… of threads and with measurements every 1 sec to see how bad are drops. So there is more or less stable… course PCIe still provides better numbers, but the question is how much MySQL can use. In his keynote Mark Callaghan mentioned… the performance variance we see it is a good question how does it affect MySQL performance, and I am going to…
Comment: Testing Virident FlashMAX 1400
May 10, 2012 By 3 Comments
… data to compare the individual impact of the separate variables. How does the new Cisco hardware effect of another well performing vendor? How much does “turbo” and “max performance” affect card performance? I…
Post: New distribution of random generator for sysbench - Zipf
May 9, 2012 By 3 Comments
… one. This distribution has a parameter θ (theta), which defines how skewed the distribution is. A physical sense of this parameter… run row lookup 1 million times. There are histograms on how many times each row selected for different θ: 0.5…
Comment: Multi Column indexes vs Index Merge
May 8, 2012 By 30 Comments
… and Delete queries. Is it true? And if is it, how could i balance the choice??? too many indexes and high performance select or high perfomance update with few indexes??? how balance it??? I wait for a your answer! Thank u…
Comment: ext4 vs xfs on SSD
May 3, 2012 By 23 Comments
… MySQL, but I’m not sure how frequently they benchmark XFS vs ext4, and how much of their recommendation comes from the…
Comment: Moving Subtrees in Closure Table Hierarchies
May 2, 2012 By 7 Comments
… regions in a database using MySQL and I’m wondering how can I create a unordered list with indentation (for each… each and can be more or less in the future. How can reordered the receive data correctly to do so ? I…
Comment: Percona MySQL Training Schedule for May, June, & July
April 25, 2012 By 5 Comments
Sure, let’s see how I can help you guys. I have a few thoughts we could start with. How can I contact you?
Comment: ext4 vs xfs on SSD
April 25, 2012 By 23 Comments
… that or another product/filesystem? For me – amount of bugs (how stable it is) is one of most important factors. We… recommendation that they can use today, now in production deployment. How stable will be product is 2 years is rather theoretical…
Comment: Benchmarking single-row insert performance on Amazon EC2
May 16, 2012 By 11 Comments
@Time Callaghan, I did not test with innodb_flush_log_at_trx_commit=1 because the durability requirements are not that stringent. And following is how I invoked iiBench: iibench -T $tbl_name -D iiBench -r 200000000 -M 1 -s 1000000 -t 100000 -I 1 -a -S
Comment: How to track down the source of Aborted_connects
May 15, 2012 By 17 Comments
I know this is an old post, but I’m hoping it’s still monitored. Do you have any suggestions on how to accomplish something similar but with a socket rather than TCP?
