I have an esx 4.0 server that "freezes" randomly.
When I look at performance I can see blank gaps in all the "switch to" areas.
Don't see any errors or warnings.
Hp dl 380 g6
2 5520 procs
I have another one just like it but 36gb ram with no problems.
Both are running the same version esx.
Kinda looks like hardware, but I get no errors or warnings.
Have you any monitoring software eg Openmanage, openview etc on the system? can you check in their logs if there is
some sign of a hardware issue. Also check the iLO homepage for any sign of hardware faults - check the logs in there to see if there is sudden
A good test (maybe not possible in your environment) is if the freezes are very frequent to leave the machine in the BIOS overnight - if it freezes/reboots by the morning you are definitely looking at hardware but chances are you certainly are by the looks of things.
check the log file /var/log/message for the events during the host freeze. It can give us details on whats going on at that time.
There are various reasons for a host to enter zombie state.
I think I got it figured out.
Looking at var/log/vmkernel I saw many errors. Turned out to be dead luns that I removed from SAN.
I refreshed the hba's and not seeing the problems now,
MANY THANKS for the help.