淘宝数据库监控工具orzdba使用说明
代码SVN地址:
http://code.taobao.org/p/orzdba/src/trunk/
说明:
Perl脚本,用于对Linux主机和MySQL相关指标进行实时监控。
工具主要有如下参数:
1、查看Linux主机指标
-l,–load Print Load Info.
-c,–cpu Print Cpu Info.
-s,–swap Print Swap Info.
-d,–disk Print Disk Info.
-n,–net Print Net Info.
-sys Print SysInfo (include -t,-l,-c,-s)
这些指标的数据都来自/proc目录下的相关系统元数据:
LOAD : /proc/loadavg
CPU : /proc/stat
SWAP : /proc/vmstat
DISK : /proc/diskstats
NET : /proc/net/dev
其中,查看DISK(-d)和NET(-n)需要带具体的设备名(具体可以查看/proc/diskstats和/proc/net/dev中的设备或者可以取自iostat和sar -n DEV)。
2、查看MySQL指标
通过show variables列出经常关注的核心变量。
通过show global status列出相关MYSQL status信息。
-com
Print MySQL Status(Com_select,Com_insert,Com_update,Com_delete).
-hit
Print Innodb Hit%.
Hit% : (Innodb_buffer_pool_read_requests – Innodb_buffer_pool_reads) / Innodb_buffer_pool_read_requests * 100%
-innodb_rows
Print Innodb Rows Status(Innodb_rows_inserted/updated/deleted/read).
-innodb_pages
Print Innodb Buffer Pool Pages Status(Innodb_buffer_pool_pages_data/free/dirty/flushed)
-innodb_data
Print Innodb Data Status(Innodb_data_reads/writes/read/written)
-innodb_log
Print Innodb Log Status(Innodb_os_log_fsyncs/written)
-innodb_status
Print Innodb Status from Command: ‘Show Engine Innodb Status‘ (history list/ log unflushed/uncheckpointed bytes/ read views/ queries inside/queued)
其中:
log unflushed = Log sequence number – Log flushed up to
uncheckpointed bytes = Log sequence number – Last checkpoint at
-T,–threads
Print Threads Status(Threads_running,Threads_connected,Threads_created,Threads_cached).
-B,–bytes
Print Bytes received from/send to MySQL(Bytes_received,Bytes_sent).
-mysql
Print MySQLInfo (include -t,-com,-hit,-T,-B).
-innodb
Print InnodbInfo(include -t,-innodb_pages,-innodb_data,-innodb_log,-innodb_status)
3、查看MySQL的响应时间
-rt Print MySQL DB RT(us).
通过调用tcprstat来监控MySQL的响应时间。
-rt中列的具体意义参考http://www.percona.com/docs/wiki/tcprstat:start 中的解释。
-rt参数依赖:
(1)需要安装tcprstat
由于安装后运行tcprstat需要root用户,或者sudo进行,可以通过如下命令来避免:
$sudo chown root:root /usr/bin/tcprstat
$sudo chmod u+s /usr/bin/tcprstat
$ll /usr/bin/tcprstat
-rwsr-xr-x 1 root root 1183465 May 28 15:38 /usr/bin/tcprstat
默认工具读取tcprstat的代码如下:
$grep -n ‘my $TCPRSTAT’ orzdba
166:my $TCPRSTAT = “/usr/bin/tcprstat –no-header -t 1 -n 0 -p $port”;
不同的路径可以自行修改。
(2)需要安装Perl的File::Lockfile模块
File::Lockfile模块同时要依赖Module-Build/version/Class-Data-Inheritable这3个模块,可以通过下面方式进行安装:
安装version模块:
$wget http://search.cpan.org/CPAN/authors/id/J/JP/JPEACOCK/version-0.99.tar.gz
$tar -zxvf version-0.99.tar.gz
$cd version-0.99
$perl Makefile.PL
$make
$make test
$sudo make install
安装Class-Data-Inheritable模块:
$wget http://search.cpan.org/CPAN/authors/id/T/TM/TMTM/Class-Data-Inheritable-0.08.tar.gz
$tar -zxvf Class-Data-Inheritable-0.08.tar.gz
$cd Class-Data-Inheritable-0.08
$perl Makefile.PL
$make
$make test
$sudo make install
安装Module-Build模块:
$wget http://search.cpan.org/CPAN/authors/id/K/KW/KWILLIAMS/Module-Build-0.31.tar.gz
$tar -zxvf Module-Build-0.31.tar.gz
$cd Module-Build-0.31
$perl Build.PL
$./Build
$./Build test
$sudo ./Build install
安装安装File::Lockfile模块:
$wget http://search.cpan.org/CPAN/authors/id/G/GL/GLORYBOX/File-Lockfile-v1.0.5.tar.gz
$tar -zxvf File-Lockfile-v1.0.5.tar.gz
$cd File-Lockfile-v1.0.5
$perl Build.PL
$perl ./Build
$perl ./Build test
$sudo perl ./Build install
可以通过如下脚本,检查安装了哪些perl模块的脚本:
$cat check_module.pl
#!/usr/bin/perl
use ExtUtils::Installed;
my $inst = ExtUtils::Installed->new();
print join “\n”,$inst->modules();
print “\n”;
4、其他
(1)MySQL相关参数配置
-P,–port Port number to use for mysql connection(default 3306).
-S,–socket Socket file to use for mysql connection.
用于指定端口或者socket。
如果需要MYSQL的其他参数要添加,直接改代码:
$grep -n -A1 ‘my $MYSQL’ orzdba
166:my $MYSQL = qq{mysql -s –skip-column-names -uroot -P$port };
167-$MYSQL .= qq{-S$socket } if defined $socket;
(2)控制输出间隔和次数,以及是否输出颜色。
-h,–help Print Help Info.
-i,–interval Time(second) Interval.
-C,–count Times.
-t,–time Print The Current Time.
-nocolor Print NO Color.
(3)日志输出
-L,–logfile Print to Logfile.
-logfile_by_day One day a logfile,the suffix of logfile is ‘yyyy-mm-dd’; and is valid with -L.
用于将数据输出到日志文件-L后面带输出的日志文件,另外如果加上-logfile_by_day参数的话,将按天输出日志。