Re: Re: PHP profiling results under 2.0.37 Re: Performance of Apache 2.0 Filter

At 02:57 AM 6/9/2002, Brian Pane wrote:

In the httpd, we've done two things to minimize the fragmentation: * Memory for these heaps is almost always allocated in chunks of a fixed size, 8KB.

Hmm, but doesn't that mean that the largest contiguous block this heap will be able to provide is 8KB, then?

* There's a two-layer structure to the heaps:

     - apr_pool objects are what the application uses.  Each pool
       provides a fast alloc interface, no free function, and a
       "destructor" that returns all the allocated space when the
       pool is destroyed.

This is probably not very suitable for PHP. We allocate and free *a lot*, not being able to free is going to increase memory consumption significantly. If we use APR heaps, are we bound by this behavior? Zeev