Post: New SpecJAppServer results at MySQL and Sun.
…mysql/var innodb_data_file_path = ibdata1:10000M:autoextend innodb_file_per_table innodb_log_group_home_dir = /log/mysql/var/ innodb_checksums = 0 innodb_doublewrite = 0 innodb_buffer_pool_size =...
View ArticlePost: MySQL 5.5.8 and Percona Server: being adaptive
…mysql/mysql.sock [mysqld] core basedir=/usr/local/mysql user=root socket=/var/lib/mysql/mysql.sock skip-grant-tables…innodb_file_per_table=1 innodb_flush_log_at_trx_commit=2 innodb_log_buffer_size=8M...
View ArticlePost: Tuning InnoDB Concurrency Tickets
… per row examined + 1 ticket per row deleted ALTER: (2 * rows in the table) – 1 As with any performance optimization …mysql-user=root –mysql-socket=/var/lib/mysql/mysql.sock run Applicable my.cnf...
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Post: Review of MySQL 5.6 Defaults Changes
… just default at 2000 ? innodb_file_per_table =1 Great! We found it is better choice in 95%+ of installations innodb_log_file_size = 48M This is still too small for any real load but a lot better than...
View ArticlePost: Ultimate MySQL variable and status reference list
…innodb_doublewriteblogpercona.commanual innodb_fast_shutdownblogpercona.commanual innodb_file_formatblogpercona.commanual innodb_file_format_checkblogpercona.commanual...
View ArticlePost: MySQL 5.5 and MySQL 5.6 default variable values differences
... | | INNODB_PURGE_BATCH_SIZE | 20 | 300 | | PERFORMANCE_SCHEMA_MAX_THREAD_INSTANCES | 1000 | 224 | | SOCKET | /tmp/mysql_sandbox5530.sock | /tmp/mysql_sandbox5610.sock | | INNODB_FILE_PER_TABLE |...
View ArticlePost: Percona XtraBackup 2.0.7 for MySQL available for download
…files). Percona XtraBackup has implemented support for the InnoDB Buffer Pool Preloading introduced in MySQL 5.6. Starting with MySQL…tables and slow IO then XtraBackup can spend a lot of time opening...
View ArticlePost: Virident vCache vs. FlashCache: Part 2
…MySQL configuration (configuration A) appears below: #####fixed innodb options innodb_file_format = barracuda innodb_buffer_pool_size = 4G innodb_file_per_table = true innodb_data_file_path =...
View ArticlePost: MySQL and the SSB - Part 2 - MyISAM vs InnoDB low concurrency
… schema presents some unique challenge to the database optimizer. The SSB benchmark consists of four sets of …mysql socket=/var/lib/mysql/mysql.sock user=justin innodb_buffer_pool_size=64G...
View ArticlePost: More on MySQL transaction descriptors optimization
…confusion. Even though the read-only transactions optimization in MySQL 5.6 virtually eliminates contention on the …innodb_flush_method = O_DIRECT innodb_log_buffer_size = 16M innodb_buffer_pool_size...
View ArticlePost: InnoDB Full-text Search in MySQL 5.6: Part 3, Performance
…tables and adding “FULLTEXT KEY (title, body)” to the SEO tables. We’ll then drop these tables, drop our file cache, restart MySQL… InnoDB table, the table itself … Opening tables | 0.000017 | | init...
View ArticlePost: New SpecJAppServer results at MySQL and Sun.
…mysql/var innodb_data_file_path = ibdata1:10000M:autoextend innodb_file_per_table innodb_log_group_home_dir = /log/mysql/var/ innodb_checksums = 0 innodb_doublewrite = 0 innodb_buffer_pool_size =...
View ArticlePredicting how long data load would take
I had this question asked many times during last week, and there is really no easy answer. There are just way too many variables to consider especially while loading large schemas with a lot of...
View ArticleLearning about MySQL Table Fragmentation
Recently I was working with the customer who need quick warmup – to get Innodb table fetched in memory as fast as possible to get good in memory access performance.To do it I run the query: “SELECT...
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MySQL 5.5.8 – in search of stability
A couple of days ago, Dimitri published a blog post, Analyzing Percona’s TPCC-like Workload on MySQL 5.5, which was a response to my post, MySQL 5.5.8 and Percona Server: being adaptive. I will refer...
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A case for MariaDB’s Hash Joins
MariaDB 5.3/5.5 has introduced a new join type “Hash Joins” which is an implementation of a Classic Block-based Hash Join Algorithm. In this post we will see what the Hash Join is, how it works and for...
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InnoDB performance optimization basics (redux)
I recently stumbled upon a post that Peter Zaitsev published back in 2007 titled “Innodb Performance Optimization Basics.” It’s a great post and reading it inspired me to examine what’s changed in the...
View ArticleHow to reclaim space in InnoDB when innodb_file_per_table is ON
When innodb_file_per_table is OFF and all data is going to be stored in ibdata files. If you drop some tables of delete some data then there is no any other way to reclaim that unused disk space except...
View ArticleMySQL 5.5 and MySQL 5.6 default variable values differences
As the part of analyzing surprising MySQL 5.5 vs MySQL 5.6 performance results I’ve been looking at changes to default variable values. To do that I’ve loaded the values from MySQL 5.5.30 and MySQL...
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Virident vCache vs. FlashCache: Part 2
This is the second part in a two-part series comparing Virident’s vCache to FlashCache. The first part was focused on usability and feature comparison; in this post, we’ll look at some sysbench test...
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