June 19, 2013

Comment: Database problems in MySQL/PHP Applications

… seen a situation where mysql reports max connections reached and freezes, with a bunch of processes waiting to finish. Also, mysql will not shut…/mysql.sock bind-address=10.234.94.71 skip-locking key_buffer_size = 2000M max_allowed_packet = 32M # table_cache=20M # open-files-limit=20000…

Comment: table_cache negative scalability

… Error in accept: Too many open files 100414 0:21:52 [ERROR] /usr/local/mysql/bin/mysqld: Can’t open file: ‘./wc_miehr_posasmp/panel…_size = 100 max_connections = 400 table_cache = 20000 open_files_limit = 40000 max_binlog_size = 500M max_allowed_packet = 20M tmp_table_size = 100M max_heap_table_size…

Comment: table_cache negative scalability

… Error in accept: Too many open files 100414 0:21:52 [ERROR] /usr/local/mysql/bin/mysqld: Can’t open file: ‘./wc_miehr_posasmp/panel…_size = 100 max_connections = 400 table_cache = 20000 open_files_limit = 40000 max_binlog_size = 500M max_allowed_packet = 20M tmp_table_size = 100M max_heap_table_size…

Post: How Percona does a MySQL Performance Audit

mysql –user=mysql –pid-file=/var/run/mysqld/mysqld.pid –skip-external-locking –port=3306 –socket=/var/db/mysql/mysqlconnectsMySQL server’s limitationopenings in chess — the great chess players study openings

Post: Announcing Percona Server for MySQL version 5.5.29-30.0

connections. New user statements have been introduced for handling the XtraDB changed page tracking log files… XtraDB used to print the open read view list without … option innodb_changed_pages_limit. MySQL option handling would then… innodb_changed_pages_limit option to innodb_max_changed_pages. Bug …

Post: SHOW INNODB STATUS walk through

… and innodb_max_purge_lag will become…connections for MySQL there will be ether not started state if there is no active Innodb transaction for this connection… Innodb tries to limit thread concurrency … showing details of file IO: ——– FILE I/O ——–… 1 read views open inside InnoDB Main thread…

Comment: Solving RPM installation conflicts in CentOS 5 and CentOS 6

mysql//galera.cache; gcache.page_size = 128M; gcache.size = 128M; gcs.fc_debug = 0; gcs.fc_factor = 1; gcs.fc_limit…131072 max_used_connections=0 max_threads=151 thread_count=0 connectionopen+0×88)[0xefa248] /usr/lib/libgalera_smm.so(gcs_open+0x2c8… mysqld from pid file /var/lib/mysql/mysql1.pid ended…

Post: Air traffic queries in InfiniDB: early alpha

…issuing LOAD DATA on 180MB file ( for 1989 year, 1st month…_length: 0 Data_length: 0 Max_data_length: 0 Index_length:…Month); ERROR 122 (HY000): Cannot open table handle for ontime. …c DESC LIMIT 10; 4.96 sec Query Q4: mysql> SELECT Carrier,… restarted mysqld but could not connect to mysqld anymore. In …