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I have a linux firewall running Mandrake Linux 8.1 (Vitamin) which has been updated to the 2.4.8-34.1mdk kernel. The computer has 128Meg of memory.
What I have been observing is that the amount of free memory continuously drops as I am using the
Neo-Modus Direct Connect(DC) program to trade data. DC is a peer-to-peer file trading program.
When the machine boots I will have about 90Meg
free as reported by the "free" command. As a cron job, I check memory every 5 minutes...The free memory drops almost every time I look at it....
This process will continue until the machine finally hard locks up....I have observed that within 1 minute of lock-up, the free memory will be down to about 4 Meg......The lock up requires a hardware reset as you can not gain control of the computer in any other way.......
A co-worker told me that IPTABLES must remain in physical memory and will not use SWAP.....This statement has been backed up by my observations.......
Does anyone have an idea what may be causing this type of a memory leak?....?????.........Along with any possible solutions...........
Top does not display anything using more than 2% of the memory......Neither does 'ps -aux'.......
Further review showed the culprit to be the
"slocate.cron" job which was run by anacron....
Eventhough I had disabled anacron for run level 3
.........
I moved slocate and makewhatis out of the cron path and the memory leak seems to be gone.....
Guess only time will tell if this is truely the solution....
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