…First, MySQL/InnoDB uses async writes, so this will emulate database load, and second, async…freq=0 –file-block-size=16384 –report-interval=10 run You may see I…in throughput (0 throughput for 20-30 sec period of time). When there …I ran random read sync IO mode, now for 1-64 threads. The throughput:…
Post: Make your file system error resilient
August 24, 2011 By 8 Comments
… of them a second later. What we’re concerned with right now is Errors behavior… reported back to MySQL/Innodb it will assert and restart. Now lets look at…. Maximum mount count: -1 and Check interval: 0 () These corresponds to automatic file… in 5 minutes yet it takes 30+ because it has to check file …
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
…other things. In MySQL 5 number of Innodb performance counters were exported and now available in SHOW STATUS … Per second averages calculated from the last 44 seconds Make sure data is sampled for at least 20-30 seconds. If…as it is hard to get average for interval you want to have, if you’re writing…
Post: Goal driven performance optimization
December 22, 2008 By Leave a Comment
… if it takes you 30 seconds to generate the search results and 3 more seconds to load all style…optimized things and now HTML takes 0.5 seconds to generates an extra 3 seconds become the main …intervals and making sure there are no hiccups. Check the stats from the application above for example: mysql…
Post: Estimating Replication Capacity
July 20, 2010 By 4 Comments
…patches, which is now available …mysql> select * from information_schema.user_statistics where user=”#mysql_system#” \G *************************** 1. row *************************** USER: #mysql…second, out of this replication thread was busy (BUSY_TIME) 74 seconds…Rows exam 30…. minute intervals (or …
Post: Innodb Fuzzy checkpointing woes
May 10, 2006 By Leave a Comment
… have low water value, ie 30% utilized at which we can … the shared drive at shared MySQL virtual hosting and powerful RAID…and you have relatively idle interval of performing just 500 IOs/…can handle 1000 requests per second and the best would be… thing to take into account. Now some good news. As I…
