CODEWITHSUNDEEP
memorysolaris
elizzmc
elizzmc

Reputation: 125

Current memory usage of process at runtime on Solaris

Is there a way to determine (or even estimate) the memory usage of a process on Solaris from within the running process? I need to write a function to do some memory clean-up to keep my process below a certain threshold when it grows too large.

It seems like Solaris does not support getrusage or any way of querying the system for the current RSS/VSZ (memory usage) like Linux/Windows.

Upvotes: 2

Views: 954

Answers (1)

Andrew Henle
Andrew Henle

Reputation: 1

One way to get the information is to read the data from the /proc filesystem. You can get the information you want from /proc/self/psinfo, /proc/self/map, or /proc/self/xmap. See man -s 4 proc.

The /proc/self/psinfo file contains a struct psinfo/psinfo_t as described via procfs.h. The structure contains the size_t pr_size; which contains "the size of the process image in kBytes", and size_t pr_rssize; which contains "resident set size in kBytes".

The /proc/self/map and /proc/self/xmap files contain arrays of struct prmap/prmap_t structures and struct prxmap/prxmap_t structures, respecitively. Both structures contain a size_t pr_size; field defined as "size of mapping in bytes".

Be careful reading /proc - make sure you understand if the data you're trying to read is stored for a 32- or 64-bit process. Offhand, I think everything in Solaris /proc is now 64-bit.

Upvotes: 3

Related Questions