… graph actually doesn’t show a ratio — it just shows the absolute values of the reads, writes, and creates per second, stacked on top of each other. The person was mentally comparing them and creating a ratio… already know about, not for trying to discover problems. Your monitoring and alerting system (Nagios?) should be trying to discover whether…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
…”OS Waits” for mutexes, as well as for read-write locks. For these information both for exclusive locks…is great for graphing and monitoring. “16384 avg bytes/read” shows average size of read requests. For random IO…merged and how many merges did it took. Ratio of number of merges to number of inserts…
Post: How to Monitor MySQL with Percona's Nagios Plugins
February 22, 2012 By 11 Comments
…incidents, and their causes and preventions. You can read more about that research in our white papers,… LVM snapshots that don’t have enough copy-on-write space can fail before the backup completes. The… STATUS that you want. If you want to monitor ratios and rates, for example, you can certainly do …
Post: Thoughts on MySQL Replication
July 7, 2006 By 18 Comments
… write scaling. As Brian writes this works best for read intensive envinronments. Write scaling however can be real problem. Not moderate increase of write ratio can…. Besides monitoring which Brian mentioned three other approaches could be used. First is to use master for real time reads when you…
Post: Living with backups
November 6, 2008 By 28 Comments
…read or write whatever comes so that your favorite website can still show up in the browser. Moreover, reads…garbage” for no good reason. Since the hit ratio becomes worse as the cache is being … to constantly monitor the database status and if any problems were noticed, the monitoring would simply …
Post: Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
… which is being requested via read-ahead. Q27 If my workload has a hi amount of concurrent writes to about 6 tables… disk controller write-back cache does the same thing. PZ: First Indeed writes are slower with Flash disks compared to Reads because Flash… the various stuff that will be running (monitoring, backup, cron, syslog, etc). But the ratio of RAM used for these non-mysql…
Post: KISS KISS KISS
March 1, 2009 By 7 Comments
…replication capacity. I would suggest measure and monitor your replication capacity (how long will it…replication topologies with multiple tiers filtering and writes to some intermediary slaves people use. For… often report 90% cache hit ratio meaning 10 to 1 read ratio drop backs to one to …
