Mysql- "FLUSH TABLES WITH READ LOCK" started automatically

Posted by ming yeow on Stack Overflow See other posts from Stack Overflow or by ming yeow
Published on 2010-05-13T03:45:15Z Indexed on 2010/05/13 3:54 UTC
Read the original article Hit count: 206

Filed under:

mysql

|

database-administration

|

locking

I would like to understand how this happened. I was running a query that would take a long time, but should not lock up any table. However, my dbs were practically down - it seems like it was being locked up by "FLUSH TABLES WITH READ LOCK"

03:21:31 select type_id, count(*) from guid_target_infos group by type_id
02:38:11 select type_id, count(*) from guid_infos group by type_id
02:24:29 FLUSH TABLES WITH READ LOCK

But i did not start this command. can someone tell me why it was started automatically?

© Stack Overflow or respective owner

Related posts about mysql

How to remove MySQL completely with config and library files on ubuntu 12.04 gnome 3.0

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I tried everything till now: sudo apt-get remove mysql-server mysql-client mysql-common sudo apt-get purge mysql-server mysql-client mysql-common sudo apt-get autoremove and even more commands... But whenever I am trying to locate mysql. I get a no. of files related to mysql command: shell>>… >>> More
mysql: Cannot load from mysql.proc. The table is probably corrupted

as seen on Server Fault - Search for 'Server Fault'
Mysql was started: /usr/bin/mysqld_safe --datadir=/srv/mysql/myDB --log-error=/srv/mysql/logs/mysqld-myDB.log --pid-file=/srv/mysql/pids/mysqld-myDB.pid --user=mysql --socket=/srv/mysql/sockets/mysql-myDB.sock --port=3700 but when I'm trying to do something: ERROR 1548 (HY000) at line 1: Cannot… >>> More
Why is there a /etc/init.d/mysql file on this Slackware machine? How could it have gotten there?

as seen on Server Fault - Search for 'Server Fault'
A client of my IT-consulting service owns a web-development shop. He's been having problems with a Slackware 12.0 server running MySQL 5.0.67. The machine was set up by the client's sysadmin, who left on bad terms. My client no longer employs a sysadmin. As far as I can tell, the only copy of MySQL… >>> More
mysql: Bind on unix socket: Permission denied

as seen on Server Fault - Search for 'Server Fault'
Can't start mysql with: sudo /usr/bin/mysqld_safe --datadir=/srv/mysql/myDB --log-error=/srv/mysql/logs/mysqld-myDB.log --pid-file=/srv/mysql/pids/mysqld-myDB.pid --user=mysql --socket=/srv/mysql/sockets/mysql-myDB.sock --port=3700 120222 13:40:48 mysqld_safe Starting mysqld daemon with databases… >>> More
MySQL – Learning MySQL Online in 6 Hours – MySQL Fundamentals in 320 Minutes

as seen on SQL Authority - Search for 'SQL Authority'
MySQL is one of the most popular database language and I have been recently working with it a lot. Data have no barrier and every database have their own place. I have been working with MySQL for quite a while and just like SQL Server, I often find lots of people asking me if I have a tutorial which… >>> More

Related posts about database-administration

Database Administration as a Service

as seen on Simple Talk - Search for 'Simple Talk'
A DBA should provide two things, a service and leadership. For Grant Fritchey, it was whilst serving a role in the Scouts of America that he had his epiphany. Creative chaos and energy, if tactfully harnessed and directed, led to effective ways to perform team-based tasks. Then he wondered why these… >>> More
Breaking into database administration

as seen on Programmers - Search for 'Programmers'
Hello to all, I am brand new on this site and look forward to interacting with each of you. I am graduating in June with my Bachelors Degree in Computer Information Systems with hopes of become a DBA in the future. I am currently taking a Database class now and studying SQL Server/T-SQL on the side… >>> More
Video learning material on Oracle Database Administration 9i

as seen on Server Fault - Search for 'Server Fault'
Hi All, Could anyone please let me know from where can i download free video learning materials on Oracle Database Administration 9i or higher. Awaiting your comments Regards, Srijith >>> More
Web based database administration and browsing for PostgreSQL

as seen on Stack Overflow - Search for 'Stack Overflow'
Do you know any free or affodrable web based database administration and browsing tool for PostgreSQL? Something like phpMyAdmin for MySQL and better than phpPgAdmin. For MySQL I found Chive that looks promissing. I'm looking for something similiar for PostgreSQL. >>> More
Why the “Toilet” Analogy for SQL might be bad

as seen on SQL Blog - Search for 'SQL Blog'
Robert Davis(blog/twitter) recently blogged The Toilet Analogy … or Why I Never Recommend Increasing Worker Threads , in which he uses an analogy for why increasing the value for the ‘max worker threads’ sp_configure option can be bad inside of SQL Server. While I can’t make an argument against… >>> More