…queries, ie queries with IN is so painful with prepared statements – I would like to be able to simply able to pass data array and let library to take care about emulating. Cached Prepared Statements…
Post: New SpecJAppServer results at MySQL and Sun.
November 12, 2008 By Leave a Comment
…Prepared statements generally should have helped this benchmark because it has a lot of same queries an Prepared Statements…cache = 16 query_cache_size = 0M thread_concurrency = 8 max_heap_table_size=200M log-output = FILE log-slow-queries=/tmp/mysql-slow.log long_query…
Post: Top 5 Wishes for MySQL
June 29, 2007 By 10 Comments
…’m saying about Prepared Statements in MySQL 4.1 which came without query cache support but even worse not all of statements could be prepared not to… for very long time. For example Query Cache support for Prepared Statements is only fixed in MySQL 5.1 and Most of other items are still…
Post: MySQL Server Memory Usage
May 17, 2006 By 21 Comments
…, query_cache_size. If you’re using MyISAM seriously you can also add the size of Operation System cache you would like MySQL to… prepared statements and cursors. Their number finally can be limited but each of them still can have very large memory consumption Innodb Table Cache…
Comment: Handling big result sets
June 27, 2006 By 13 Comments
…mysql_query: Number of rows: 1000000. execution time: 24.53382897377 s mysql_unbuffered_query: (same code, only changing mysql_query to mysql_unbuffered_query…: Using the new mysqli and prepared statement based on the code you…2.0 s. Does mysql cache these prepared statements perhaps? Either way the…
Post: How Percona does a MySQL Performance Audit
November 24, 2008 By 17 Comments
…and write something instructional to the client about it. Preparing…queries, in total execution time. By the way, the slow query logs in the stock MySQL server are extremely limited, and…statements and analyze them individually. The goal is always to develop X-Ray Vision and…
Post: Wanted: Better memory profiling for MySQL
May 18, 2008 By 4 Comments
… would log in to customers system and find MySQL using too much memory. I would look …by other global buffers such as query_cache_size and key_buffer and will in many cases see some …associated with opened tables, prepared statements etc ? Could it be some of the queries currently running is using …
Post: High Rate insertion with MySQL and Innodb
January 7, 2011 By 17 Comments
…and the system was built using multiple tables. Using multiple key caches was the good solution at that time and… good suggestions on tuning MySQL 5.5 and this is what I…impact performance of your select queries dramatically. The inserts in … way is to have prepared bulk insert statements). We need to …
Comment: MySQL Prepared Statements
September 3, 2008 By 21 Comments
… prepare/execute pair. The table had a million rows and each row was updated. The statement-at-a-time file looked like: reset query cache… using @id . I had thought the prepare/execute file would run faster, since supposedly mysql had already done a hard parse on… for the difference. There was no query cache defined and I used different operators for the 2 statements so no command was the same…
Post: Announcing Percona Server 5.1.66-14.2
January 15, 2013 By Leave a Comment
…and from the Percona Software Repositories). Based on MySQL…PREPARE and COMMIT stages, the prepared InnoDB transaction would not have the slave position recorded and…statements in stored procedures correctly, this caused Query_time to increase for every query stored procedure logged to the slow query…
