June 19, 2013

Post: Percona XtraDB Cluster reference architecture with HaProxy

… 13:21:19 [Note] – ‘(null)’ resolves to ‘::’; 120619 13:21:19 [Note] Server socket created on IP: ’0.0.0.0′. 120619…=oltp –db-driver=mysqlmysql-engine-trx=yes –mysql-table-engine=innodb –mysql-host=127.0.0.1 –mysql-port=3307 –mysql-user=sbtest –mysql-password=sbpass –oltp…=oltp –db-driver=mysqlmysql-engine-trx=yes –mysql-table-engine=innodb –mysql-host=127.0.0.1 –mysql-port=3307 –mysql-user=sbtest –mysql-password=sbpass –oltp…

Post: Percona Server on the Raspberry Pi: Your own MySQL Database Server for Under $80

… list all IP addresses it assigned, usually together with a host name. While there, you could also assign a permanent IP address (still… percona-server resolving dependencies… looking for inter-conflicts… Targets (4): libaio-0.3.109-6 libmysqlclient-5.5.30-1 mysql-clients… mysqld Connect using the mysql client: [root@alarmpi ~]# /usr/bin/mysql Welcome to the MySQL monitor. Commands end with ; or \g. [...] mysql> SHOW ENGINES…

Post: Is DNS the Achilles heel in your MySQL installation?

resolve in your my.cnf file and restart MySQL. But before you do that, run the following command: mysql> SELECT user, host FROM mysql

Comment: 10+ Ways to Crash or Overload MySQL

… skip_name_resolve, none of that code is called at all. * If a host doesn’t have a valid PTR (ip to host mapping), nothing is ever counted. As you probably know, I’ve been trying to get MySQL to overhaul… hosts for a long time now. My host cache patches are a good start to this: http://jcole.us/patches/mysql/5.0/host

Post: Shard-Query EC2 images available

… avaialble data from 1988 to 2010′; mysql> use ontime1; Database changed mysql> show table status like ‘ontime_fact’G… shown in the EC2 console. That the “private ip” field is selected in the list of columns…=512K read-rnd-buffer-size=1M skip-host-cache skip-name-resolve sort-buffer-size=512K sql-mode…

Post: Are PHP persistent connections evil ?

… connections active between Host “Apache” and HostMySQL“: Port 3306 as connection in TCP/IP protocol is identified by pair of IP addresses and pair… is of course to use multiple IPs on your MySQL server (you’re probably using Intranet range IPs anyway). So one way or… queries running at the same time which may never self-resolve as users will get extremely poor response time and will…

Comment: Is DNS the Achilles heel in your MySQL installation?

Gregory, If there are not –skip-name-resolve MySQL will always resolve host name even if your grant tables only happen to contain IP addresses.