Memory Alerts Wordpress a Memory Hog LFD

[consultant]

I've raised my max memory setting to 768MB and my max RSS Memory Setting to 512. These are much higher than the default settings. On a Linux server those are pretty large chunks of memory for an application to use. Nothing else triggers an LFD warning except Wordpress websites and I get a warning on the 768MB and 512MB limits about once or twice a day running 4 relatively medium traffic Wordpress sites that don't have a gazillion plugins. My server has 8GB physical memory.

I'm guessing this is pretty normal and I just need to raise the limits or live with the occasional warning? I'm sure others here have run into this since Wordpress is so popular. What did you do? Raise the limits further or turn the warning off?