… With this method, every event is still written to the binary log on the master, but the slave determines … bet that MySQL is up and running. That said, there are plenty of other MySQL and OS-level status …grant-tables and insert a few rows into an InnoDB table, but trying to run a simple mysqlslap …
Post: Measuring the amount of writes in InnoDB redo logs
October 8, 2012 By 4 Comments
… is that while Innodb_os_log_written is incremented when the log file is written, the LSN is incremented when the log buffer is written. This is interesting… Innodb_os_log_written by 1024 (a 3x difference!). This means that the documentation is correct: Innodb_os_log_written is the number of bytes written to the redo logs…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…MySQL manual, especially the …innodb_open_filesblogpercona.commanual Innodb_os_log_fsyncsblogpercona.commanual Innodb_os_log_pending_fsyncsblogpercona.commanual Innodb_os_log_pending_writesblogpercona.commanual Innodb_os_log_writtenblogpercona.commanual Innodb_page_sizeblogpercona.commanual Innodb…
Post: How to calculate a good InnoDB log file size
November 21, 2008 By 38 Comments
… time: mysql> pager grep sequence PAGER set to ‘grep sequence’ mysql> show engine innodb status\G select sleep(60); show engine innodb status\G Log sequence number… all versions of MySQL. In 5.0 and newer, you can just watch Innodb_os_log_written from SHOW GLOBAL STATUS, too.) mysql> select (3838334638 – 3836410803…
Post: Modeling MySQL Capacity by Measuring Resource Consumptions
March 8, 2011 By 1 Comment
… our estimates. If we’re running Innodb with MySQL we can use Innodb_data_reads , Innodb_data_writes, Innodb_os_log_fsyncs for your disk IO estimation…_TIME: 49 BYTES_RECEIVED: 21847267 BYTES_SENT: 336986112 BINLOG_BYTES_WRITTEN: 0 ROWS_FETCHED: 485139 ROWS_UPDATED: 0 TABLE_ROWS_READ…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
… process no 3396, OS thread id 1148250464, thread declared inside InnoDB 442 mysql tables in use 1, locked 0 MySQL thread id 8079, query…/second Log section provides information about log subsystem of Innodb. You can see current log sequence number – which is amount of bytes Innodb has written in log…
Post: Analyzing the distribution of InnoDB log file writes
July 16, 2010 By 5 Comments
… analysis of the distribution of writes to InnoDB‘s log files. On a high-traffic commodity MySQL server running Percona XtraDB for a…/lib/mysql/ib_logfile1 The file descriptors are 8 and 9. We’ll need to capture writes to both of those; InnoDB… then written again, instead of just written. Vadim did some benchmarks earlier showing that the log files need to be in the OS cache…
Post: Helgrinding MySQL with InnoDB for Synchronisation Errors, Fun and Profit
November 24, 2011 By 2 Comments
…MySQL server. Let’s take a recent 5.1 bzr version (pre-5.1.61) and a single test, innodb_plugin.innodb… pool statistics counters: number of read, written, evicted, etc. pages. The more …os_file_write (os0file.c:2172) ==9090== by 0x6B35B5E: fil_io (fil0fil.c:4432) ==9090== by 0x6B67EDA: log…
Post: Aligning IO on a hard disk RAID – the Benchmarks
June 9, 2011 By 13 Comments
…Architecture | CPU = 64-bit, OS = 64-bit # Processor ################################################## Processors | physical =…mysql socket=/var/run/mysqld/mysqld.sock innodb_file_per_table = true innodb_data_file_path = ibdata1:10M:autoextend innodb_flush_log…– files that were written before this …
Post: Innodb Performance Optimization Basics
November 1, 2007 By 75 Comments
… OS so it would not swap out MySQL out of memory. MySQL Innodb Settings The most important ones are: innodb…, check out detailed guide on tuning innodb buffer pool innodb_log_file_size – This depends on your … with no OS changes and have no changes done to application which was written keeping MyISAM …
