Out of memory error??

[TAG]

Hi ALL,

I have a curious problem - I keep getting the following error in logs:

May  2 05:17:49 xsimail qmail: 957251869.565023 alert: out of memory,
sleeping...


I have 512MB of memory and 1GB SWAP on a solaris 7 system running on a
quad 333MZ SPARC system??

How can it be out of memory!!!

Please can anyone explain???

ALSO - running qmail 1.03 and the mysql patch from Iain Patterson??

Thanks

Tonino