Server :: Mysql "flush Logs" Or "flush Tables With Read Lock?
Jan 15, 2010
policy is to backup mysql with mysql-zrm.However at a certain stage it hangs forever. This is at the "flush logs". I tried this manually and it gave the same result. Even after restarting mysql and the host. After some googling and trying I found out "flush tables with read lock" gives the same result. The tables seem to be MyIsam. I tried with a mysqldump on one server and restore it on a test vm. I used the same config and flush logs still hangs. ALso I tried to change some configuration directives... but with the same result
Edit: btw, I checked the logfile and didn't found anything (/var/log/mysqld.log)
Edit2: I also did myisamchk -s *.MYI (in all direcoties with db files;actually did it with find command) and it did not return anything so datafiles seem ok.
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Jan 23, 2010
I am attempting to write a backup script that will do the following:
1) lock and flush tables on a mysql db
2) dump the db to a file
3) unlock the tables
4) rsync the file to offsite storage
It all seems to be going well. However, obviously I don't want to setup ssh to the storage server on another network as the root user without a password. so I am attempting to su as the backup user inside of the script but when I try to run the script everything happens as it should until I try to so.. then it jumps out of the script .. akss me to login as the backup user.. proceeds to rsync to the offsite storage it does all this and then resumes execiting the script. it is not going to be setup as a cron job. it will be executed manually. assuming that is the case, how can I get the script to run without prompting for a password?
Here is what I've come up with so far... assuming that the script is run as root and the identity of the backup user will need to be assumed inside the script without perstering the user to enter the backup user's password.
[Code]....
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Jul 28, 2010
I have recently upgraded my Debian unstable to the new custom 2.6.34 kernel. The system is unresponsive and top shows two processes (flush-8:0 & flush-8:16) taking up most of the cpu time.
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May 9, 2010
Slackware64 13.0 I have a website that has been migrated to a new server. After a few days I'm still pointing at the old server and the hosting company have recommended that I flush my dns cache. A quick google for this in linux seemed to recommend restarting the nscd daemon but nscd -g tells me it's not running anyway. I connect to Virginmedia via wired ethernet to a Belkin N1 router so is there a way I can do this I wonder, either via Virginmedia or Slackware?
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Mar 16, 2011
I have an HP printer for my Lenny which has worked for some year. But I don't remember what method I used to install it. So this is one piece of the puzzle that I can't see. But like I said the printer works. One day I accidentally printed more than I had papers in the printer-machine. Then I kind of stacked a lot of print jobs in the queue out of frustration. So whenever I reboot the PC/Lenny then it waste some paper by printing things that got stuck in the printer queue. It's not very environmental this weird behavior.
So next time this happens how do I flush the Printer queue so Lenny doesn't remember what happened before the reboot? I followed these instructions earlier but it only switched one weird behavior with another weird behavior. So it didn't work for my Lenny, and I couldn't find any better solutions on the Internet. [URL]...
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Aug 2, 2010
I believe I have unwanted ' characters left in a 9 element character array that are causing subsequent operations with it to fail. I see wildly differing views on the web on the proper way to flush 'em. It's clearly not as simple as it would appear at first sight. What's currently the best (or else "least deprecated") method?
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May 20, 2010
I always find kdmflush & flush-253 in the processlist. Does somebody know where it comes from and what it does?
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Oct 21, 2010
store the dns cache over the reboot in linux(which should not flush the dns cache on reboot).
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Oct 21, 2010
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Jul 1, 2010
I was rather intrigued by the large number of xfs bug fixes in the recent kernel update for Lucid.
Code:
aptitude changelog linux-image-2.6.32-23-server | grep -c xfs:
20
20!
Poking around reveals that one Dave Chinner, Principal Engineer -- SGI Australian Software Group, submitted a series of patches to deal with preventing the flushing of stale inodes. I'm trying to figure out just how relevant those patches are to the stability of XFS, especially to pre-Lucid Ubuntu systems: are they in danger of data loss? Some quick search results thrown together in an effort to asses this issue:[URL]..Quote:
Dave Chinner (9):
xfs: Don't flush stale inodes
xfs: Ensure we force all busy extents in range to disk
xfs: reclaim inodes under a write lock
xfs: Avoid inodes in reclaim when flushing from inode cache
[Code]...
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Feb 16, 2011
why does my virtual machine freezes when I flush iptable rules. i tried to install virtual machines 3 times and every time I flush iptables on host, virt machine freezes down. What can be the issue? Is it with the host installation or something else?
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Jan 7, 2011
I created a script to flush my sendmail to another mailserver. Because it takes some time I want to give some simple feedback using a rotating bar.
Code:
I'm convinced this can be done much nicer with 'awk' and printf, but somehow awk makes me dazzle..
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Dec 21, 2010
Is it possible to remove the "flush" flag when mounting removable disks in KDE4 without recompiling KDE4? Can it be done in some config file(s)? Thanks!
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Jun 14, 2010
I am using Joomla and a script within it. That Script is suppose to copy tables from one DB to another.
Code:
Error(1) [1142] query [CREATE OR REPLACE VIEW test_users AS SELECT * FROM `localiz_master`.`jos_users`]. DB Error: CREATE VIEW command denied to user 'localiz_master'@'localhost' for table 'test_users' SQL=CREATE OR REPLACE VIEW test_users AS SELECT * FROM `localiz_master`.`jos_users`
Error [1142] retrying query [CREATE OR REPLACE VIEW test_users AS SELECT * FROM `localiz_master`.`jos_users`]. DB Error: CREATE VIEW command denied to user 'localiz_master'@'localhost' for table 'test_users' SQL=CREATE OR REPLACE VIEW test_users AS SELECT * FROM `localiz_master`.`jos_users`
localiz_master: name of the DB from which data is suppose to be copied.
jos_users: name of the table form the main DB.
localiz_master: user for the DB.
localhost: host
test_users: name of the table to be created.
We do have phpmyadmin but the user's table is hidden. What SSH command we might run to make localiz_master user have access to all the databases.
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May 6, 2010
On Windows I have used XBBrowser, which provides a custom version of Firefox suited to using Tor.XBBrowser provides a button, flush tor circuit, which will setup an entirely new connection and exit node.I am wondering how to do the equivalent thing on Linux. ALl I can do is restart tor, which does not seem to make any difference.
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Jul 31, 2010
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Feb 2, 2011
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Jul 21, 2009
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Jun 1, 2011
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Sep 20, 2010
When I execute the command below, does mysqldump lock all tables while the backup is in process? I want to make sure this is the appropriate type of backup command for MyISAM database.
mysqldump -h myhostname --default-character-set=utf8 -u root --password=mypassword --opt --single-transaction DBname > /root/backup.sql
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Nov 18, 2009
I want to write the shell script which
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Jan 24, 2011
I'm running Mysql server. I need to know if is possible to generate an alert (email) when in the database are locked tables.
Is that possible?
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Dec 11, 2009
Can't single the cause of the error.
mysql> CREATE TABLE Shipment (
-> Shipment_ID INT(10) NOT NULL,
-> Delivery_ID INT(10) NOT NULL,
-> Customer_ID INT(10) NOT NULL,
-> Driver_Employee_ID INT(10) NOT NULL,
-> Consignee VARCHAR(255) NOT NULL,
-> Payment_Method VARCHAR(255) NOT NULL,
-> Payment_Received VARCHAR(1) NOT NULL,
-> CONSTRAINT PRIMARY KEY (`Shipment_ID`)
-> FOREIGN KEY (`Delivery_ID`) REFERENCES `Delivery`(`Delivery_ID`)
-> FOREIGN KEY (`Customer_ID`) REFERENCES `Customer`(`Customer_ID`)
-> FOREIGN KEY (`Driver_Employee_ID`) REFERENCES `Driver`(`Driver_Employee_ID`)
-> )ENGINE=InnoDB DEFAULT CHARSET=latin1;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FOREIGN KEY (`Delivery_ID`) REFERENCES `Delivery`(`Delivery_ID`)
FOREIGN KEY (`C' at line 10)
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Dec 21, 2010
Is there somebody knows about how to convert or changes tables on MySQL ?
I was working a lot of months with MySQL with localhost. And now will setting up to MySQL database Cluster. I was success to setup the clustered with "MySQL-Cluster-gpl-7.0.16" on CentOS environment.
But, when I tried to restore database from localhost to clustering system, I get this message error when do changes from MyISAM to NDBCLUSTER Tables "Error, Can't create table 'dbname.sql-3ef9_a8'(errno: 708).
How can I changes the table?
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Feb 6, 2010
In my fresh FC12 install, I installed the MySQL server and it has a database called "mysql" with several tables. A couple of these tables, "plugin" and "server" in particular, appear to be corrupt. Anyone else experience this? Fix?
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Apr 7, 2009
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Apr 23, 2011
how to turn off all mysql logs because mysql is using too many resources. I turned slow queries log and there is no slow queries here is what I want to turn off the logs maybe this is causing mysql to high load ?
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May 9, 2011
"Which logs should I read to try to establish the cause of a crash?"
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Sep 15, 2010
I had Configured a MySQL Master-Slave replication.It seems that the binary logs steals so much space of My storage.
i.)My Master
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000144 | 475823 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
ii.)My Slave.
mysql> SHOW SLAVE STATUSG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.277.55.141
[code]....
If i remove all binary files up tp mysql-bin.000144 using "PURGE",will it affect my existing database/any data loss.
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Jun 7, 2011
I think this goes here, but I'm not sure. I decided that XAMPP had been troublesome enough. MySQL never worked. So I decided to instal the LAMP stack offered by YaST. I went about installing it thinking that it would all work. But it seems that I was wrong. So I try to start mysql, and here's what I get:
Code:
the-matrix:~ # mysql start
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/mysql/mysql.sock' (2) or
Code:
the-matrix:~ # rcmysql start
Starting service MySQL warning: /var/mysql/mysql.sock didn't appear within 30 seconds
chmod: cannot access `/var/run/mysql/mysqld.pid': No such file or directory
[Code]...
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