InDesignServer instance of LBQ cost up to 1.2GB memory

Hi,

I have use InDesignServer to convert indd files to pdf with the help of LBQ feature of IDS.

But at first, the memory of each instance cost 90-150Mb, after a lots of test of converting yesterday, I find it costs up to 1.2 GB for each instance while starting up, CPU usage of each instaces can up to 25%!!!!

What's the problem? I restarted the computer and reinstall the IDS, but it still costs about 1.2 GB for each IDS instance.

Can anyone tell me what happened?

Darren.