12.11.2012, 11:30
Memory leaks are very hard to find in most cases, so we can't tell you what's causing the leak. From the plugins you are using, the most likely cause is not freeing results from MYSQL. (just a guess) Also make sure you have the most up to date plugins, in case there is a memory leak in older versions. (i'm sure there was a memory leak problem in an older MYSQL plugin maybe R5)