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Joe Orton wrote: Thanks for your reply - but the differences are very dramatic. Makes me think there's something else different. I'm trying to remember - isn't there a php trick that shows you the php configuration in html form? Maybe I could compare the two installations. Or is there a httpd trick to display modules and memory usage?On Tue, Sep 27, 2005 at 08:37:16AM -0700, Marc Perkel wrote:Kind of an odd problem but I'm moving my stuff to a new server and for some reason Apache (2.0.54) is using a lot more memory on the new server than on the old server. I'm hosting the same web sites and (I think) I have all the same software installed. Both running Fedora Core 4. The new server is running the 64 bit Linux. The new server is a dual core athlon - the old has 2 Xeon CPUs. Both have 4 gigs of ram.64-bit platforms will in general show more memory use than a 32-bit platform due to pointers etc being twice as big. Linux on amd64 will also appear to have unnaturally virtual memory use due to the way the loader/kernel interact. But this isn't actually physical RAM being used up so don't worry about it. To compare the two systems make sure that you have exactly the same modules being loaded; PHP for instance will show up larger VM use because it drags in so many shared libraries. I could use some tricks to diagnose this. The new server - running top looks like this: 532 apache 15 0 199m 51m 11m 0.0 0:00 /usr/sbin/httpd 1091 apache 15 0 199m 51m 11m 0.0 0:00 /usr/sbin/httpd 866 apache 15 0 240m 45m 11m 0.0 0:00 /usr/sbin/httpd 32135 apache 16 0 235m 40m 11m 0.0 0:00 /usr/sbin/httpd 583 apache 15 0 235m 40m 11m 0.0 0:00 /usr/sbin/httpd 850 apache 15 0 235m 40m 11m 0.0 0:00 /usr/sbin/httpd 857 apache 16 0 233m 38m 11m 0.0 0:00 /usr/sbin/httpd 25277 apache 16 0 186m 38m 11m 0.0 0:00 /usr/sbin/httpd The old server running top looks like this: 13393 apache 16 0 49924 30m 13m 0.0 0:01 /usr/sbin/httpd 1539 apache 16 0 49832 30m 13m 0.0 0:00 /usr/sbin/httpd 5883 apache 15 0 49780 30m 13m 0.0 0:00 /usr/sbin/httpd 32091 apache 16 0 49780 30m 13m 0.0 0:00 /usr/sbin/httpd 1537 apache 16 0 49692 30m 13m 0.0 0:00 /usr/sbin/httpd 1540 apache 16 0 49692 30m 13m 0.0 0:00 /usr/sbin/httpd 9882 apache 16 0 49760 30m 13m 0.0 0:00 /usr/sbin/httpd 9895 apache 16 0 48940 29m 13m 0.0 0:00 /usr/sbin/httpd |
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