Limit process memory usage per process

[Kevin Moran_1]

Currently, I have a unix process in production whereby the amount of data being loaded is about to exceed the maxdsiz kernel parameter setting. I really would only like to increase the memory limit for a specific process without enabling for all processes is there a way to do this? We are not using PRM.

[Bill Hassell]

This is quite easy. Set maxdsiz to a large value, perhaps 900 megs. Then in /etc/profile set ulimit to the number of kbytes you'd like as a limit for everyone as in:

ulimit -Sd 100000

(for 100 megs) Then for a specific process, start the process with ulimit -Sc 500000 so this one process gets to use 500 megs.

[Bill Hassell]

Oops, typo:

ulimit -Sd 500000

which sets maxdsiz to 500 megs temporarily.