…time=7200 –max-requests=0 –percentile=95 \ –mysql-user=root –mysql-socket=/tmp/mysql.sock –mysql-table-engine=innodb \ –oltp-read-only=off … back_log = 50 wait_timeout = 120 max_connections = 5000 max_prepared_stmt_count=500000 max_connect_errors = 10 table_open_cache = 10240 …
Post: Benchmarking Percona Server TokuDB vs InnoDB
May 7, 2013 By 32 Comments
…=insert_roll.lua –oltp-table-size=10000 –mysql-user=root –oltp-tables-count=32 –mysql_table_engine=tokudb –oltp_auto_inc=on –max… (fixed) port = 3306 back_log = 50 max_connections = 2000 max_prepared_stmt_count=500000 max_connect_errors = 10 table_open_cache = 2048 max… = 10G myisam_repair_threads = 1 myisam_recover socket=/var/lib/mysql/mysql.sock user=root skip-grant-tables TokuDB-related options are…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…constantly referring to the amazing MySQL manual, especially the option and variable reference table. … port_open_timeoutblogpercona.commanual preload_buffer_sizeblogpercona.commanual Prepared_stmt_countblogpercona.commanual print_defaultsblogpercona.commanual profilingblogpercona.commanual profiling…
Post: Troubleshooting MySQL Memory Usage
March 21, 2012 By 5 Comments
…. For prepared statements you might want to look at Prepared_stmt_count to see how many prepared statements are allocated on server and Com_stmt_send… and fixed. This is where your MySQL Support contract can be handy. Conclusion Understanding where MySQL can allocate memory can help us…
Post: MySQL Prepared Statements
August 2, 2006 By 21 Comments
… in MySQL Server turned out to be prepare statements or cursors which were forgotten to be closed. Watch Com_stmt_prepare and Com_stmt_close to see if you’re closing all prepared statements. In newer versions you can also use prepared_stmt_count variable…
Post: 10+ Ways to Crash or Overload MySQL
November 13, 2007 By 20 Comments
… prepared statements and keep max_prepared_stmt_count very low. Prepared Statements and Blob Data If you’re want to get memory consumed by single prepared…_size or max_prepared_stmt_count are designed to protect from typical application mistakes not from someone intentionally trying to bring MySQL Server down…
Post: MySQL 5.6.7-RC in tpcc-mysql benchmark
October 8, 2012 By 22 Comments
… two bugs: MySQL 5.6.7 locks itself on CREATE INDEX MySQL 5.6.7-rc crashed under tpcc-mysql workload But at… change the result significantly, especially in intensive IO workloads. In MySQL 5.6 it is finally possible to achieve stable throughput… (fixed) port = 3306 back_log = 50 max_connections = 2000 max_prepared_stmt_count=500000 max_connect_errors = 10 table_open_cache = 2048 max…
Post: XtraDB/InnoDB CPU bound benchmarks on 24cores server
December 29, 2008 By 6 Comments
… : 40 bits physical, 48 bits virtual power management: I tested MySQL-5.1.30 with InnoDB plugin, Xtradb-1.0.2…=1M max_connections=3000 max_heap_table_size=64M max_prepared_stmt_count=1000000 query_cache_size=0 skip_grant_tables skip_locking…
Post: SQL Injection Questions Followup
July 26, 2012 By 2 Comments
…= join(“,”, array_fill(0, count($params), “?”)); $sql = “SELECT * FROM Bugs WHERE bug_id IN ($placeholders)”; $stmt = $pdo->prepare($sql); $stmt->execute($params); Radu … too much computation load onto their database server. Their MySQL server became CPU-bound, while their multiple PHP application …
Comment: 10+ Ways to Crash or Overload MySQL
December 9, 2009 By 20 Comments
…prepared statement like Insert into test(long_text) values (?); while (chunck_cnt<535000) { mysql_stmt_send_long_data(mysql, 0, chunk, 2000); chunk_cnt++; } mysql_stmt…
