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[ts-7000] Memory buffers goes to zero - ts7260 hangs

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Subject: [ts-7000] Memory buffers goes to zero - ts7260 hangs
From: "tedapt" <>
Date: Tue, 23 Jun 2009 00:52:06 -0000
Hi all -

I have a data logging JamVM application on ts-7260 boards running Debian from 
an SD card.  In some of my applications configurations, I find that the Buffers 
value obtained from `free` rises, then falls to zero over the course of about 
six hours. Once Buffers hits zero, the boards become unreachable, and all 
application processes appear to hang until a power cycle.

In other configurations, the Buffers value rises and stays above the Free 
value, following a sawtooth pattern. On these boards, all remains OK for long 
periods.  Occasionally I've seen these boards suddently exhibit a similar 
memory pattern, with Buffers suddenly declining until reaching zero, and again 
these boards become unreachable.

I'm at a loss to understand what is happening. Have experimented with swap 
files, new versions of JamVM, code modifications and some sysctl settings, 
examined netstat, lsof output, all without any improvements.

Has anyone every seen anything like this, or have any suggestions for solving 
this problem?

Thanks!





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