Configuring kernel parameters to run HUGE jobs.

From: <georgec_at_remus.psc.edu>
Date: Thu, 14 Sep 95 15:04:17 -0400

Hello all,

System:
        AlphaServer 8400 5/300
        4 processors
        4 gigabytes of memory
        24 gigs of swap.
        OSF3.2c

The problem:
     Users on this system want to be able to run really large jobs,i.e the
several gigabyte range, but, the kernel has user size limits set to the
following:
        cputime unlimited
        filesize unlimited
        datasize 131072 kbytes
        stacksize 2048 kbytes
        coredumpsize unlimited
        memoryuse 121256 kbytes
        descriptors 4096 files
        addressspace 1048576 kbytes

>From reading the documentation, I have found that the follwoing parameters
effect these limits.
        dfldsiz 134217728
        maxdsiz 1073741824
        dflssiz 2097152
        maxssiz 33554432
        maxvas 1073741824 (default value)
        maxusers 64
    Can anyone tell me the maximum sizes that I can set these to? I don't
expect to have that many users running at anyone time, but the programs that
they do run are big.

        Thanks in advance
            George Cebulka
            Unix Systems Administrator
            Pittsburgh Supercomputing Center.

Received on Thu Sep 14 1995 - 21:31:47 NZST

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