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fil_init 主要是初始化文件打开指针哈希表,所有打开的文件全记录在 fil_system 之中,构造按名字查找的哈希表 buf_pool_init 内存缓冲池的初始化,对应 buf_pool_ptr 数组之中,还初始化了 adaptive hash index 的内存log_init 初始化log缓冲区,默认大小为 512*16k, 每个log页面大小为 #define OS_FILE_LOG_BLOCK_SIZE  512  日志文件在创建过程中也是指定不用系统缓存 lock_sys_create 初始化系统锁,就是建了一个HASH表,lock_sys recv_recovery_from_checkpoint_start 开始执行恢复dict_boot 初始化表结构的缓存,dict_sys,建两个hash表,可以根据表名和表ID查找;初始化系统表,就四个 SYS_TABLES SYS_COLUMNS SYS_INDEXES SYS_FIELDS ;初始化 insert buffer,每一个表空间对应一个;读入上面四个系统表中的内容trx_sys_init_at_db_start 初初化事务结构体 trx_sys ; Creates the global purge system control structure and inits the history dict_create_or_check_foreign_constraint_tables 创建另外两张系统表 SYS_FOREIGN SYS_FOREIGN_COLS启动的线程,IO部分共10个,可通过参数配置1个 insert buffer thread1个 log thread4个 aio read thread4个 aio write thread 1个 lock timeout thread      A thread which wakes up threads whose lock wait may have lasted too long1个 error monitor thread    A thread which prints warnings about semaphore waits which have lasted too long1个 monitor thread           A thread which prints the info output by various InnoDB monitors1个 master thread           The master thread controlling the server 1个 thread handle shutdown1个 handle connections socket 专门用来处理连理的1个 trx_rollback_or_clean_all_recovered Rollback the uncommitted transactions which have no user   session struct st_mysql_plugin *mysql_optional_plugins[]=
{
   builtin_innobase_plugin, builtin_perfschema_plugin, builtin_partition_plugin, 0
};struct st_mysql_plugin *mysql_mandatory_plugins[]=
{
  builtin_binlog_plugin, builtin_mysql_password_plugin,  builtin_csv_plugin, builtin_heap_plugin, builtin_myisam_plugin, builtin_myisammrg_plugin, 0
};
初始化的 binlog memory myisam innodb pefformance_schema partition DB2游标使用注意事项CentOS下MySQL卸载和安装相关资讯      MySQL数据库教程 
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