Infobright and InnoDB AMI images are now available There are now demonstration AMI images for Shard-Query. Each image comes pre-loaded with… favorite storage engine or database About the cluster For best performance, there should be an even data distribution in the system… case in normal circumstances. The extra data will not impact performance because it will never be accessed. Since both InnoDB and…
Post: Goal driven performance optimization
December 22, 2008 By Leave a Comment
… infrastructure cost. If this is the goal you can perform general system performance evaluation and just fix the stuff which causes the… than 100.000 images uploaded and measure the response time for them specifically because this group has its own performance challenges. Looking… mention looking at performance statistics for the day overall is often not enough. Application performs as good as it performs during its worst…
Post: MySQL on Amazon RDS part 1: insert performance
March 15, 2011 By 37 Comments
… cloud-hosted MySQL solution. I’ve had some clients hitting performance limitations on standard EC2 servers with EBS volumes (see SSD… the chart of rows inserted per minute (click on the image for a bigger view): We can deduce a few things… workload is not very revealing. To understand the sustained write performance of an RDS instance, we need a multi-threaded long…
Post: Innodb performance gotcha w Larger queries.
August 28, 2009 By 7 Comments
… ago I was looking for a way to improve update performance for the application and I was replacing single value UPDATE… in the batch performance improved, especially for network tests, however going to batches of 100 and 1000 values performance started to degrade… to 60 times ! I looked at the oprofile results: samples % image name app name symbol name 312528 53.8091 mysqld mysqld…
Post: Sysbench evaluation of iSCSI performance
July 6, 2006 By 2 Comments
Partha Dutta posted pretty interesting post about iSCSI vs SCSI performance using SysBench. This is nice to finally see some iSCSI… pretty small and would typically keep load CPU bound) The image with results raises a lot of questions – why load is…() otherwise loosing database content might be the price for improved performance. In general I’m pretty optimistic about iSCSI technology and…
Post: High-Performance Click Analysis with MySQL
December 22, 2008 By 13 Comments
… most common questions we hear is how to build high-performance systems to do this work. Let’s see some ways you can build the functionality you need and get the performance you need. Because I’ve built two such systems to…, so I call it dog-earing the table (somehow the image of putting columns next to each other makes me think…
Post: Content delivery system design mistakes
February 11, 2007 By 9 Comments
This week I helped dealing with performance problems (part MySQL related and part related to LAMP in … especially for “aggregate” pages which may require images to be pulled from 10 different image servers. Keep Alive In my previous post… files (which does not fit in memory) you can have performance to go down as request will be frequently made to…
Post: COUNT(*) for Innodb Tables
December 1, 2006 By 29 Comments
… the table from stored value. Innodb will however need to perform full table scan or full index scan because it does…(*) FROM IMAGE WHERE USER_ID=5 this query will be executed same way both for MyISAM and Innodb tables by performing index… have 123.345 users which have uploaded 1.344.656 images” but these are normally easy to remove. So remember Innodb…
Post: Are PHP persistent connections evil ?
November 12, 2006 By 31 Comments
… MySQL connection open, others will serve static content such as images which also does not need MySQL connection open. In optimal… the time so they should not handle keep alive serve images or perform spoon feeding. You can place squid in front, use…. Even though you could misuse persistent connections and get poor performance that was not the reason. The real reason is – you…
Comment: XtraDB Amazon Image
October 29, 2009 By 9 Comments
Andrew, The mentioned image has default mysql options. However in future there will be images tuned for the best performance for specific workloads/instance types.
