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是不是有人攻击我，为什么机器大量使用交换空间swap,导致机器性能大降。
我换了两台机器都是这样，重启机器不到一会就狂用硬盘的交换空间，有什么方式的攻击可能造成这种情况。
机器分别为FreeBSD4.7+apache1.3,FreeBSD5.X+apache2.0
下面是两台机器top的截图。
last pid: 15645; load averages: 0.96, 1.09, 1.01 up 3+01:54:28 1
125 processes: 1 running, 124 sleeping
CPU states: 63.0% user, 0.0% nice, 19.6% system, 0.0% interrupt, 17.4%
Mem: 330M Active, 26M Inact, 95M Wired, 4544K Cache, 61M Buf, 44M Free
Swap: 1024M Total, 48M Used, 975M Free, 4% Inuse, 3492K In
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
137 mysql 2 0 60276K 18648K poll 96:59 22.56% 22.56% mysqld
15424 root 2 0 2060K 636K select 0:23 5.38% 5.37% top
15540 nobody 2 0 9296K 7268K poll 0:01 2.30% 2.29% httpd
15600 nobody 2 0 9004K 7084K poll 0:02 1.52% 1.51% httpd
15529 nobody 2 0 9100K 7260K accept 0:01 1.32% 1.32% httpd
15642 nobody 2 0 9088K 7280K poll 0:00 6.73% 1.22% httpd
15478 nobody 2 0 9536K 6316K poll 0:01 1.17% 1.17% httpd
15394 nobody 2 0 8976K 6928K poll 0:02 0.88% 0.88% httpd
15533 nobody 2 0 9184K 7168K poll 0:01 0.78% 0.78% httpd
15511 nobody 2 0 8548K 6752K poll 0:01 0.73% 0.73% httpd
15449 nobody 2 0 10000K 8076K poll 0:02 0.68% 0.68% httpd
15618 nobody 2 0 8300K 6468K poll 0:00 0.69% 0.68% httpd
15645 mwjx 31 0 2052K 940K RUN 0:00 6.15% 0.59% top
15438 nobody 2 0 9996K 6400K poll 0:01 0.39% 0.39% httpd
15510 nobody 2 0 8244K 6264K poll 0:01 0.39% 0.39% httpd
15230 nobody 2 0 8348K 5716K poll 0:01 0.34% 0.34% httpd
15586 nobody 2 0 9016K 7100K poll 0:01 0.29% 0.29% httpd
15505 nobody 2 0 6284K 4128K poll 0:00 0.29% 0.29% httpd
last pid: 1768; load averages: 0.25, 0.42, 0.38 up 0+00:33:15 21:1
172 processes: 1 running, 171 sleeping
CPU states: 23.3% user, 0.0% nice, 7.0% system, 1.6% interrupt, 68.2% id
Mem: 302M Active, 35M Inact, 83M Wired, 1472K Cache, 60M Buf, 69M Free
Swap: 991M Total, 29M Used, 961M Free, 2% Inuse, 20K In
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
722 mysql 20 0 72416K 14044K kserel 2:51 5.47% 5.47% mysqld
1752 nobody 96 0 10108K 7612K select 0:00 4.63% 1.03% httpd
1717 nobody 96 0 10804K 8332K select 0:00 0.65% 0.63% httpd
1705 nobody 96 0 9500K 7012K select 0:00 0.40% 0.39% httpd
1713 nobody 96 0 10060K 7580K select 0:00 0.40% 0.39% httpd
1757 nobody 96 0 10148K 7652K select 0:00 8.00% 0.39% httpd
1744 nobody 96 0 11204K 8712K select 0:00 1.13% 0.29% httpd
1712 nobody 96 0 9756K 7280K select 0:00 0.25% 0.24% httpd
1745 nobody 96 0 10104K 7616K select 0:00 0.94% 0.24% httpd
1748 nobody 96 0 10032K 7532K select 0:00 1.10% 0.24% httpd
1741 nobody 96 0 10008K 7512K select 0:00 0.17% 0.05% httpd
724 root 96 0 2692K 1088K RUN 0:02 0.00% 0.00% top
930 nobody 96 0 10156K 7236K select 0:01 0.00% 0.00% httpd
1314 nobody 96 0 9820K 7144K select 0:01 0.00% 0.00% httpd
1640 nobody 96 0 9916K 7436K select 0:01 0.00% 0.00% httpd
442 root 8 0 5184K 2144K nanslp 0:01 0.00% 0.00% httpd
1553 nobody 96 0 9808K 7236K select 0:01 0.00% 0.00% httpd
1651 nobody 96 0 9888K 7408K select 0:01 0.00% 0.00% httpd |
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发表于 2005-10-20 22:20
发表于 2005-10-20 22:34
