… is a lot of errors like: DBD::mysql::st execute failed: called with 2 bind variables when 6 are needed [for Statement “…” with…) DBD::mysql to any version except 4.014. To see which version of DBD::mysql a system has, execute: perl -MDBD::mysql -e ‘print $DBD::mysql::VERSION, “\n”;’ This bug may…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…MySQL manual, especially the option and variable reference table. But just as frequently, I want to look up blog posts on variables…back_logblogpercona.commanual basedirblogpercona.commanual big_tablesblogpercona.commanual bind_addressblogpercona.commanual Binlog_cache_disk_useblogpercona.commanual …
Post: Percona XtraDB Cluster reference architecture with HaProxy
June 20, 2012 By 63 Comments
… have a 3 node cluster. mysql> show global status like ‘wsrep_cluster_size’; +——————–+——-+ | Variable_name | Value | +——————–+——-+ | wsrep_cluster_size … 5000 clitimeout 50000 srvtimeout 50000 frontend pxc-front bind *:3307 mode tcp default_backend pxc-back frontend …
Post: MySQL Prepared Statements
August 2, 2006 By 21 Comments
… you care about archiving best performance in your application using MySQL you should learn about prepared statements. These do not neccesary… malformed data so query changes it meaning. You also can bind direct variables to return columns – which means not only data does… statements diretly. You can also adjust max_prepared_stmt_count variable which limits how many statements can be open at the…
Post: kernel_mutex problem. Or double throughput with single variable
December 2, 2011 By 17 Comments
…) has complex handling with spin loops, and there are two variables that affects mutex loops: innodb_sync_spin_loops and innodb…_wait_delay. I actually think that tuning system with these variable is something closer to dance with drum than to scientific…_thread_concurrency and also bind mysqld to less CPUs, and also it is interesting to see if MySQL 5.6.3 really…
Post: SQL Injection Questions Followup
July 26, 2012 By 2 Comments
… separates the prepare step from the parameter binding step as I showed in my presentation. …Jonathan C. also commented: Q: My preferred variable parameter format: bug_id IN (?” . str_repeat(‘, ?’, count($…computation load onto their database server. Their MySQL server became CPU-bound, while their …
Comment: Should we give a MySQL Query Cache a second chance ?
April 10, 2011 By 64 Comments
… the query cache was designed before InnoDB or perhaps because MySQL supports multiple storage engines, but to my thinking you’re…” brings up the question of bind variables as well. As I recall there is some limitations in MySQL around cursors, and that the… that actually the execute and fetch phases happen together in MySQL. I guess that also explains how the limit clause helps…
Comment: Database problems in MySQL/PHP Applications
November 6, 2006 By 13 Comments
…= /tmp/mysql.sock #tmpdir =/mysql_tmp/ # Here follows entries for some specific programs # The MySQL server [mysqld] port = 3306 socket = /tmp/mysql.sock bind-… # MASTER_USER=’joe’, MASTER_PASSWORD=’secret’; # # OR # # 2) Set the variables below. However, in case you choose this method, then # …
