MySQL optimization for this kind of server

Hello,

Server Spec: Celeron 2.2Ghz + 512MB DDR Ram, IDE HDD, Fedora Linux 1, MySQL 4.0.18, Direct Admin

Only 1 site, PHP+MySQL Forum, PHP+MySQL Flash Guestbook

Code: 
[mysqld]
#datadir=/var/lib/mysql
#socket=/var/lib/mysql/mysql.sock
#skip-locking
#skip-innodb
query_cache_limit=1M
query_cache_size=32M
query_cache_type=1
max_connections=400
#interactive_timeout=100
wait_timeout=30
connect_timeout=15
thread_cache_size=128
key_buffer=32M
join_buffer=1M
max_allowed_packet=5M
table_cache=1024
record_buffer=1M
sort_buffer_size=2M
read_buffer_size=2M
max_connect_errors=10
thread_concurrency=2

[mysqldump]
quick
max_allowed_packet=16M

[mysql]
no-auto-rehash
#safe-updates

[isamchk]
key_buffer=20M
sort_buffer_size=20M
read_buffer=2M
write_buffer=2M

[myisamchk]
key_buffer=20M
sort_buffer_size=20M
read_buffer=2M
write_buffer=2M

[mysqlhotcopy]
interactive-timeout
What is funny in the top: the mysqld's time never ends...it stays on the top and the time reaches 500 minutes, and CPU usage is like 45%. But over CPU Load stay in 3.5 Max

Thanks

 

 

 

 

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