求助！
系统是
Apache + PHP+ Tomcat +Mysql
Apache和Tomcat是用lk连接的
现在的情况是直接连tomcat 8080端口，巨快
连接Apache的80端口，巨慢
系统内存还剩1G多，为什么这么慢呢？ 99.5%这项是什么？
求助！
top - 11:20:46 up 1:21, 3 users, load average: 0.18, 0.10, 0.09
Tasks: 387 total, 1 running, 386 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.1%us, 0.2%sy, 0.0%ni, 99.5%id, 0.0%wa, 0.1%hi, 0.2%si, 0.0%st
Mem: 4140552k total, 2616992k used, 1523560k free, 52680k buffers
Swap: 5406712k total, 0k used, 5406712k free, 767708k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3049 root 18 0 1305m 856m 7804 S 0.7 21.2 2:40.91 java
4216 root 15 0 2420 1204 800 R 0.3 0.0 0:01.85 top
1 root 15 0 2068 624 532 S 0.0 0.0 0:00.82 init
2 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
5 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/1
6 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1
8 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/2
9 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/2
10 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/2
11 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/3
12 root 38 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/3
13 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/3
14 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/0
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FROM 124.126.89.*