicative of a configuration issue with OS and / or Nginx OR will more CPU power help with this problem OR maybe we need to load balance the traffic to another web server. Should Nginx be able to handle this kind of traffic in general? Is there something that can be done in terms of Nginx configuration or OS configuration that can improve this issue (i.e. \> 7,000 connections waiting)? root@server1 [~]# netstat -anp | grep ‘:80’ | grep ESTABLISHED -c 4785 Over 4000 current connections. root@server1 [~]# netstat -anp | grep ‘:80’ | grep -i WAIT -c 7982 7000 Connections in waiting for data state. root@server1 [~]# netstat -anp | grep ‘:80’ | grep -i SYN -c 280 Posted at Nginx Forum: > **[Suggestions regarding number of connections](https://forum.nginx.org/read.php?2,217026,217026#msg-217026)** > > Currently we have a single Nginx web sever connecting to a pool of PHP app servers. The response from the application layer (PHP / DB) is excellent, but our site load times are not great. We've run some analytical tools and the network / web server... ---
**Author:** ![iberkner](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c67d28/32.png) [@iberkner](https://www.ruby-forum.com/u/iberkner)\ **Post date:** [October 22, 2011, 2:33am UTC](https://www.ruby-forum.com/t/suggestions-regarding-number-of-connections/213053/2 "2011-10-22T02:33:36Z")
I’ve seen an nginx server handle around 1 million concurrent connections. Set ulimit and do basic tcp tuning is generally good enough. ---
**Author:** ![iberkner](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c67d28/32.png) [@iberkner](https://www.ruby-forum.com/u/iberkner)\ **Post date:** [October 22, 2011, 4:12am UTC](https://www.ruby-forum.com/t/suggestions-regarding-number-of-connections/213053/3 "2011-10-22T04:12:28Z")
That’s what I’m trying to understand. Could you give me some more specific examples of what to look for? On Fri, Oct 21, 2011 at 8:32 PM, Brian A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I’ve seen an nginx server handle around 1 million concurrent connections. > Set ulimit and do basic tcp tuning is generally good enough. > > * * * > > nginx mailing list > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > [mailman.nginx.org archive](http://mailman.nginx.org/mailman/listinfo/nginx) – Ilan B. Chief Technology Officer > **[Online Homeschool Curriculum from Time4Learning](https://www.time4learning.com/)** > > PreK-12 homeschooling is EASY with Time4Learning at your fingertips with award-winning online lessons, and parent-friendly planning and reporting tools. 6300 NE 1st Ave., Suite 203 Ft. Lauderdale, FL 33334 (954) 771-0914 [http://www.twitter.com/time4learning](http://www.twitter.com/time4learning) [http://www.facebook.com/Time4Learning](http://www.facebook.com/Time4Learning) [Time4Learning.com](http://Time4Learning.com) - Online interactive curriculum for home use, PreK-8th Grade. [Time4Writing.com](http://Time4Writing.com) - Online writing tutorials for high, middle, and elementary school students. [Time4Learning.net](http://Time4Learning.net) - A forum to chat with parents online about kids, education, parenting and more. [spellingcity.com](http://spellingcity.com) - Online vocabulary and spelling activities for teachers, parents and students.