Post: TPC-H Run on MySQL 5.1 and 6.0
… is MySQL 6.0 time divided by MySQL 5.1 time so if it is less than 1 MySQL 6.0 is faster if more than 1 slower: Query MySQL 5.0.23 MySQL 6.0.4Ratio… of magnitude better compared to MySQL results on...
View ArticlePost: Sphinx search performance optimization: attribute-based filters
... Speaking in MySQL terms,...5 | | total_found | 5 | | time | 0.096 | | keyword[0] | great | | docs[0] | 200084 | | hits[0] | 216948 | +---------------+--------+ 6 rows in set (0...different queries...
View ArticlePost: Fun with the MySQL pager command
…different execution plans for a query by changing indexes. Discarding the result is possible with pager: mysql…mysql> SELECT … 32a1894d773c9b85172969c659175d2d – 1 row in set (0.40 sec) # Rewritten...
View ArticlePost: Common MySQL traps webinar questions followup
… full slow query logging (with long_query_time = 0) for some time during peak load. Then you … different as both CHAR(1) and ENUM will need 1 byte per value (again as long as you use a 1…5.5, and most...
View ArticlePost: Is there room for more MySQL IO Optimization?
…: utf8_general_ci Checksum: NULL Create_options: Comment: 1 row in set (0.02 sec) The table is approximately 30GB in size… with different read_ahead configuration. Percona Server still allows me to...
View ArticlePost: Implications of Metadata Locking Changes in MySQL 5.5
… mostly been around the new changes in MySQL 5.6 (and that is understandable), I have had…of versions prior to 5.5 also means that queries could be written in different order to the …0.00 sec)...
View ArticlePost: Solving RPM installation conflicts
… reports of the RPM packages for CentOS 5 (mostly) and CentOS 6 having issues when installing different combinations of our products, particularly with… php-mysql alongside PS 5.5 in CentOS 6: # yum...
View ArticlePost: Is MySQL 5.6 slower than MySQL 5.5?
…=1 –oltp-read-only=on –init-rng=on –max-requests=0 –max-time=300 run For single thread MySQL 5.5 is 11% faster than MySQL 5.6… threads MySQL 5.5 is 26% faster compared to MySQL 5.6 and if you disable...
View ArticlePost: MySQL 5.5 and 5.6 default variable values differences
…’ve loaded the values from MySQL 5.5.30 and 5.6.10 to the different tables and ran the query: mysql [localhost] {msandbox} (test) > select var55… different variables which would make more sense in...
View ArticlePost: InnoDB Full-text Search in MySQL 5.6 (part 1)
…the community editions of MySQL 5.5.30 and MySQL 5.6.10 with no tuning… in 5.5.30 where, of course, the only difference is …Query OK, 0 rows affected, 1 warning (39.73 sec) Records: 0 Duplicates: 0...
View ArticlePost: InnoDB Full-text Search in MySQL 5.6: Part 2, The Queries!
…MySQL 5.6: Part 2, The Queries![/caption] This is part 2 in a 3 part series. In part 1…scores* are different, but the *matches* are COMPLETELY DIFFERENT between 5.5/MyISAM and 5.6/InnoDB. …0 Warnings:...
View ArticlePost: MySQL performance: Impact of memory allocators (Part 2)
…different angle: What impact does the number of processor cores have on different memory allocators and what difference we will see in MySQL…MySQL. # Test: POINT_SELECT:throughput, QPS # # Set 1 –...
View ArticlePost: MySQL 5.6 vs MySQL 5.5 and the Star Schema Benchmark
…1: Default config for MySQL 5.5 and MySQL 5.6, no tuning at all Config 2: MySQL 5.6 with all default settings except innodb_old_blocks_time=0 …test significantly slower than MySQL 5.5.30 in repeat...
View ArticlePost: MySQL Backup tools used by Percona Remote DBA for MySQL
… 2.0.5+, the time taken for “FLUSH TABLES WITH RAED LOCK” is normally under 1 second. Tips… automatically replicating out to all slaves mysqlbinlog 5.6 Last year Percona IT director Tamas Kozak …...
View ArticlePost: MySQL 5.6.10 Optimizer Limitations: Index Condition Pushdown
… condition 1 row in set (0.00 sec) With ICP, the actual number of rows read at SQL layer is actually very different… MySQL 5.5. For example, in this case, the actual number of “Handler_read_next”...
View ArticlePost: MySQL 5.6 Compatible Percona Toolkit 2.2 Released
… for MySQL 5.6 and Percona XtraDB Cluster We started beta support for MySQL 5.6 in 2.1.8 when 5.6 was still beta. Now that MySQL 5.6 is… updated since. Now that we have four base versions of MySQL...
View ArticlePost: MySQL 5.6 - InnoDB Memcached Plugin as a caching layer
…. Enter MySQL 5.6 with the memcached plugin… As part of the standard MySQL 5.6 … / 100000; $timer->start(); for ($i = 0; $i 0; $i differences: InnoDB store operation was 280% higher (~1.73 ms/op)...
View ArticlePost: InnoDB Full-text Search in MySQL 5.6 (part 1)
…InnoDB full-text search in MySQL 5.6 (part 1) in MySQL 5.6 is syntactically identical to MyISAM …tables created in 5.5.30 where, of course, the only difference is that the… 13.13 sec) Records: 245051...
View ArticlePost: Understanding the maximum number of columns in a MySQL table
… generating reports. This evolved into the SQL based MySQL, with MySQL 1.0 being released in 1995. The FoRM file … on each field you reduce the number of different ENUM elements you can have, you are...
View ArticlePost: 10 years of MySQL User Conferences
… “MySQL Enterprise,” and MySQL 5.0 is finally available as GA with version 5.0.20a… MySQL 5.1 is in development (5.1…MySQL 6.0 was to ship the next year. MySQL releases are split between the MySQL...
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