I am facing this issue on my Linux server for long time and not able to resolve it.

I think your problem can safely be narrowed down to:

  1. A hardware problem
  2. A software problem
  3. An earthquake

depending on what you mean by "keels over"

You do realize, I hope, that nobody can diagnose your problem without details.

commented: When I deal with servers I always check "The Disaster Plan." Some companies don't have one. +15
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