[[PageOutline(2-5, Table of Contents, floated)]]
= RAM Usage =

Some notes on the RAM allocated and used by the virtual servers.

== puffin ==

wiki:PuffinServer in the server running https://www.transitionnetwork.org/ and it was originally created with 4GB of RAM, on 20th June, following problems related to how it was coping with the load it was under, this was doubled to 8GB of RAM.

Following is a memory usage graph from the Munin stats for the server which illustrate the increase:

[[Image(puffin-memory-month-2013-06-24.png)]]

The sawtooth pattern is caused by !MySQL slowly increasing it's memory usage as more things are cached and !MySQL restarts, this is made clear in the graph below which tracks the memory used by some of the key processes on the server:

[[Image(puffin-multips_memory-month-2013-06-24.png)]]