… do to perform backup of MySQL Database (or create slave) using LVM2 on Linux. 1) Connect to MySQL and run FLUSH TABLES WITH… 16GB in this case. If your undo size is not large enough snapshot will get invalidated and backup will be aborted. Sometimes… you want to let MySQL Server to continue, which is done by running UNLOCK TABLES or simply closing connection. 5) Mount backup…
Comment: How to track down the source of Aborted_connects
January 30, 2013 By 19 Comments
Or…..you can just set the log-warnings variable to greater than 1. This will start logging the aborted connections in the mysql log. It’s not as detailed as tcpdump. However, in some cases running tcpdump is not an option.
Post: Percona XtraDB Cluster: Failure Scenarios with only 2 nodes
July 25, 2012 By 6 Comments
… test to use the mysql server: [root@percona1 ~]# mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 868… than group seqno (5): states diverged. Aborting to avoid potential data loss. Remove ‘/var/lib/mysql//grastate.dat’ file and restart if…” in my.cnf Then we can insert in both nodes without any problem when the connection between the nodes is gone: percona1 mysql> insert…
Comment: MySQL Server Memory Usage
September 1, 2006 By 21 Comments
…Connections:259 ‘Aborted_clients’, ’267108′ ‘Aborted_connects…mysql/mysql.pid datadir=/db/disk2/mysql/data log-bin=/var/log/mysql/log log-slow-queries=/var/log/mysql/slow-queries.log max_connections…
Comment: Percona XtraDB Cluster reference architecture with HaProxy
August 13, 2012 By 63 Comments
… HDD ). I think this could be a problem for us in our environment because this cannot be explained at all, no…) FATAL: failed to connect to database server! FATAL: unable to connect to MySQL server, aborting… FATAL: error 2003: Can’t connect to MySQL server on ’172…) FATAL: failed to connect to database server! FATAL: unable to connect to MySQL server, aborting… FATAL: error 2003: Can’t connect to MySQL server on ’172…
Comment: Apache PHP MySQL and Runaway Scripts
May 21, 2008 By 20 Comments
… is unusual. In fact it is quite close to MySQL case – if client is gone SELECT * FROM tbl; will be aborted virtually instantly…. It should be possible to check if connection is alive from the server. connection_aborted() could in theory do that but it does not do it – which is good thing to keep in mind. MySQL SLEEP() function…
Comment: Why do you need many apache children ?
February 17, 2008 By 15 Comments
… overloaded. So mysql connection opened in slow HTTP connection reaches to wait_timeout and MySQL aborts those mysql connections. There were about 200 Aborted_Clients per hour in mysql error log. After changing Timeout directive in…
Comment: How to track down the source of Aborted_connects
August 24, 2008 By 19 Comments
… extensions are must to have in MySQL. At least very basics it would be good to split Aborted_connects to network related and Authentication_Failures as these are very different events. Aborted_clients may also benefit splitting somehow because unexpected aborts…
Comment: 10+ Ways to Crash or Overload MySQL
November 14, 2007 By 20 Comments
…, it’s strange. Aborted_connects has no relation to max_connect_errors. The only place it’s ever checked is in sql/sql_parse.cc: 848 if (!(specialflag & SPECIAL_NO_RESOLVE)) 849 { … 861 if (connect_errors > max_connect_errors) 862…. As you probably know, I’ve been trying to get MySQL to overhaul how it handles hosts for a long time…
Post: Percona Toolkit Webinar followup Q&A
December 19, 2012 By 1 Comment
… installed. Q: How to make the tools connect to MySQL The slides are now available here, and slide … (part of) the table can make the tool abort with a ‘Lock wait timeout exceeded’ error. The … differences are introduced while the sync is happening. In other words: bad data usually leads to more …
