SUMMARY: Alphaserver 1200 and T64 5.1B: memory holes??

From: Fred N. van Kempen <Fred.van.Kempen_at_microwalt.nl>
Date: Wed, 23 Jul 2003 00:41:31 +0200

Hi All,

The answer to my question (see below) is, to re-configure the
swapping from EAGER to LAZY in the /etc/sysconftab file. By
default, T64 will set this to EAGER, meaning it will allocate
(reserve) memory for each process. By resetting this to LAZY
mode, memory will only be allocated when needed.

If one has less swap space than physical memory (which is what
I have), best thing to do is set this to LAZY.

Thanks for all who replied!! My system is working great now!

(now, off to hunt down a newer copy of the CXX compiler, since
my V6.3 is kinda old and rusty..)

Cheers,
        Fred

--------original question---------
Hmm.. decided to do some more serious work with my AS1200, so reinstalled the machine (which
was running 5.0 so far) with 5.1B, and did the PK2 dance. All seems well.

BUT...

.. while compiling (remotely, under CDE), I often get the "swap space below 10%" message,
which I started to find strange. Although I indeed only set up 128MB of swap, the machine
DOES have 1024MB of RAM.

A quick "vmstat -P" showed, that the machine reports three segments of 256.00M (exactly)
each, marked as "hole".

This probably is causing my memory problems; I assume the machine actually believes it has
only 256MB.

Is this a known issue? Anyone have more info?

Thanks lots,

Fred
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Received on Tue Jul 22 2003 - 22:42:31 NZST

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