منتدى استراحات زايد - Server Optimization Request

<div>Server Optimization Request
It seems that during peak times my server gets overwhelmed and sometimes apache crashes. Also sometimes MySQL will stop working. Plesk will automatically stop these but during that time the server load gets really high. We are using Xcache to cache. Any Help? Thanks

1. Dedicated Server
2.
2.53GHz Cel, 1GB DDR RAM, 80GB SATA Centos 4.4
php: 4.3.9
mysql: 4.1.20
Apache: Apache v2.0.52
3. 3.8.2
4. None
5. it was installed via YUM
6. PHP Code:

top - 11:09:38 up 357 days, 21:12, 2 users, load average: 1.61, 1.56, 1.39
Tasks: 102 total, 2 running, 100 sleeping, 0 stopped, 0 zombie
Cpu(s): 31.1%us, 7.9%sy, 0.0%ni, 0.3%id, 59.6%wa, 0.7%hi, 0.3%si, 0.0%st
Mem: 1019068k total, 1004992k used, 14076k free, 4612k buffers
Swap: 2040244k total, 59492k used, 1980752k free, 688788k cached

(this is not when it gets out of control)
7.
PHP Code:

[mysqld]
safe-show-database
old_passwords
back_log = 75
max_connections = 450
key_buffer = 32M
myisam_sort_buffer_size = 64M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 2500
thread_cache_size = 192
wait_timeout = 345
connect_timeout = 10
tmp_table_size = 64M
max_heap_table_size = 64M
max_allowed_packet = 64M
net_buffer_length = 16384
max_connect_errors = 10
thread_concurrency = 2
concurrent_insert = 2
table_lock_wait_timeout = 30
read_rnd_buffer_size = 786432
bulk_insert_buffer_size = 8M
query_cache_limit = 2M
query_cache_size = 16M
query_cache_type = 1
query_prealloc_size = 262144
query_alloc_block_size = 65536
transaction_alloc_block_size = 8192
transaction_prealloc_size = 4096
default-storage-engine = MyISAM

skip-bdb

[mysql.server]
user=mysql
basedir=/var/lib

[mysqld_safe]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
#nice = -5
open_files_limit = 8192

[mysqldump]
quick
max_allowed_packet = 24M

[myisamchk]
key_buffer = 64M
sort_buffer = 64M
read_buffer = 32M
write_buffer = 32M

[mysqlhotcopy]
interactive-timeout