Deleting records takes long time and unltimately servers hang

[gtcol]

Any suggestions or ulternatives how we can improve the time of this job?
Your help will be greatly appreciated!

Thanks in advance!!!

If the ratio is like 10:1(ie., i mean very high) or more between what gets deleted and what is left behind, a better approach would be to CTAS what you want to retain and drop/truncate the old table. Rename it to original, if dropped.
If you can't do this, there are lots of ways to improve it; at first, do as Davey said, trace. Analyze it. Diagnose. Tune it.