Courier IMAP and Squirrelmail issue with Maildir

[raymonvdm]

2 weeks ago i replaced my ispconfig server.

So i installed an new server folowing:

http://www.howtoforge.com/perfect-server-ubuntu8.04-lts

And after that i backuped and restored the ispconfig database. After that i had to modify some custom files and all is ok.

But now i have a problem with reading email from squirrelmail. All reading is ok but when i open mij inbox (4000 messages) IMAPD hits 100& cpu.

So i started to trace the pid op imapd
strace -p 17222

And it seems that courier reads al files in the cur directory every time i open the inbox in squirrel. I didn`t see this issue using my old server.

What is wrong with courier ?

[raymonvdm]

Partial trace file:

munmap(0xb7f58000, 4096) = 0
stat64("./cur/1238805982.M371587P16172V0000000000006803I0041C26A _145.home.server.local,S=4772:2,S", {st_mode=S_IFREG|0600, st_size=4772, ...}) = 0
readlink("./cur/1238805982.M371587P16172V0000000000006803I0041C26A _145.home.server.local,S=4772:2,S", 0x8191230, 256) = -1 EINVAL (Invalid argument)
open("./cur/1238805982.M371587P16172V0000000000006803I0041C26A _145.home.server.local,S=4772:2,S", O_RDONLY|O_NONBLOCK) = 6
fcntl64(6, F_SETFL, O_RDONLY) = 0
fstat64(6, {st_mode=S_IFREG|0600, st_size=4772, ...}) = 0
lstat64("./cur/1238805982.M371587P16172V0000000000006803I0041C26A _145.home.server.local,S=4772:2,S", {st_mode=S_IFREG|0600, st_size=4772, ...}) = 0
fcntl64(6, F_GETFL) = 0 (flags O_RDONLY)
fstat64(6, {st_mode=S_IFREG|0600, st_size=4772, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f58000
_llseek(6, 0, [0], SEEK_CUR) = 0
_llseek(6, 0, [0], SEEK_SET) = 0
lseek(6, 0, SEEK_CUR) = 0
lseek(6, 0, SEEK_SET) = 0
read(6, "Return-Path: <info@marktplaats.n"..., 8192) = 4772
read(6, "", 8192) = 0
lseek(6, 0, SEEK_SET) = 0
fstat64(6, {st_mode=S_IFREG|0600, st_size=4772, ...}) = 0
stat64("/etc/localtime", {st_mode=S_IFREG|0644, st_size=2917, ...}) = 0
_llseek(6, 0, [0], SEEK_SET) = 0
read(6, "Return-Path: <info@marktplaats.n"..., 4096) = 4096
time(NULL) = 1238810367
write(1, "UID 5073 RFC822.SIZE 8268 INTERN"..., 2952) = 2952
time(NULL) = 1238810367
time(NULL) = 1238810367
select(1, [0], NULL, NULL, {1800, 0}) = 1 (in [0], left {1795, 660000})
read(0, "C64 EXAMINE \"\"\r\n", 8192) = 16
brk(0x81f9000) = 0x81f9000
time(NULL) = 1238810371
write(1, "C64 NO Mailbox does not exist, o"..., 58) = 58
time(NULL) = 1238810371
time(NULL) = 1238810371
select(1, [0], NULL, NULL, {1800, 0}

[raymonvdm]

In the user.pref file of squirrel there was a option

sort=0

this option slowed down the index, because it will sort all mail in the inbox folder, not sure wich plugin set this option....

No placed:

#sort=0 and the problem is solved...