Server optimizaton request
 

<div>Thanks in advance for your help :)
<ol style="list-style-type: decimal">dedicated
CPU type: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz , 4 cores
Real memory 3.67 GB total, 406.61 MB used
SCSI device A 465.76 GB / SCSI device B 465.76 GB
Operating system Debian Linux 4.0
Apache version 2.2.3
PHP version 5.2.0
MySQL version 5.0.32Vbulletin version: 3.8.3
Code:
top - 12:32:25 up 20:44, 2 users, load average: 0.11, 0.12, 0.10
Tasks: 175 total, 1 running, 174 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3845260k total, 3208912k used, 636348k free, 54060k buffers
Swap: 7332020k total, 716k used, 7331304k free, 2801168k cached
Code:
Tasks: 168 total, 1 running, 166 sleeping, 0 stopped, 1 zombie
Cpu0 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 0.7%us, 0.3%sy, 0.0%ni, 99.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 8.6%us, 1.0%sy, 0.0%ni, 90.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3845260k total, 3196944k used, 648316k free, 54268k buffers
Swap: 7332020k total, 716k used, 7331304k free, 2801592k cached
<div style="margin:20px; margin-top:5px"> Code:
auto_increment_increment 1
auto_increment_offset 1
automatic_sp_privileges ON
back_log 50
basedir /usr/
binlog_cache_size 32768
bulk_insert_buffer_size 8388608
character_set_client latin1
character_set_connection latin1
character_set_database latin1
character_set_filesystem binary
character_set_results latin1
character_set_server latin1
character_set_system utf8
character_sets_dir /usr/share/mysql/charsets/
collation_connection latin1_swedish_ci
collation_database latin1_swedish_ci
collation_server latin1_swedish_ci
completion_type 0
concurrent_insert 1
connect_timeout 5
datadir /var/lib/mysql/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
div_precision_increment 4
engine_condition_pushdown OFF
expire_logs_days 10
flush OFF
flush_time 0
ft_boolean_syntax + ->