vps占用内用的优化，主要是apche的httpd.conf配置文件优化、php的php.ini、mysql的my.cnf配置的文件的优化，apache优化上一篇已经讲过，请参考：Apache vps占用内存几百兆不释放内存直至死机
优化如下：
一、增加256M的swap交换文件
1、创建并激活swap交换文件
cd /var/
dd if=/dev/zero of=swapfile bs=1024 count=262144
/sbin/mkswap swapfile
/sbin/swapon swapfile
dd if=/dev/zero of=swapfile bs=1024 count=262144
/sbin/mkswap swapfile
/sbin/swapon swapfile
2、加到fstab文件中让系统引导时自动启动
vi /etc/fstab
在末尾增加以下内容：
引用
/var/swapfile swap swap defaults 0 0
二、MySQL 5.1配置优化
MySQL 5.1 配置文件（my.cnf）优化
vi /etc/httpd/conf my.cnf ，打开后编辑内容,下面的参数是参考，我优化下来内存free有所增加
[client]
port = 3306
socket = /tmp/mysql.sock
[mysql]
prompt="(\u:s135:)[\d]> "
no-auto-rehash
[mysqld]
port = 3306
socket = /tmp/mysql.sock
[mysql]
prompt="(\u:s135:)[\d]> "
no-auto-rehash
[mysqld]
user = mysql
port = 3306
socket = /tmp/mysql.sock
basedir = /usr/local/webserver/mysql
datadir = /usr/local/webserver/mysql/data
open_files_limit = 600
back_log = 20
max_connections = 100
max_connect_errors = 200
table_cache = 60
external-locking = FALSE
max_allowed_packet = 16M
sort_buffer_size = 128K
join_buffer_size = 128K
thread_cache_size = 10
thread_concurrency = 8
query_cache_size = 0M
query_cache_limit = 2M
query_cache_min_res_unit = 2k
default_table_type = MyISAM
thread_stack = 192K
transaction_isolation = READ-UNCOMMITTED
tmp_table_size = 512K
max_heap_table_size = 32M
/usr/local/webserver/mysql/data/slow.log
/usr/local/webserver/mysql/data/error.log
long_query_time = 1
log_long_format
server-id = 1
#log-bin = /usr/local/mysql/data/binlog
binlog_cache_size = 2M
max_binlog_cache_size = 4M
max_binlog_size = 512M
expire_logs_days = 7
key_buffer_size = 4M
read_buffer_size = 1M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 2M
myisam_sort_buffer_size = 4M
myisam_max_sort_file_size = 10G
myisam_max_extra_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
[mysqldump]
quick
max_allowed_packet = 16M
port = 3306
socket = /tmp/mysql.sock
basedir = /usr/local/webserver/mysql
datadir = /usr/local/webserver/mysql/data
open_files_limit = 600
back_log = 20
max_connections = 100
max_connect_errors = 200
table_cache = 60
external-locking = FALSE
max_allowed_packet = 16M
sort_buffer_size = 128K
join_buffer_size = 128K
thread_cache_size = 10
thread_concurrency = 8
query_cache_size = 0M
query_cache_limit = 2M
query_cache_min_res_unit = 2k
default_table_type = MyISAM
thread_stack = 192K
transaction_isolation = READ-UNCOMMITTED
tmp_table_size = 512K
max_heap_table_size = 32M
/usr/local/webserver/mysql/data/slow.log
/usr/local/webserver/mysql/data/error.log
long_query_time = 1
log_long_format
server-id = 1
#log-bin = /usr/local/mysql/data/binlog
binlog_cache_size = 2M
max_binlog_cache_size = 4M
max_binlog_size = 512M
expire_logs_days = 7
key_buffer_size = 4M
read_buffer_size = 1M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 2M
myisam_sort_buffer_size = 4M
myisam_max_sort_file_size = 10G
myisam_max_extra_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
[mysqldump]
quick
max_allowed_packet = 16M
linux退出vi编辑器，按ESC 后输入q回车，不保存退出，输入wq是保存退出，输入W是保存不退出。
有空大家看看这个博客，可以了解到更多的linux服务器如何配置优化等。
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