Process going to sleep mode

[Raghavan_2]

I am running HP-UX 11.23 on dual processor with 4GB memory, Itanium2 machine.
We are running Gaussian 03 application (Software for quantum chemistry package)on the above machine. Gaussia 03 jobs when put for computation on the server, the job goes to sleep mode even though the processors are idle.
As the jobs required a huge scratch space to complete the job, 250GB NFS disk space is provided through a 32bit linux machine. Files created during execution for some jobs is of the order 120GB.
Pl advise why the job is going to sleep mode, (As per top command). I have defined to use 2GB memory in my programme.

[Steven E. Protter]

Shalom,

You note:

ob goes to sleep mode even though the processors are idle.

The processes are going into sleep mode because of a few possible reasons:

1) They are idle and have no work to do.
2) They are waiting for I/O to complete and can do nothing further until that point.

Item two can happen when the i/o is handled in a separate process from the job. Example(open process to write data wait for it to complete) What else is the process to do other than sleep and wait for i/o to complete.

When the i/o is complete the job if properly written should wake up.

SEP

[Raghavan_2]

Thank you for your reply.
I got the solution, it is because of I/O it was going to sleep.
Thank you once again.
Regards,
Raghavan