could SET DISPLAY be caching an IP address?

From: Phillip Helbig---remove CLOTHES to reply (helbig_at_astro.multiCLOTHESvax.de)
Date: 09/02/04 

Date: Thu, 2 Sep 2004 19:26:18 +0000 (UTC)

Here's the situation: I run MOZILLA on a reasonably powerful machine,
and set the display to a less powerful machine with a dynamic IP
address. MOZILLA is running in a batch job. When the IP address
changes, MOZILLA will eventually fail, and another batch job will notice
that the MOZILLA job is missing and re-submit it. This works, but the
delay seems too long (an hour or so). For debugging purposes, I put
some SHOW TIME and TCPIP SHOW DEVICE commands in the procedures for the
batch jobs. Now the restart of MOZILLA after they dynamic IP address on
the display machine changes is much faster.

The argument of SET DISPLAY is a name, not a number. Could it be that
when the job fails and is restarted, the display is directed to the OLD
IP address (i.e., it has been cached) and that the TCPIP SHOW DEVICE
forces a lookup and hence an update of the cache? (There is no problem
with TTL or whatever with the DNS provider; I'm using DynDNS.org for
this and the new address is visible worldwide only a few seconds after
the update goes through. I am also 100% certain that the update is
successful very soon after the address changes.)

This situation in general is slow but usable. What is the least
powerful machine anyone has run Mozilla on? Am I correct in assuming
that the bottleneck is memory, not CPU?

The display machine is a DEC 3000/600 with 192 MB. Would it even be
worth trying to run Mozilla locally on this box? If not, what about
with a memory increase? (What's the max, by the way, for this box?)

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