mysql5.1升级5.5操作步骤
参数的更改：#skip-locking 在5.5里已经不识别了，改成
skip-external-locking
#log-long-format 在5.5里已经不识别了，改成
log-short-format
#log_slow_queries 在5.5里已经不识别了，改成
slow-query-log
#default-character-set = utf8 在5.5里已经不识别了，改成
character-set-server = utf8
basedir = /usr/local/mysql5.5
datadir =/usr/local/mysql5.5/data
innodb_data_home_dir = /usr/local/mysql5.5/data
innodb_log_group_home_dir = /usr/local/mysql5.5/data
user = mysql
#innodb_file_io_threads已经不识别了，改成
innodb_read_io_threads = 8
innodb_write_io_threads = 8
innodb_io_capacity = 2000
innodb_file_format = Barracuda
##增加半同步配置
rpl_semi_sync_master_enabled = 1
rpl_semi_sync_master_timeout = 1000
rpl_semi_sync_slave_enabled = 1
--myisam_max_extra_sort_file_size is deprecated and does nothing in this version.It will be removed in a
future> 第一步：
/usr/local/mysql5.5/bin/mysqld --defaults-file=/etc/my.cnf --skip-grant-tables &
第二步：执行更新程序
# bin/mysql_upgrade
Looking for 'mysql' as: bin/mysql
Looking for 'mysqlcheck' as: bin/mysqlcheck
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock'
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock'
mysql.columns_priv OK
mysql.db OK
mysql.event OK
mysql.func OK
mysql.general_log OK
mysql.help_category OK
mysql.help_keyword OK
mysql.help_relation OK
mysql.help_topic OK
mysql.host OK
mysql.ndb_binlog_index OK
mysql.plugin OK
mysql.proc OK
mysql.procs_priv OK
mysql.servers OK
mysql.slow_log OK
mysql.tables_priv OK
mysql.time_zone OK
mysql.time_zone_leap_second OK
mysql.time_zone_name OK
mysql.time_zone_transition OK
mysql.time_zone_transition_type OK
mysql.user OK
test.heartbeat OK
test.log20111127 OK
test.log20111128 OK
test.log20111129 OK
test.log20111130 OK
test.log20111201 OK
test.log20111202 OK
test.log20111203 OK
test.log20111204 OK
test.log20111205 OK
test.log20111206 OK
test.log20111207 OK
test.t1 OK
test.t2 OK
Running 'mysql_fix_privilege_tables'...
OK
第三步：
/usr/local/mysql5.5/bin/mysqladmin -uroot -p123456 shutdown
第四步：
/usr/local/mysql5.5/bin/mysqld_safe--defaults-file=/etc/my.cnf --user=mysql &
mysql> select version();
+------------+
| version()|
+------------+
| 5.5.19-log |
+------------+
1 row in set (0.00 sec)
mysql> select @@innodb_version;
+------------------+
| @@innodb_version |
+------------------+
| 1.1.8 |
+------------------+
1 row in set (0.00 sec)
mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';
mysql> SET GLOBAL rpl_semi_sync_master_enabled=ON;
mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';
mysql> SET GLOBAL rpl_semi_sync_slave_enabled =ON;
第一次执行完后，就无需再执行了。
至此，升级过程完毕。
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