June 19, 2013

Post: Flexviews - part 3 - improving query performance using materialized views

result setCompared the refresh performance and query resultsmysql> select sum(total_lines) from complete_example2 ; +——————+ | sum(total_lines) | +——————+ | 155186550 | +——————+ 1 row in set (0.68 sec) Conclusion Flexviews supports two

Post: Cache Performance Comparison

… has compared performance of MySQL Query Cache and File Cache. Jay uses Apache Benchmark to compare full full… same system. I used two baselines for comparison. First is speed of PHP Associative array. This …/sec and it is almost doubled if result sets are cached from query cache. Pretty impressive. …

Post: Shard-Query EC2 images available

…compression ratio(compared to Innodb, 8:1 compared to …php genconfig 20 > shards.ini Running the test For best performance, you should run the workers on one or tworesults cd shard-query/ $ ./run_query < queries.sql | tee raw |./pivot_results & …mysql wait-timeout=86400 To be continued You can now set

Page: Presentations

comparing it to the alternatives. Slides by Andrew Aksenoff, Russian Language. Download MySQLresults outdate pretty quickly. Download MySQL Performance 5.0 vs 4.1 MySQL

Post: Heikki Tuuri answers to Innodb questions, Part II

…ahead depth here. These settings mean there can …, crashes, or wrong query results get the highest priority…fixed: http://bugs.mysql.com/bug.php?id=29560 Concerning…are slower with Flash disks compared to Reads because Flash …Mysql server for a client, upgrading their main database (from 16GB, 2 two