I am running the binary installation of MySQL 4.0.14 on FreeBSD 4.8, all
MyISAM tables, and after alittle while mysqld will jump to 100% of my
CPU and go crazy.  I've investigated SHOW INNODB STATUS, and as you can
see below, there is nothing happening with Innodb.  Infact my Innodb
files have not even changed since I last restarted.  But for some reason
MySQLd uses 100% of my CPU with no queries happening.  I tried to run
ktrace and this was all I saw:


 30488 mysqld   CALL  gettimeofday(0x2846e288,0)
 30488 mysqld   RET   gettimeofday 0
 30488 mysqld   CALL  poll(0x83b6000,0xc,0)
 30488 mysqld   RET   poll 0
 30488 mysqld   CALL  poll(0x83b6000,0xd,0x126)
 30488 mysqld   RET   poll 1
 30488 mysqld   CALL  gettimeofday(0x2846e288,0)
 30488 mysqld   RET   gettimeofday 0
 30488 mysqld   CALL  poll(0x83b6000,0xd,0x126)
 30488 mysqld   RET   poll 1

With an occasional

 30488 mysqld   CALL  poll(0x83b6000,0xd,0x126)
 30488 mysqld   PSIG  SIGPROF caught handler=0x2842562c mask=0x0
code=0x0
 30488 mysqld   RET   poll 1
 30488 mysqld   CALL  gettimeofday(0x2846e288,0)
 30488 mysqld   RET   gettimeofday 0
 30488 mysqld   CALL  sigreturn(0x83a9db8)
 30488 mysqld   RET   sigreturn JUSTRETURN


Has anyone experienced a runway mysqld on FreeBSD before?  Is there
anything I can do to fix this or solve this problem?  Below is show
innodb status\g

=====================================
030828 14:36:37 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 16 seconds
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 4, signal count 4
Mutex spin waits 0, rounds 0, OS waits 0
RW-shared spins 6, OS waits 3; RW-excl spins 1, OS waits 1
------------
TRANSACTIONS
------------
Trx id counter 0 1280
Purge done for trx's n:o < 0 0 undo n:o < 0 0
Total number of lock structs in row lock hash table 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0 0, not started, OS thread id 299134976
MySQL thread id 176926, query id 516226 localhost root
show innodb status
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (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
40 OS file reads, 4 OS file writes, 4 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf for space 0: size 1, free list len 0, seg size 2,
0 inserts, 0 merged recs, 0 merges
Hash table size 34679, used cells 0, node heap has 0 buffer(s)
0.00 hash searches/s, 0.00 non-hash searches/s
---
LOG
---
Log sequence number 0 43892
Log flushed up to   0 43892
Last checkpoint at  0 43892
0 pending log writes, 0 pending chkp writes
9 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 16338600; in additional pool allocated 641280
Buffer pool size   512
Free buffers       493
Database pages     19
Modified db pages  0
Pending reads 0 
Pending writes: LRU 0, flush list 0, single page 0
Pages read 19, created 0, written 0
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
No buffer pool page gets since the last printout
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
Main thread id 158370816, state: waiting for server activity
Number of rows inserted 0, updated 0, deleted 0, read 0
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT

Nick


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