System Administration Guide, Volume 1

Swap-Related Error Messages

These messages indicate that an application was trying to get more anonymous memory and there was no swap space left to back it.

application is out of memory
malloc error O
messages.1:Sep 21 20:52:11 mars genunix: [ID 470503 kern.warning] 
WARNING: Sorry, no swap space to grow stack for pid 100295 (myprog)