show innodb status

查询总是很慢，表中大约有20万条记录，有时候select count(*) from table 需要2秒钟,
叶叔帮忙看看有什么问题。
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070118 14:39:38 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 5 seconds
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 3580, signal count 3542
Mutex spin waits 2823, rounds 43988, OS waits 621
RW-shared spins 5613, OS waits 2675; RW-excl spins 301, OS waits 265
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TRANSACTIONS
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Trx id counter 0 410695
Purge done for trx's n:o < 0 410679 undo n:o < 0 0
History list length 22
Total number of lock structs in row lock hash table 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0 410632, not started, OS thread id 1816
MySQL thread id 11, query id 644522 localhost 127.0.0.1 echunt
---TRANSACTION 0 410693, not started, OS thread id 3836
MySQL thread id 13, query id 644923 localhost 127.0.0.1 echunt
---TRANSACTION 0 409222, not started, OS thread id 884
MySQL thread id 3, query id 644924 localhost 127.0.0.1 root
show innodb status
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FILE I/O
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I/O thread 0 state: wait Windows aio (insert buffer thread)
I/O thread 1 state: wait Windows aio (log thread)
I/O thread 2 state: wait Windows aio (read thread)
I/O thread 3 state: wait Windows aio (write thread)
Pending normal aio reads: 0, aio writes: 0,
ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
2808 OS file reads, 117816 OS file writes, 67116 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 6.80 writes/s, 3.00 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf for space 0: size 1, free list len 0, seg size 2, is empty
Ibuf for space 0: size 1, free list len 0, seg size 2,
15 inserts, 15 merged recs, 3 merges
Hash table size 291199, used cells 5252, node heap has 6 buffer(s)
6.20 hash searches/s, 33.79 non-hash searches/s
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LOG
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Log sequence number 0 248216146
Log flushed up to 0 248216146
Last checkpoint at 0 248206649
0 pending log writes, 0 pending chkp writes
54523 log i/o's done, 2.00 log i/o's/second
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BUFFER POOL AND MEMORY
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Total memory allocated 75032648; in additional pool allocated 252032
Buffer pool size 4032
Free buffers 1
Database pages 4025
Modified db pages 15
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages read 2798, created 1489, written 58061
0.00 reads/s, 0.00 creates/s, 4.40 writes/s
Buffer pool hit rate 1000 / 1000
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
1 read views open inside InnoDB
Main thread id 3796, state: sleeping
Number of rows inserted 98004, updated 49002, deleted 0, read 14184649
3.20 inserts/s, 1.60 updates/s, 0.00 deletes/s, 7.20 reads/s
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END OF INNODB MONITOR OUTPUT
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