- You should increase
/proc/sys/kernel/pid_maxsysctl. Otherwise, execute the following command to check which app is forking multiple threads.
- Error “Cannot allocate memory” indicates that the system is running out of PID (process ids). In other words, the number of threads/processes present on the system has reached the maximum limit, which is delimited by /proc/sys/kernel/pid_max sysctl.
- You can check the value of pid_max on the system as follows:
- To set the value of pid_max, execute the following command as root.
sysctl -w kernel.pid_max=32768
kernel.pid_max = 32768
- The value can only be extended up to a theoretical maximum of 32768 for 32 bit systems or 4194304 for 64 bit.