mysql报错
1. 环境说明CentOS 6.5
# uname -a
Linux linux-mysql02 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
2. 问题描述
编译安装MySQL-5.6.37和二进制安装MySQL-5.6.37，在初始化mysql后，它会自动在MYSQL_BASE目录下（/u02/mysql-5.6.37）生成一个my.cnf的文件，当然，在/etc/目录下，它也会自动生成my.cnf，但是在启动mysql之前被mv为my.cnf.bak了，所以mysql的第一生效文件就变为了/u02/mysql-5.6.37/my.cnf。
在需要配置binlog时，打开my.cnf看到mysqld模块下只有这一句没有注释的，在网上找了下资料（https://segmentfault.com/a/1190000005936172）：
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
稍微看了下这个模块的作用，才有了注释掉，然后重新写个my.cnf
# cat /etc/my.cnf
port = 3306
socket = /tmp/mysql.sock
no-auto-rehash
user = mysql
port = 3306
#socket= /tmp/mysql.sock
#basedir = /u02/mysql
datadir = /u02/mysql-5.6.37/data
open_files_limit = 1024
back_log = 600
max_connections = 800
max_connect_errors = 3000
#table_cache = 614
external-locking = FALSE
max_allowed_packet =8M
sort_buffer_size = 1M
join_buffer_size = 1M
thread_cache_size = 100
thread_concurrency = 2
query_cache_size = 2M
query_cache_limit = 1M
query_cache_min_res_unit = 2k
#default_table_type = InnoDB
thread_stack = 192K
#transaction_isolation = READ-COMMITTED
tmp_table_size = 2M
max_heap_table_size = 2M
long_query_time = 1
#log_long_format
#log-error = /data/3306/error.log
##log-slow-queries = /data/3306/slow.log
##pid-file = /data/3306/mysql.pid
##log-bin = /tmp/mysql-bin
##relay-log = /data/3306/relay-bin
##relay-log-info-file = /data/3306/relay-log.info
binlog_cache_size = 1M
max_binlog_cache_size = 1M
max_binlog_size = 2M
expire_logs_days = 7
key_buffer_size = 16M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
bulk_insert_buffer_size = 1M
#myisam_sort_buffer_size = 1M
#myisam_max_sort_file_size = 10G
#myisam_max_extra_sort_file_size = 10G
#myisam_repair_threads = 1
#myisam_recover
lower_case_table_names = 1
skip-name-resolve
slave-skip-errors = 1032,1062
replicate-ignore-db=mysql
server-id = 1
innodb_additional_mem_pool_size = 4M
innodb_buffer_pool_size = 32M
innodb_data_file_path = ibdata1:128M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 2M
innodb_log_file_size = 4M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = 0
quick
max_allowed_packet = 2M
log-error=/tmp/mysql_oldboy3306.err
##pid-file=/data/3306/mysqld.pid
保存退出，重新启动：
# /etc/init.d/mysqld start
Starting MySQL. ERROR! The server quit without updating PID file (/u02/mysql-5.6.37/data/linux-mysql02.pid).
报错！！！
查看错误日志：
# vim /tmp/mysql_oldboy3306.err
2017-08-12 18:13:18 28414 InnoDB: auto-extending data file ./ibdata1 is of a different> in the .cnf file: initial 8192 pages, max 0 (relevant if non-zero) pages!
2017-08-12 18:13:18 28414 InnoDB: Could not open or create the system tablespace. If you tried to add new data files to the system tablesp
ace, and it failed here, you should now edit innodb_data_file_path in my.cnf back to what it was, and remove the new ibdata files InnoDB created i
n this failed attempt. InnoDB only wrote those files full of zeros, but did not yet use them in any way. But be careful: do not remove old data fi
les which contain your precious data!
2017-08-12 18:13:18 28414 Plugin 'InnoDB' init function returned error.
2017-08-12 18:13:18 28414 Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-08-12 18:13:18 28414 Unknown/unsupported storage engine: InnoDB
2017-08-12 18:13:18 28414 Aborting
1、原来的ibdata1大小为：768*16/1024=12M
2、当前ibdata1被修改为：8192*16/1024=128M
innodb_data_file_path = ibdata1:128M:autoextend
发现我现在的大小就是128M，这边改为12M试试
# /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!
成功启动！！！
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