#memory-usage

[sevennet-blog]

How to: apache eats up too much ram per child #development #computers #dev

How to: apache eats up too much ram per child #development #computers #dev

apache eats up too much ram per child

I’ve got fallowing problem: Apache eat to many ram per child.

The fallowing comments shows:

cat /etc/redhat-release Fedora release 8 (Werewolf)

free -m:

total used free shared buffers cached Mem: 3566 3136 429 0 339 1907 -/+ buffers/cache: 889 2676 Swap: 4322 0 4322

I know that you will say that there is nothing to worry about because swap is not use, but…

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[sevennet-blog]

Fix: How large is my ZFS dedupe table at the moment? #computers #development #answer

Fix: How large is my ZFS dedupe table at the moment? #computers #development #answer

How large is my ZFS dedupe table at the moment?

I have read a lot of information about planning RAM requirements forZFS deduplication. I’ve just upgraded my file server’s RAM to support some very limited dedupe on ZFS zvols which I cannot use snapshots and clones on (as they’re zvols formatted as a different filesystem) yet will contain much duplicated data.

I want to make sure that the new RAM…

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[sevennet-blog]

Fixed: Why is Linux reporting "free" memory strangely? #answer #it #solution

Fixed: Why is Linux reporting "free" memory strangely? #answer #it #solution

Why is Linux reporting "free" memory strangely?

This is a canonical question about how Unix operating systems report memory usage. Similar Questions:

Server refuses to use swap partition

Memory Usage in LINUX

I have production server that is running Debian 6.0.6 Squeeze

#uname -a

Linux debsrv 2.6.32-5-xen-amd64 #1 SMP Sun Sep 23 13:49:30 UTC 2012 x86_64 GNU/Linux

Every day cronexecutes backup…

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[sevennet-blog]

Fixed: Free / Cached / Available memory on Linux #solution #programming #it

Fixed: Free / Cached / Available memory on Linux #solution #programming #it

Free / Cached / Available memory on Linux

I have read that linux uses free memory for caching, to make system faster. However, both Nagios and Paessler PRTG monitoring system show me that my memory usage is critical.

I could change Nagios mem_usage script to sum free and cached memory, but would that be correct information? I doubt that they misunderstood Linux memory usage.

Lets say I have 8 GB…

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[sevennet-blog]

How-to: Is it possible to list the files that are cached? #fix #programming #development

How-to: Is it possible to list the files that are cached? #fix #programming #development

Is it possible to list the files that are cached?

Here the output of free -m:

total used free shared buffers cached Mem: 7188 6894 294 0 249 5945 -/+ buffers/cache: 698 6489 Swap: 0 0 0

I can see almost 6GB(5945MB) memory out of 7GB is used in caching the files. I know how to flush the caches. My question is: Is possible see which files(or inodes) are being cached?

Answer [by the-wabbit]: Is…

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[sevennet-blog]

Answer: Linux not freeing large disk cache when memory demand goes up #dev #solution #programming

Answer: Linux not freeing large disk cache when memory demand goes up #dev #solution #programming

Linux not freeing large disk cache when memory demand goes up

Running Ubuntu on a 2.6.31-302 x86-64 kernel. The overall problem is that I have memory in the ‘cached’ category that keeps on going up and will not be freed or used even when our application needs it.

So here’s what I get out of the ‘free’ command. None of this looks out of the ordinary at first glance.

# free total used free shared…

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[sevennet-blog]

How-to: Apache memory usage optimization #solution #dev #development

How-to: Apache memory usage optimization #solution #dev #development

Apache memory usage optimization

Apache is using too much of my server memory causing it to crash. I have 4GB of RAM in the server.

I’m trying to fine tune Apache settings in order to improve it’s performance but I’m quite new at this.

I was trying to follow this article’s advice but I’m not sure how to calculate things and it seems I’m making it worse.

My top reads like:

11697 apache 15 0 322m…

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[goodanswerbiz]

Resolved: Effects of configuring vm.overcommit_memory #it #dev #answer

Resolved: Effects of configuring vm.overcommit_memory #it #dev #answer

Effects of configuring vm.overcommit_memory

My VPS web server running on CentOS 5.4 (Linux kernel 2.6.16.33-xenU) irregularly (like once a month give or take a few weeks) becomes unresponsive due to oom-killer kicking in. Monitoring of the server shows that it doesn’t normally run out of memory, just every so often.

I’ve read a couple of blogs that point to this pagewhich discusses configuring…

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