mongodb : Increasing max connections in mongodb

Question

i need your help in solving this

this is the result of my ulimit -a on my linux server

   core file size          (blocks, -c) 0
schedu         


        

Answer 1

Method 1 If you use systemd (systemctl restart mongod)

sudo mkdir /etc/systemd/system/mongod.service.d/
sudo vi /etc/systemd/system/mongod.service.d/limits.conf

then add:

[Service]
LimitFSIZE=infinity
LimitCPU=infinity
LimitAS=infinity
LimitMEMLOCK=infinity
LimitNOFILE=64000
LimitNPROC=64000

Then execute:

systemctl daemon-reload
systemctl restart mongod

Method 2 If NO systemd (service mongod restart)

sudo vi /etc/security/limits.d/99-mongodb.conf

Add something like:

*       -       nproc   64000
*       -       nofile  64000
*       -       fsize   unlimited
*       -       cpu     unlimited
*       -       memlock unlimited
*       -       as      unlimited
*       -       rss     unlimited

Note that * it's a wildcard. But you could use a specific user or group. Then restart session and mongod.