Our server recently died a few times (swap exploded and didn't serve any requests), but since then we've changed a few figures in the configuration files and everything seems fine (for now).

But the apache2 processes seem to be extremely big, each process takes about 200-300MB, and we don't know how to reduce this or even if it is possible (or necessary) to reduce this figure?

So, there are currently 3 sites on this server having 3 separate drupal 6 installations:

• the public site (using memcache 6.x-1.8)
• the development site (only known to a hand full of people)
• and another site (only known to a hand full of people)

And because only a few people know the other two sites I don't think it is a problem having these extra code bases on the same server. But, perhaps we're wrong about this? We have checked the enabled modules and couldn't find any to disable. We also disabled the UIs for some modules (e.g. views). What else can we do?

Some data:

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