Hi everyone, I have the following

4 NW 6.5 sp1.1
Zenworks 6.5 1b
Groupwise 6.5.1
Main server - file,dns,groupwise,gwia, VO
2nd server- webaccess only
3rd server- Zenworks 6.5 1b, imaging, inventory
4th server - tape backup

The Main server has out of memory errors about once every two months.

I am looking at applying either sp3 or sp4. From what ?I have read SP3
has alot of memory issues, while sp4 breaks Zenworks?

Any thoughts or recommendations regarding SP3 or SP4?