Deploying Iguana on Unix, Linux and Mac OS X

Memory Usage and Stack Size

If your Iguana server on Unix, Mac OS X or Linux is running a large number of channels and does not have much memory, you can reduce the server’s memory usage by changing the stack size on your system.

To view the current stack size, use the ulimit -a command. This command displays the limits and sizes that have been set for your system, including the stack size:

myUnixSystem:~ username$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) 6144
file size               (blocks, -f) unlimited
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 256
pipe size            (512 bytes, -p) 1
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 266
virtual memory          (kbytes, -v) unlimited

To change the stack size, use the ulimit -s <size> command, where <size> is the new stack size in kilobytes.

Note: Be careful when setting the stack size. A stack size that is too small may have detrimental effects on other programs.

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