conclusion (sort of)

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I suggest that you:

1) Monitor your Zope clients' thread usages by using their debug facilities.

did this and saw that a lot of connections spent on getting images. when the images were moved so that apache serve them, the server is more responsive, now, i seldom encounter more than 100 simultaneous httpd connection. it's as if zope is responding slowly that connections to apache accumulate. all the images are small in size (<20k). i still don't have the answers to why that will affect response time. anybody? and i'm sure i never did any other changes to the setup. only moving images to apache. thanks -------------------------------------------------------