2009/3/10 Jonathan Ryshpan <jonrysh@xxxxxxxxxxx>: > Investigating why my computer had suddenly become very s.l.o.w, I > noticed that virtual memory usage had become very large. Following is > an extract from a "$ ps axuw" for the system sorted according to VM > usage, the top 20 processes in VM usage. Does anyone know why evolution > + evolution evolution-data-server use not quite 2 GBytes? Or why the > ordinary applets use together 1.4 GBytes? Or why sealert uses about 0.5 > GBytes? Or anything else on this list? > > PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND > 2656 1.2 5.2 1668576 53708 ? Sl 12:20 1:26 evolution > 2662 0.0 0.2 444628 2680 ? S 12:20 0:00 /usr/bin/python -E /usr/bin/sealert -s You can't add up the VSZ sizes of processes and arrive at a simple sum, because you don't have enough information. Program 1 links to library A and uses shared memory B => VSZ1 = SizeOf(1) + SizeOf(A) + SizeOf(B) Program 2 also links to library A and uses shared memory B => VSZ2 = SizeOf(2) + SizeOf(A) + SizeOf(B) So you'd think that the total memory in use would be VSZ1+VSZ2, but each library is only in memory once so in actual fact it's only VSZ1+SizeOf(2). To look at it another way, say you have 1000 processes running using 1kb, each linking in a different library of 1kb. The VSZ of each of them would only be 2kb. You then have an additional process using 1kb running, that links in *all* of the 1000 libraries already in memory. It's VSZ would be 1001kb, even though it's actually only using 1kb more of memory. But yes, Evolution is a memory hog ;o) -- Sam -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
