pop3 slow respond

[Andrey Kolbasenko]

Hi all!

I have installed Gentoo Linux with cyrus-imapd-2.3.3+postfix+virtual 
domains+mysql. When I connect to pop3 5 or more times, or about 10 or more 
client receive his mail, cyrus answer only after 10-30 sec, and when number 
of pop3 clients reach 20-30, cyrus completely not respond:


telnet 10.26.1.4 110
Trying 10.26.1.4...
Connected to 10.26.1.4.
Escape character is '^]'.
+OK ns.stv.stav Cyrus POP3 v2.3.3-Gentoo server ready 
<3386648995.1147328970 at ns.stv.stav>
quit

telnet 10.26.1.4 110
Trying 10.26.1.4...
Connected to 10.26.1.4.
Escape character is '^]'.
+OK ns.stv.stav Cyrus POP3 v2.3.3-Gentoo server ready 
<3386648995.1147328970 at ns.stv.stav>
quit

....

telnet 10.26.1.4 110
Trying 10.26.1.4...
Connected to 10.26.1.4.
Escape character is '^]'.

top command:
--------------------
top - 10:53:42 up 28 days,  2:52,  1 user,  load average: 0.00, 0.02, 0.37
Tasks: 123 total,   2 running, 121 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.3% us,  0.3% sy,  0.0% ni, 99.3% id,  0.0% wa,  0.0% hi,  0.0% si
Mem:    906064k total,   836212k used,    69852k free,    82320k buffers
Swap:   506036k total,       92k used,   505944k free,   541628k cached

29434 cyrus     16   0 30188 2624 2024 S  0.3  0.3   0:00.04 pop3d

netstat -an
--------------------
tcp        0      0 10.26.1.4:110           10.26.5.128:1330        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.224:2120        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.130.71:3230       TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.4.105:2317        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.4.105:2319        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.172:1588        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.206:1367        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.72.11:3117        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.238:3453        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.238:3455        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.104:2579        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.228:1691        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.38:4004         TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.166:2525        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.38:4002         TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.166:2527        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.38:4000         TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.197.2:1355        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.75.2:1220         TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.52:1211         TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.71.154:1449       TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.5.220:1457        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.197.2:1371        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.132.5:2333        TIME_WAIT
tcp        0      0 10.26.1.4:110           10.26.132.5:2329        TIME_WAIT

I need your suggestions..