… the Slave to make another one you need to use SHOW SLAVE STATUS which provides much more information. mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State…_Pos: 744615788 Relay_Master_Log_File: db01-bin.003814 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB…
Post: Reasons for MySQL Replication Lag
July 29, 2011 By 6 Comments
… some change, though often subtle as computers are state machines and with no external and internal changes… be able to see it by comparing IO MySQL is doing to IO going to devices from OS standpoint…. be the difference between slave never lags and slave never is able to catch up. MySQL or OS version …
Comment: Percona Replication Manager, a solution for MySQL high availability with replication using Pacemaker
February 7, 2012 By 94 Comments
… Master/Slave Set: ms_MySQL [p_mysql] Masters: [ ubuntu-cluster01 ] Slaves: [ ubuntu-cluster02 ] Still, the replication never starts! The crm shows: property $id=”mysql_replication…” in my config, still “show slave status” gives the following output: mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Master_Host: ubuntu-cluster01 Master_User…
Comment: MySQL Replication vs DRBD Battles
May 1, 2008 By 12 Comments
…). When the max is exceeded the server can favor background IO over transactions to let the server catch up. Another option… an HA solution with MySQL. It also includes a feature to keep the InnoDB transaction log and slave replication state in sync after… — the IO thread would copy events into the relay log and the mirrored binlog. It allows hierarchical replication and transparent slave failover…
Post: The new cool MySQL patch has landed! Check your queries performance!
October 31, 2007 By 16 Comments
… LOGGING OF THE REPLICATED STATEMENTS Normally MySQL will not write into slow …with the new parameter –log-slow-slave-statements. THE DETAILED INFORMATION ABOUT …such case Disk_tmp_table will state that. Filesort is for indicating …good way to measure that. InnoDB_IO_r_bytes is the corresponding value…
Post: State of MySQL Market and will Replication live ?
April 9, 2008 By 29 Comments
… see as response to these requirements ? From MySQL side we have further development of MySQL Cluster to be more usable for web… as development of MySQL Proxy to help with sharding or dealing with use not fully up to date slaves. Some innovation is… which can be used with MySQL to get very fast IO and so consolidate system suffering from IO bound workloads. There is KickFire…
Comment: MySQL Server Memory Usage
September 1, 2006 By 18 Comments
…. We have a montoring tool that states that we often hit the “max_connections” …’ ‘Select_scan’, ’1104831′ ‘Slave_open_temp_tables’, ’0′ ‘Slave_retried_transactions’, ’0′ ‘Slave_running’, ‘OFF’ ‘Slow_launch_threads’,… 32M according to MySQL innodb_additional_mem_pool_size=20M innodb_file_io_threads=4 …
Post: Why you don't want to shard.
August 6, 2009 By 33 Comments
… architectures to be prematurely complicated. So let me state it: You don’t want to shard. Optimize … database. Too many writes – Either the IO system, or a slave can’t keep up with the amount … busy tables, and move them onto their own MySQL server. Partition-by-function keeps the architecture …
Comment: Implementing Parallel Replication in MySQL
November 16, 2010 By 3 Comments
…development. A fundamental limitation of the MySQL binary log is that it …mix of states in the “full independence” approach. We need replication state to become _…slave, more binlog stream will become pending from the IO thread, increasing the opportunities for parallelisation and helping the slave…
Post: Innodb Double Write
August 4, 2006 By 23 Comments
…other parts remain in their former state. Most typically partial page writes …on the stripe border requiring multiple IO requests. Same happens with Hardware … much does double write buffer affect MySQL Performance ? Even though double write …do not care about your data (ie slaves on RAID0) or if your …
