On Thu, May 18, 2023 at 9:53 AM <chauhan.ram...@gmail.com> wrote: > > Requesting some sort of help with "Too Many open files". .I have seen several > post and even in these archives about too many open files..Details about > openldap installation. > Version - 2.4.59 > OS- RockyLinux 8 > Ldap is used by the coldfusion application for authentication. During normal > operation things are ok..but after some time or when a load of like 30 > concurrent users for a period of 5 mins are added, I get "Too Many Open > files" after the file descriptors reach 1024. What I have observed that post > the search result log. , the UNBIND and CLOSE on the connection at times > takes over 3 mins..and have see that there are over 1000 connections in > ESTABLISHED mode based on the lsof -i :ldap ...I have tried to set below > limits but to no avail..it still thows error post 1023 open FDs.. > * hard nofile 65535 > * soft nofile 65535 > * hard memlock 3000000 > * soft memlock 3000000 > * hard nproc 16000 > * soft nproc 16000 > * hard stack 512000 > * soft stack 512000 > > Have been able to increase the FDs as well by modifiying the slapd startup > script(changed the settings to 4096..it did reflect in monitor)..but after > some time the connection unbind and close calls are invoke more than 3 > mins...as compared to when the load is low..when it happens within few secs.. > Any help to make changes to ldap configuration or pointers how to go ahead > troubleshooting this would be really appreciated.
Also have a look at https://ro-che.info/articles/2017-03-26-increase-open-files-limit . It shows PAM and Systemd as additional suspects. 1024 sounds like the soft limit from Systemd: # My Ubuntu machine $ sudo systemctl show | grep -i file DefaultLimitNOFILE=524288 DefaultLimitNOFILESoft=1024 Jeff
