Tagged Questions
3
votes
2answers
173 views
Memory management, bias to swapping
I was having 768 MB RAM. In a general day MySQL was using 100-180 mb of RAM and MySQL was swapping 80-120 mb. I was having 50-60 mb free RAM.
So I thought I should upgrade. Then I upgraded my RAM ...
4
votes
1answer
141 views
Limit disk buffer usage in SLES 11SP2 to allow more efficient memory overcommit on esxi host
When running VMs on an ESXi host, you can overcommit the memory.
Example: host == 20GB physical RAM
The amount of RAM allocated to each VM is
VM1 == 10gb
VM2 == 10gb
VM3 == 10gb
VM4 == 10gb
The ...
13
votes
2answers
560 views
Why does Linux purge the memory cache when it is nearly full?
Here's what the memory graph looks like on a VPS running CentOS with 512MB of RAM and nginx/php-fpm/mysqld serving (mostly static) content to a couple thousand visitors per day.
(those are days on ...
2
votes
1answer
361 views
What is the buffers column in the output from free?
These questions briefly list the format of the free command, noting that buffers is kernel memory that must be written out to disk and cache is file data that does not need to be written disk.
On my ...
2
votes
2answers
212 views
`free`: output format
I use free to get the amount of free space on some of my servers. Its output is something like:
$ free -m
total used free shared buffers cached
Mem: 374 ...
2
votes
3answers
214 views
Is there a way to tell the system to keep a folder to reside in memory?
I'm developing a Java EE web application and I'm trying to speed up the testing process. To do so I was wondering if there is a way to tell the system to keep my build folder in system memory?
2
votes
0answers
404 views
Linux kernel slab usage growing on embedded system
I'm in the process of QA/debugging a project on a custom embedded linux system. The problem we're VERY tight on memory, and even a couple megs can cause issues with our software.
What I'm seeing ...
