Monitoring MySQL with OpenTSDBPercona live 2013 Geoffrey Anderson, Box Inc.

@geodbz

WhoGeoffrey Anderson• Database Operations Engineer @ Box, Inc.

• a.k.a. DBA• Tooling for MySQL and HBase• #DBHangOps

TheSituation

ThenYouGetMoreServers

Enter OpenTSDB

OpenTSDB is...

• Distributed• Scalable• Time Series Database• Runs on HBase• Created By

Benoit Sigoure

HBase

TSD for Querying

mydb.example.com

HAProxy

fe1.example.com

TSD for Storing

Push Metrics

Query via API

• FAST• EASY to Scale• EASY to Populate

• EASY to collect data• EASY to Query

Why OpenTSDB?

Collecting Data

#!/usr/bin/env bashtimestamp=$(date +%s) mysql -ss -e "SHOW GLOBAL STATUS" | while read var valdo echo "mysql.$var $timestamp $val host=$HOSTNAME"done

ganderson@mydb.example.com:~$ _./mysql_collector.shmysql.Aborted_connects 1366399993 0 host=mydb.example.commysql.Binlog_cache_disk_use 1366399993 0 host=mydb.example.commysql.Binlog_cache_use 1366399993 0 host=mydb.example.commysql.Binlog_stmt_cache_disk_use 1366399993 0 host=mydb.example.commysql.Binlog_stmt_cache_use 1366399993 0 host=mydb.example.commysql.Bytes_received 1366399993 19453687 host=mydb.example.commysql.Bytes_sent 1366399993 1238166682 host=mydb.example.commysql.Com_admin_commands 1366399993 1 host=mydb.example.commysql.Com_assign_to_keycache 1366399993 0 host=mydb.example.com...

Example: mysql_collector.sh

#!/usr/bin/env bashtimestamp=$(date +%s) mysql -ss -e "SHOW GLOBAL STATUS" | while read var valdo echo "mysql.$var $timestamp $val host=$HOSTNAME"done

ganderson@mydb.example.com:~$ _./mysql_collector.shmysql.Aborted_connects 1366399993 0 host=mydb.example.commysql.Binlog_cache_disk_use 1366399993 0 host=mydb.example.commysql.Binlog_cache_use 1366399993 0 host=mydb.example.commysql.Binlog_stmt_cache_disk_use 1366399993 0 host=mydb.example.commysql.Binlog_stmt_cache_use 1366399993 0 host=mydb.example.commysql.Bytes_received 1366399993 19453687 host=mydb.example.commysql.Bytes_sent 1366399993 1238166682 host=mydb.example.commysql.Com_admin_commands 1366399993 1 host=mydb.example.commysql.Com_assign_to_keycache 1366399993 0 host=mydb.example.com...

Example: mysql_collector.sh

Metric name Timestamp Value “Tags” (key=val)

* * * * * mysql_collector.sh | nc opentsdb.example.com 4242

Example: adding a cron for OpenTSDB

ganderson@mydb.example.com:tcollector$ tree.|-- collectors| |-- 0| | |-- ifstat.py| | |-- iostat.py| | |-- procnettcp.py| | |-- procstats.py| |-- 15| | `-- dfstat.py| |-- 30| | |-- mysql_collector.sh| |-- 300 | | `-- ptTcpModel.sh| `-- etc | |-- config.py|-- config|-- startstop`-- tcollector.py

Run forever

Run every 15 seconds

Run every 5 minutes

Run every 30 seconds

QueryingData

http://opentsdb.example.com/#start=2013/04/10-07:32:29&end=2013/04/10-07:57:57&m=sum:proc.stat.cpu.percentage_idle{host=db22}&o=axis x1y1&m=sum:db.threads_running{host=db22}&o=axis x1y2&ylabel=CPU idle&y2label=Threads Running&yrange=[0:]&wxh=1475x600&png

http://opentsdb.example.com/q?start=2013/04/10-07:32:29&end=2013/04/10-07:57:57&m=sum:proc.stat.cpu.percentage_idle{host=db22}&o=axis x1y1&m=sum:db.threads_running{host=db22}&o=axis x1y2&ylabel=CPU idle&y2label=Threads Running&yrange=[0:]&ascii

Leveraging OpenTSDB For MySQL

user_statistics monitoring

table_statistics monitoring

Table Info from I_S

SELECT *, DATA_LENGTH+INDEX_LENGTH AS TOTAL_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA NOT IN ('PERFORMANCE_SCHEMA','INFORMATION_SCHEMA')

Query Throughput

And other “common” metrics

• Various MySQL status counters• QPS (questions)• Threads connected• Temporary tables on disk• Etc.

• Various server statistics• %CPU Idle• Free disk space• I/O utilization• Network traffic• Etc.

Future collectors

• pt-query-digest/mysqlslow query statistics• Data from “show engine innodb status”• (that is missing from counters)

• PERFORMANCE_SCHEMA (MySQL 5.6+)• Query statistics• Processlist information• Background thread information

How does this change things?

In all seriousness, though...

• Easily see aggregate graphs• Easily build graphs on-the-fly• Full granularity forever• API request for raw data• Cluster-wide nagios checks with check_tsd

Challenges Switching• Aggregates are the default• Mouse-zooming (patched!)• Auto-suggest for metrics• “The graphs aren’t pretty”• Migrating from proof of concept

• Plan for 3+ machines• Data pruning may be required

Some QuickNumbers OpenTSDB @ Box

21,294 metrics 72 tag keys 5,145,745 tag values 90% Interactive graphs

return <300ms

Next Steps

Enjoy #PerconaLive 2013We’re hiring!

https://www.box.com/about-us/careers/geoff@box.com

Image credits

http://upload.wikimedia.org/wikipedia/commons/7/7b/Batelco_Network_Operations_Centre_(NOC).JPG http://www.flickr.com/photos/hoyvinmayvin/5873697252/ http://www.percona.com/doc/percona-monitoring-plugins http://www.2cto.com/uploadfile/2012/0731/20120731112415744.jpg http://media.tumblr.com/tumblr_lvfspoenWU1qi19a2.png http://img.izismile.com/img/img4/20110527/640/you_can_be_a_superhero_640_01.jpg http://openclipart.org/image/250px/svg_to_png/26427/Anonymous_notebook.png http://images.alphacoders.com/768/2560-1600-76893.jpg http://www.flickr.com/photos/in365/4861180503/ http://openclipart.org/image/250px/svg_to_png/130915/Prohibido_3D.png http://www.flickr.com/photos/61114149@N02/5566484951/ http://opentsdb.net/img/tsd-sample.png http://images2.wikia.nocookie.net/__cb20080911160202/bttf/images/5/57/WhatdidItellyou-HQ.jpg http://www.flickr.com/photos/lisakayaks/3028350539/ http://www.flickr.com/photos/25566302@N00/1472400115 http://www.flickr.com/photos/grandmaitre/5846058698/ http://www.flickr.com/photos/7518432@N06/2673347604/