…place, we can begin. Open command line (shell) …mysql-5.0.51a) % patch -p1 < ../patch-mysql-5.0.51a-msl.diff patching file include/my_time.h patching file scripts/mysqldumpslow.sh patching file… –param=ssp-buffer-size=4 -m64 -mtune=generic’ ‘CXX=…log_slow_rate_limit=# Rate limit statement writes to …
Post: Evaluating IO subsystem performance for MySQL Needs
March 5, 2008 By 23 Comments
… important for MySQL. To prepare small 128MB single file working…4.8: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 1 Extra file open flags: 16384 1 files…Time limit exceeded, exiting… Done. Operations performed: 773835 Read, 0 Write, 0 Other …
Post: Air traffic queries in InfiniDB: early alpha
November 2, 2009 By 19 Comments
… after issuing LOAD DATA on 180MB file ( for 1989 year, 1st month) very… Year, Month); ERROR 122 (HY000): Cannot open table handle for ontime. As warning… ORDER BY c DESC LIMIT 10; 4.96 sec Query Q4: mysql> SELECT Carrier, count(*)….1.39-community InfiniDB Community Edition 0.9.4.0-5-alpha (GPL), so I…
Post: Percona XtraDB Cluster: Failure Scenarios with only 2 nodes
July 25, 2012 By 6 Comments
…data loss. Remove ‘/var/lib/mysql//grastate.dat’ file and restart if you wish …total), act_id = 16, last_appl. = 0, protocols = 0/4/2 (gcs/repl/appl), group UUID…: options: gcs.fc_limit=9999999; gcs.fc_factor=1.0; gcs.fc_master_slave…CLOSED -> OPEN (TO: 0) 2012-07-24 11:42:51.271 INFO: Opened channel ‘…
Post: Shard-Query turbo charges Infobright community edition (ICE)
May 6, 2011 By 23 Comments
…open source tool kit which helps improve the performance of queries against a MySQL…MySQL command line client was used to execute the a script file…servers). Due to ICE limitations, the data was … date range: — Q8.0 SELECT dest.CityName, COUNT…, Carrier,dest.CityName ORDER BY 4 DESC; Conclusion The…
Post: Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
…0.xx, where xx >= 30 should be better than 4.1.xx. PZ: I should note MySQL 5.0 vs 4…log* files; I know that innodb writes files in the log file …size Q36: There have been several MySQL bugs opened about multi-core scalability (…to quantify what are the limits of different operations for different…
Post: What is the longest part of Innodb Recovery Process ?
December 20, 2007 By 1 Comment
…MySQL 4.1 and above the longest … would not keep server completely unusable (some limitations still apply though). In the case I… server had about 65000 tables using innodb_file_per_table so “InnoDB: Reading tablespace information … one table can be opened at the time as of MySQL 5.0 It would be great…
Post: XtraDB: The Top 10 enhancements
August 13, 2009 By 5 Comments
… part 2 of 4 on building our training workshop. Last … the built-in InnoDB included in MySQL 5.0 and 5.1. Building … to using very small transaction log files (innodb_log_file_size), which is worse for performance… built-in InnoDB, the number of open transactions is limited to 1023 (see bug report). …
Post: Innodb Performance Optimization Basics
November 1, 2007 By 75 Comments
…Openings I like to ask them a basic… innodb buffer pool innodb_log_file_size – This depends on your … current Innodb Scalability Fixes having limited concurrency helps. The actual number …. This option was added in MySQL 4.1 and now stable enough to…locking in 5.0 and even more to come with MySQL 5.1 …
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
…0 MySQL thread id 8079, query id 728899 localhost root Sending data select sql_calc_found_rows * from b limit… see 4 helper threads, on Windows it however can be adjusted by innodb_file_… ROW OPERATIONS ————– 0 queries inside InnoDB, 0 queries in queue 1 read views open inside InnoDB…
