数据库
首页 > 数据库> > MYSQL数据库 MariaDB断电恢复总结

MYSQL数据库 MariaDB断电恢复总结

作者:互联网

  背景:本次是机房异常断电,导致数据库文件损坏。在数据库自启动之后频繁宕机,在多次尝试以后,总结了一下几种方法,及供参考。

1.mariadb服务器断电重启之后Missing MLOG_CHECKPOINT的报错信息?
  解决办法是,删除data目录下的ib_logfile0、ib_logfile1这两个文件,建议最好备份一份。

2.数据库文件损坏,导致频繁宕机

  编辑 /etc/my.cnf,在[mysqld]小节添加如下两行:
    innodb_force_recover = 3
    innodb_purge_threads = 0

  innodb_force_recovery=3 #mariadb数据库文件损坏重启,当参数值大于3的时候会对数据文件造成永久性的破坏。

  1(SRV_FORCE_IGNORE_CORRUPT):忽略检查到的corrupt页。
  2(SRV_FORCE_NO_BACKGROUND):阻止主线程的运行,如主线程需要执行full purge操作,会导致crash。
  3(SRV_FORCE_NO_TRX_UNDO):不执行事务回滚操作。
  4(SRV_FORCE_NO_IBUF_MERGE):不执行插入缓冲的合并操作。
  5(SRV_FORCE_NO_UNDO_LOG_SCAN):不查看重做日志,InnoDB存储引擎会将未提交的事务视为已提交。
  6(SRV_FORCE_NO_LOG_REDO):不执行前滚的操作。

3.启动命令设置强制回滚

  /usr/sbin/mysqld --skip-grant-tables --general-log &
  service mysql start --tc-heuristic-recover=ROLLBACK

 

[client]
port = 3306
socket = /tmp/mysql.sock

[mysqld]
port = 3306
socket = /tmp/mysql.sock
user = mariadb
basedir = /usr/local/mariadb
datadir = /data/mysql
log_error = /data/mysql/mariadb.err
pid-file = /data/mysql/mariadb.pid
skip-external-locking
key_buffer_size = 64M
max_allowed_packet = 4M
table_open_cache = 256
sort_buffer_size = 4M
net_buffer_length = 18K
read_buffer_size = 4M
read_rnd_buffer_size =2M
myisam_sort_buffer_size = 16M
thread_cache_size = 32
query_cache_size = 32M
tmp_table_size = 64M

explicit_defaults_for_timestamp = true
#skip-networking
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535

log-bin=mysql-bin
binlog_format=mixed
server-id = 1
expire_logs_days = 10

default_storage_engine = InnoDB
innodb_file_per_table = 1
innodb_data_home_dir = /data/mysql
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /data/mysql
innodb_buffer_pool_size = 256M
innodb_log_file_size = 64M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 10
innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 64M
sort_buffer_size = 1M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

 

标签:log,buffer,mysql,断电,innodb,MYSQL,MariaDB,data,size
来源: https://www.cnblogs.com/zengming/p/14551755.html