解压pt软件
# tar xfz percona-toolkit-3.0.2_x86_64.tar.gz

安装对应的perl依赖包
# yum install perl-DBI
# yum install perl-DBD-MySQL

执行pt-duplicate-key-checker命令

# ./bin/pt-duplicate-key-checker -uroot -pcnstrong#123454321 -S /data/mysql01/mysql.sock
# ########################################################################
# beike.ls_lesson
# ########################################################################
# index_lesson_classSubjId is a left-prefix of index_lesson_classSubjId_startTime
# Key definitions:
# KEY `index_lesson_classSubjId` (`classSubjId`),
# KEY `index_lesson_classSubjId_startTime` (`classSubjId`,`startTime`)
# Column types:
# `classsubjid` bigint(20) default null comment '????id'
# `starttime` timestamp null default null comment '????'
# To remove this duplicate index, execute:
ALTER TABLE `beike`.`ls_lesson` DROP INDEX `index_lesson_classSubjId`;
# ########################################################################
# course.QRTZ_BLOB_TRIGGERS
# ########################################################################
# SCHED_NAME is a duplicate of PRIMARY
# Key definitions:
# KEY `SCHED_NAME` (`SCHED_NAME`,`TRIGGER_NAME`,`TRIGGER_GROUP`),
# PRIMARY KEY (`SCHED_NAME`,`TRIGGER_NAME`,`TRIGGER_GROUP`),
# Column types:
# `sched_name` varchar(120) not null
# `trigger_name` varchar(200) not null
# `trigger_group` varchar(200) not null
# To remove this duplicate index, execute:
ALTER TABLE `course`.`QRTZ_BLOB_TRIGGERS` DROP INDEX `SCHED_NAME`;
# ########################################################################
# course.QRTZ_FIRED_TRIGGERS
# ########################################################################
# IDX_QRTZ_FT_TRIG_INST_NAME is a left-prefix of IDX_QRTZ_FT_INST_JOB_REQ_RCVRY
# Key definitions:
# KEY `IDX_QRTZ_FT_TRIG_INST_NAME` (`SCHED_NAME`,`INSTANCE_NAME`),
# KEY `IDX_QRTZ_FT_INST_JOB_REQ_RCVRY` (`SCHED_NAME`,`INSTANCE_NAME`,`REQUESTS_RECOVERY`),
# Column types:
# `sched_name` varchar(120) not null
# `instance_name` varchar(200) not null
# `requests_recovery` varchar(1) default null
# To remove this duplicate index, execute:
ALTER TABLE `course`.`QRTZ_FIRED_TRIGGERS` DROP INDEX `IDX_QRTZ_FT_TRIG_INST_NAME`;

ITPub博客

MySQL使用pt-duplicate-key-checker找出冗余、重复索引

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