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Server is slow,here are some log

the log message always say that mysqld and apache:page allocation failure,why?
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Sep 22 17:19:22 di1 mysqld: page allocation failure. order:4, mode:0x20
Sep 22 17:19:22 di1 Call Trace:
Sep 22 17:19:22 di1 [<c0143481>] __alloc_pages+0x301/0x350
Sep 22 17:19:22 di [<c02c32bd>] ip_queue_xmit+0x4dd/0x5f0
Sep 22 17:19:22 di1 [<c01434ef>] __get_free_pages+0x1f/0x50
Sep 22 17:19:22 di1 [<c014661b>] cache_grow+0xcb/0x320
Sep 22 17:19:22 di1 [<c0146a2f>] cache_alloc_refill+0x1bf/0x2a0
Sep 22 17:19:22 di1 [<c0145b6a>] slab_destroy+0xda/0x120
Sep 22 17:19:22 di1 [<c0146e98>] __kmalloc+0x88/0xa0
Sep 22 17:19:22 di1 [<c02a61e7>] alloc_skb+0x47/0xf0
Sep 22 17:19:22 di1 [<c02d4b87>] tcp_fragment+0x57/0x330
Sep 22 17:19:22 di1 [<c02d5cb9>] tcp_retransmit_skb+0x329/0x360
Sep 22 17:19:22 di1 [<c02d5ff8>] tcp_xmit_retransmit_queue+0x308/0x3f0
Sep 22 17:19:22 di [<c02d002c>] tcp_ack+0x16c/0x3d0
Sep 22 17:19:22 di1 [<c02d2a0f>] tcp_rcv_established+0x29f/0x7c0
Sep 22 17:19:22 di1 [<f895d017>] match+0x17/0x50 [ipt_state]
Sep 22 17:19:22 di1 [<c02dc4aa>] tcp_v4_do_rcv+0x12a/0x130
Sep 22 17:19:22 di1 [<c02dcae0>] tcp_v4_rcv+0x630/0x840
Sep 22 17:19:22 di1 [<c02bfafb>] ip_local_deliver_finish+0xab/0x180
Sep 22 17:19:22 di1 [<c02bfa50>] ip_local_deliver_finish+0x0/0x180
Sep 22 17:19:22 di1 [<c02b6683>] nf_hook_slow+0xf3/0x140
Sep 22 17:19:22 di1 [<c02bfa50>] ip_local_deliver_finish+0x0/0x180
Sep 22 17:19:22 di1 [<c02bf555>] ip_local_deliver+0x1e5/0x210
Sep 22 17:19:22 di1 [<c02bfa50>] ip_local_deliver_finish+0x0/0x180
Sep 22 17:19:22 di1 [<c02bfdd9>] ip_rcv_finish+0x209/0x286
Sep 22 17:19:22 di1 [<c02bfbd0>] ip_rcv_finish+0x0/0x286
Sep 22 17:19:22 di1 [<c02b6683>] nf_hook_slow+0xf3/0x140
Sep 22 17:19:22 di1 [<c02bfbd0>] ip_rcv_finish+0x0/0x286

and the netstat show:,please tell me why my server is slow
# netstat -an|more
tcp 0 0 127.0.0.1:50131 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50130 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50129 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50128 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50135 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50134 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50133 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50132 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50139 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50138 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50137 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50136 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50143 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50142 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50141 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50140 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50127 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50126 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50125 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50124 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50126 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50125 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50124 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50147 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50146 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50145 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50151 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50150 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50149 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50148 127.0.0.1:80 TIME_WAIT
tcp 0 0 127.0.0.1:50152 127.0.0.1:80 TIME_WAIT

and other some log
Sep 24 08:41:00 dig1 CRON[29704]: (root) CMD (test -x /usr/sbin/run-crons && /usr/sbin/run-crons )
Sep 24 08:42:00 dig1 CRON[30499]: (root) CMD (test -x /usr/sbin/run-crons && /usr/sbin/run-crons )
Sep 24 08:42:48 dig1 NETDEV WATCHDOG: eth0: transmit timed out
Sep 24 08:42:50 dig1 e1000: eth0 NIC Link is Up 100 Mbps Full Duplex
Sep 24 08:43:00 dig1 CRON[6071]: (root) CMD (test -x /usr/sbin/run-crons && /usr/sbin/run-crons )

Sorry, no help, just a reminder ...

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