innodb_log_buffer_size = 8M

default-storage-engine=innodb

innodb_flush_log_at_trx_commit = 1

# Set .._log_file_size to 25 % of buffer pool size

#innodb_log_file_size = 5M

#innodb_log_buffer_size = 8M

#innodb_flush_log_at_trx_commit = 1

#innodb_lock_wait_timeout = 50

innodb_flush_log_at_trx_commit = 2

[mysqldump]

quick

max_allowed_packet = 16M

[mysqld_safe]

log-error=/home/fc/app/mysql/log/3307/mysqld.log

pid-file=/home/fc/app/mysql/tmp/3307/mysql.pid

[mysql]

no-auto-rehash

port = 3307

socket = /home/fc/app/mysql/tmp/3307/mysql.sock

# Remove the next comment character if you are not familiar with SQL

#safe-updates

[myisamchk]

key_buffer_size = 20M

sort_buffer_size = 20M

read_buffer = 2M

write_buffer = 2M

www.2cto.com

[mysqlhotcopy]

interactive-timeout

好了，一切都准备好了，可以启动了

二、启动mysqld进程

进入basedir目录fc/app/mysql

mysql]$ cd bin

bin]$ mysqld_safe --defaults-file=~/my.cnf &

启动成功了，查看进程

ps -ef | grep mysqld 发现问题了

[plain]

fc 7780 7582 24 16:42 pts/10 00:00:00 /usr/local/mysql/bin/mysqld --defaults-file=~/my.cnf --basedir=/home/fc/app/mysql --datadir=/home/fc/app/mysql/data/3307/ --log-error=/home/fc/app/mysql/log/3307/mysqld.log --pid-file=/home/fc/app/mysql/tmp/3307/mysql.pid --socket=/home/fc/app/mysql/tmp/3307/mysql.sock --port=3307

发现没有，虽然进入的fc/app/mysql/bin目录下启动的mysqld程序，但是查找进程时候却是运行的/usr/lcoal/mysql下的mysqld，这是为什么呢？

查找了很久的参数，都发现没有配置错误，始终不得其解，如是换了种启动方式：

进入base目录fc/app/mysql

mysql]$ bin/msyqld_safe --defaults-file=~/my.cnf &

这样启动后再查找mysqld进程，一切就正常了，这是为什么呢？

我自己想的原因可能是：

mysqld_safe本身就是mysqld的守护进程，它本身也是一个shell脚本，在脚本中，默认的basedir就是：usr/local/mysql，我们在启动mysqld的时候如果进入了bin目录，则在这个守护进程中是找不到该目录的，如是就去自动匹配/usr/local/mysql/这个目录，刚好我也在这个目录之前装过mysql，于是 系统就自动匹配了这个mysqld程序，运行起来了。

我们查看下mysqld_safe的一段shell代码：

[python]

MY_PWD=`pwd`

# Check for the directories we would expect from a binary release install

if test -n "$MY_BASEDIR_VERSION" -a -d "$MY_BASEDIR_VERSION"

then

# BASEDIR is already overridden on command line. Do not re-set.

# Use BASEDIR to discover le.

if test -x "$MY_BASEDIR_VERSION/libexec/mysqld"

then

ledir="$MY_BASEDIR_VERSION/libexec"

elif test -x "$MY_BASEDIR_VERSION/sbin/mysqld"

then

ledir="$MY_BASEDIR_VERSION/sbin"

else

ledir="$MY_BASEDIR_VERSION/bin"

fi www.2cto.com

elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/bin/mysqld"

then

MY_BASEDIR_VERSION="$MY_PWD" # Where bin, share and data are

ledir="$MY_PWD/bin" # Where mysqld is

# Check for the directories we would expect from a source install

elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/libexec/mysqld"

then

MY_BASEDIR_VERSION="$MY_PWD" # Where libexec, share and var are

ledir="$MY_PWD/libexec" # Where mysqld is

elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/sbin/mysqld"

then

MY_BASEDIR_VERSION="$MY_PWD" # Where sbin, share and var are

ledir="$MY_PWD/sbin" # Where mysqld is