[MySQL工具] pt-query-digest使用出错问题分析Can't locate Tim_MySQL

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[MySQL工具] pt-query-digest使用出错问题分析Can't locate Time/HiRes.pm in @INC

pt-query-digest ：分析查询执行日志，并产生一个查询报告

[root@472322 percona-toolkit-2.2.5]# pt-query-digest --help

Can't locate Time/HiRes.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/local/bin/pt-query-digest line 3187.

BEGIN failed--compilation aborted at /usr/local/bin/pt-query-digest line 3187.

解决方案：

.pm实际上是Perl的包，只需安装如下软件包即可：

yum install -y perl-Time-HiRes

[root@472322 percona-toolkit-2.2.5]# yum install perl-Time-HiRes

Loaded plugins: dellsysid, fastestmirror, presto

Loading mirror speeds from cached hostfile

* base: mirror.rackspace.com

* dell-community: linux.dell.com

* epel: fedora-epel.mirror.lstn.net

* extras: mirrordenver.fdcservers.net

* updates: centos.mirror.lstn.net

Setting up Install Process

Resolving Dependencies

--> Running transaction check

---> Package perl-Time-HiRes.x86_64 4:1.9721-131.el6_4 will be installed

--> Finished Dependency Resolution

Dependencies Resolved

=======================================================================================================================================================================

Package Arch Version Repository Size

=======================================================================================================================================================================

Installing:

perl-Time-HiRes x86_64 4:1.9721-131.el6_4 updates 47 k

............................... 此处省略..............................

Running Transaction

Installing : 4:perl-Time-HiRes-1.9721-131.el6_4.x86_64 1/1

Verifying : 4:perl-Time-HiRes-1.9721-131.el6_4.x86_64 1/1

Installed:

perl-Time-HiRes.x86_64 4:1.9721-131.el6_4

Complete!

Ok，可以查看 pt-query-digest工具的功能介绍了：

[root@472322 percona-toolkit-2.2.5]# pt-query-digest --help

pt-query-digest analyzes MySQL queries from slow, general, and binary log files.

It can also analyze queries from C and MySQL protocol data

from tcpdump. By default, queries are grouped by fingerprint and reported in

descending order of query time (i.e. the slowest queries first). If no C

are given, the tool reads C. The optional C is used for certain

options like L and L. For more details, please use the

--help option, or try 'perldoc /usr/local/bin/pt-query-digest' for complete

documentation.

Usage: pt-query-digest [OPTIONS] [FILES] [DSN]

Options:

--ask-pass Prompt for a password when connecting to MySQL

--attribute-aliases=a List of attribute|alias,etc (default db|Schema)

--attribute-value-limit=i A sanity limit for attribute values (default

4294967296)

--charset=s -A Default character set

--config=A Read this comma-separated list of config files;

if specified, this must be the first option on

the command line

--[no]continue-on-error Continue parsing even if there is an error (

default yes)

--[no]create-history-table Create the --history table if it does not exist (

default yes)

--[no]create-review-table Create the --review table if it does not exist (

default yes)

--daemonize Fork to the background and detach from the shell

--database=s -D Connect to this database

--defaults-file=s -F Only read mysql options from the given file

--embedded-attributes=a Two Perl regex patterns to capture pseudo-

attributes embedded in queries

....................................

分析本地的慢查询文件:

pt-query-digest --user=root --password=m@123 /data/dbdata/localhost-slow.log

重新回顾满查询日志，并将结果保存到query_review中，注意query_review表的表结构必须先建好，表结构如下：

CREATE TABLE query_review (

checksum BIGINT UNSIGNED NOT NULL PRIMARY KEY,

fingerprint TEXT NOT NULL,

sample TEXT NOT NULL,

first_seen DATETIME,

last_seen DATETIME,

reviewed_by VARCHAR(20),

reviewed_on DATETIME,

comments TEXT

);

命令如下：

pt-query-digest --user=root --password=m@123 --review h=localhost,D=test,t=query_review /data/dbdata/localhost-slow.log

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