Hi Nigel, Thanks for your prompt reply. Can you please help me in clarifying some of my doubts?
1. What is the significance of setting MaxConnectionsPerChild to a value between 1-100 ? 2. What are the possible reasons for not setting MaxConnectionsPerChild to a high value, greater than 100 ? Thanks & Regards Arnav Garg From: Nigel B. Peck [mailto:[email protected]] Sent: Wednesday, August 21, 2019 11:51 AM To: [email protected] Subject: Re: [users@httpd] Apache process crashes, utilizing high memory On Mon, 19 Aug 2019 at 11:24 pm, Arnav Garg <[email protected]<mailto:[email protected]>> wrote: Hi All, I have an apache web server(v2.4) + ckan (v2.7.2) running in a docker container. In our scenario, CKAN is being hit with large number of requests at certain intervals (like 10 requests/sec). Then after a certain period of time, the memory consumption tends to increase towards it's threshold value. After a certain interval/time, if we access the home page of ckan at https://url-address/ckan with large number of request(Using Jmeter), the memory usage of the Apache process keeps on increasing and ultimately the process crashes and does not work properly. As a quick remedy for this, restarting the docker container reduces the memory usage. My concern is that, are there any set of conditions/parameters in Apache Webserver that needs to be taken care of to prevent this behavior. for eg: MaxConnectionPerChild or any other Parameter? Or is there any way to limit the memory consumption of Apache web server? Some of the values set in apache2.conf are: 1. Timeout 300 2. KeepAlive On 3. MaxKeepAliveRequests 100 4. KeepAliveTimeout 5 Also /apache2/mods-enabled/mpm_event.conf consists of the following parameters and values: 1. StartServers 2 2. MinSpareThreads 25 3. MaxSpareThreads 75 4. ThreadLimit 64 5. ThreadsPerChild 25 6. MaxRequestWorkers 150 7. MaxConnectionsPerChild 0 Thanks & Regards Arnav Garg Setting MaxConnectionsPerChild to something not too high (100 as a temporary fix?) should avoid you needing to restart your Docker container, sounds like you probably have a memory leak in your application that needs fixing. Nigel B. Peck Web Technologies and Linux Server Admin Mentor https://codementor.io/nigelbpeck ________________________________ The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NECTI or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NECTI or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately.
