…_examined: 655360 use test; SET timestamp=1325145746; select count(*) from auto_inc; Compare that to Percona Server with log_slow_verbosity=full….001414 # InnoDB_rec_lock_wait: 0.000000 InnoDB_queue_wait: 0.000000 # InnoDB_pages_distinct: 973 SET timestamp=1325146286; select count(*) from auto_inc; Note…
Post: Identifying the load with the help of pt-query-digest and Percona Server
December 29, 2011 By 3 Comments
Post: Investigating MySQL Replication Latency in Percona XtraDB Cluster
March 3, 2013 By 13 Comments
… –num-threads=32 –init-rng=on –max-requests=0 –oltp-auto-inc=off –max-time=3000 run Results become as follows: Summary… as follows: root@dpe01:/etc/mysql# sysbench –test=oltp –oltp-auto-inc=off –oltp-test-mode=nontrx –oltp-nontrx-mode=update_key…_name=DPE binlog_format=ROW default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 innodb_locks_unsafe_for_binlog=1 wsrep_sst_auth…
Post: Edge-case behavior of INSERT...ODKU
October 27, 2012 By 6 Comments
… NULL DEFAULT NULL, PRIMARY KEY(id), UNIQUE KEY(username) ) ENGINE=InnoDB; Now consider the following sequence of events. (root@localhost) [test… a new row, our auto-increment counter has increased to 3. This is actually expected behavior; InnoDB checks constraints in the order… first. So, MySQL checks our INSERT, sees that the next auto-inc value is available, and claims it, but then it checks…
Comment: Avoiding auto-increment holes on InnoDB with INSERT IGNORE
June 19, 2012 By 8 Comments
… you wanted the Insert to happen but with the next auto-inc number. I have a situation where I have a multi… the only way to fix this is to change the innodb_autoinc_lock_mode=0? Or is there another way. I… because I want the row inserted, just with a different auto-inc value that isn’t a duplicate.
Comment: InnoDB auto-inc scalability fixed
September 26, 2007 By 18 Comments
… it. The *thing* is that auto-inc table locking issue makes InnoDB inefficient for OLTP environments where an AUTO-INC column is being used. Frank
Comment: Percona XtraDB Cluster reference architecture with HaProxy
February 14, 2013 By 63 Comments
…in 75 pct cases) Using “BEGIN” for starting transactions Using auto_inc on the id column Maximum number of requests for …–iterations=50 –concurrency=5 –engine=innodb –auto-generate-sqlBuilding Create Statements for Auto Building Query Statements for Auto Parsing engines to use. Starting …
Post: Recovery deleted ibdata1
August 10, 2012 By 9 Comments
…, so it will create empty ones. The InnoDB dictionary will be empty and InnoDB won’t be able to use a bunch… in 75 pct cases) Using “BEGIN” for starting transactions Using auto_inc on the id column Threads started! Screen1: root@localhost:/var…/mysql# /etc/init.d/mysql restart After the restart all InnoDB tables are reachable: mysql> select count(*) from sbtest; +———-+ | count(*) | +———-+ | 1000000…
Comment: InnoDB auto-inc scalability fixed
September 26, 2007 By 18 Comments
[...] MySQL InnoDB çš„ auto-increment æœƒé€ æˆ INSERT 時使用 table-level lock çš„ bug çµ‚æ–¼ä¿®æ£ (從 2006 年一月就進 MySQL å›žå ±ç³»çµ±çš„ bug)，下個 5.1 的版本 (é 定是 5.1.22) 就會包括在裡é¢ï¼šInnoDB auto-inc scalability fixed。 [...]
Comment: MySQL Performance on Memory Appliance
February 11, 2009 By 23 Comments
… RPM HDs RAID 10 sysbench –test=oltp –mysql-table-engine=innodb –oltp-table-size=1000000 –mysql-socket=/tmp/mysql.sock –mysql…-threads=16 –max-requests=100000 –test=oltp –mysql-table-engine=innodb –oltp-table-size=1000000 –mysql-socket=/tmp/mysql.sock –mysql… in 75 pct cases) Using “BEGIN” for starting transactions Using auto_inc on the id column Maximum number of requests for OLTP…
Comment: MySQL Performance on Memory Appliance
February 11, 2009 By 23 Comments
… –oltp-table-size=1000000 –db-driver=mysql –mysql-table-engine=innodb –mysql-socket=/var/lib/mysql/mysql.sock –mysql-user=root…-threads=16 –max-requests=100000 –test=oltp –mysql-table-engine=innodb –db-driver=mysql –mysql-socket=/var/lib/mysql/mysql.sock… in 75 pct cases) Using “BEGIN” for starting transactions Using auto_inc on the id column Maximum number of requests for OLTP…
