On Thu, 01 Aug 2002, Nate Campi wrote: > On Fri, Aug 02, 2002 at 03:53:24PM +1200, John Morton wrote: > > > > Maildir performance and scalability is dependant on the filesystem. If the > > filesystem your maildirs live on store small files efficiently, and can > > list > > and access files in directories filled with thousands of other small files, > > no problem (ie Reiserfs), but if not (ie ext2/3), performance will tend to > > suck. > > ext3 is extremely fast with directories with thousands of files in them. > > ext3: > $ time ls -al ~/mail/folders/systems/cur/ | wc -l > 5602 > > real 0m0.297s > user 0m0.240s > sys 0m0.050s > > reiserfs: > $ time ls -al ~/mail/folders/systems/cur/ | wc -l > 5584 > > real 0m31.667s > user 0m0.810s > sys 0m1.020s
Please realize that it's not enough to stat them. Your MUA needs to open
all of them to read the mail headers:
I'm using ext3 ATM:
[EMAIL PROTECTED]:...debian-bugs-closed$ time
find -type f | wc -l
33933
find -type f 0.15s user 1.32s system 33% cpu 4.405 total
wc -l 0.01s user 0.00s system 0% cpu 4.404 total
[clear buffers && cache here]
[EMAIL PROTECTED]:....debian-bugs-closed$ time find -type f | xargs head >
/dev/null
find -type f 0.17s user 1.38s system 1% cpu 1:46.14 total
xargs head > /dev/null 1.02s user 5.59s system 6% cpu 1:47.62 total
yours,
peter
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