Kernel parameter
# Get kernel parameter value $ sysctl vm.max_map_count vm.max_map_count = 65530 # Update kernel parameter $ sysctl -w vm.max_map_count=262144 vm.max_map_count = 262144
User limits
Session
# Get user limit values $ ulimit -n -f -u open files (-n) 4096 file size (blocks, -f) unlimited max user processes (-u) 1024 # Update user limits $ ulimit -n 65536 -f unlimited -u 4096
Process
$ prlimit -u -n -f --pid <pid> RESOURCE DESCRIPTION SOFT HARD UNITS NPROC max number of processes 4096 4096 NOFILE max number of open files 65536 65536 FSIZE max file size unlimited unlimited blocks $ cat /proc/<pid>/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 4096 4096 processes Max open files 65536 65536 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 15078 15078 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us
System
To change the user limits you can edit the /etc/security/limits.conf file or /etc/security/limits.d/*.conf, as an example:
#<domain> <type> <item> <value> collibra soft nproc 4096 collibra hard nproc 4096 collibra soft nofile 65536 collibra hard nofile 65536 collibra soft fsize unlimited collibra hard fsize unlimited
Tip
It is possible that an upgrade fails due to issues with these settings. In that case, add the same configuration lines as in the above example, but replace collibra by the user account that is executing the upgrade.
Error message excerpt:
Maximum file descriptors [4096] for Search is too low, increase to at least [65536]. ...
Daemon/services
| Daemon | Specification |
|---|---|
| systemd |
systemd configuration file: ... [Service] ... LimitNOFILE=65536 LimitNPROC=4096 LimitFSIZE=unlimited ... |
| upstart |
upstart configuration file: ... limit nofile 65536 65536 limit nproc 4096 4096 limit fsize unlimited unlimited exec ... |
| System V | System V services inherit the user limits. |