Hi there.
I was reading last week (and of course, i can't find it now) something about
'nicifying' a query, so taht it doesn't lock the table...
How is this done? I've read so much stuff lately, that i can't find it for
the life of me, and google is not being my friend :(
Steve.
--
MySQL
On Mon, Feb 8, 2010 at 3:37 PM, Steve Staples sstap...@mnsi.net wrote:
Hi there.
I was reading last week (and of course, i can't find it now) something
about
'nicifying' a query, so taht it doesn't lock the table...
How is this done? I've read so much stuff lately, that i can't find it
[mailto:vegiv...@gmail.com] On Behalf Of Johan De
Meersman
Sent: February 8, 2010 10:01 AM
To: mysql@lists.mysql.com
Subject: Re: MyISAM no table lock
On Mon, Feb 8, 2010 at 3:37 PM, Steve Staples sstap...@mnsi.net wrote:
Hi there.
I was reading last week (and of course, i can't find it now) something
Hi,
Is that true that MySQL lock table on each query? Does it means will
cause slow speed? Then how to avoid table lock and speed up MySQL? TIA.
Willy
The Public is merely a multiplied me. -- Mark Twain
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
Hi!
sangprabv wrote:
Hi,
Is that true that MySQL lock table on each query? Does it means will
cause slow speed? Then how to avoid table lock and speed up MySQL? TIA.
You need to read up about the different table handlers available.
They have different properties, including the locking
Eli Shemer wrote:
The web site on the other end reads all the data from the table and
generates standard html/css code with the information from the table.
How can I make all of the apache child processes wait for the external
script to complete its operation once it has started?
Hey there
I have an external script that generates a lot of data and dumps it into a
table.
Prior to this ,it removes all the data in this specific table.
It requires both read and write privileges.
The web site on the other end reads all the data from the table and
generates standard
such
such as described here
http://httpd.apache.org/docs/2.0/mod/mpm_common.html#lockfile
Martin
- Original Message -
From: Eli Shemer [EMAIL PROTECTED]
To: mysql@lists.mysql.com
Sent: Sunday, March 02, 2008 10:06 AM
Subject: table lock
Hey there
I have an external script that generates
to roll back
for table lock on AUTO_INC
The behavior observed is most likely related to this
bug report:
http://bugs.mysql.com/bug.php?id=16979
Regards,
-sunny
Oracle/Innobase.
Choose
Hi,
I have been using 5.0.32 MySQL on Debian.
Everything worked properly.
DRBD has been added and configure with MySQL and
restarted.
The tables used are InnoDB type and use
auto_increment.
After that during INSERTs and UPDATEs innodb started
to roll back
for table lock on AUTO_INC
How could
Hi All,
This question just for information sake.
If i do
flush table lock read;
Any changes happening on tables during this period, will it be viewable by
another user or will the user have to wait till the lock is released to see
the new changes
And once the lock is released, does mysql apply
Hi,
Ananda Kumar wrote:
Hi All,
This question just for information sake.
If i do
flush table lock read;
I think you mean FLUSH TABLES WITH READ LOCK?
Any changes happening on tables during this period, will it be viewable by
another user or will the user have to wait till the lock
just for information sake.
If i do
flush table lock read;
I think you mean FLUSH TABLES WITH READ LOCK?
Any changes happening on tables during this period, will it be viewable
by
another user or will the user have to wait till the lock is released to
see
the new changes
And once the lock
. And the changes will be in bin-log till the READ
lock is held.
regards
anandkl
On 5/30/07, Baron Schwartz [EMAIL PROTECTED] wrote:
Hi,
Ananda Kumar wrote:
Hi All,
This question just for information sake.
If i do
flush table lock read;
I think you mean FLUSH TABLES WITH READ LOCK?
Any
Baron-
Thank you for the InnoDB Lock Monitor pointer. I now have a greate deal
of informaiton to digest. I will try innotop when I have a chance.
:)
-Paul
Hi Paul,
Power, Paul C. wrote:
I have an INSERT waiting for a table lock, and i do not
understand why.
---TRANSACTION 0
I have an INSERT waiting for a table lock, and i do not understand why.
---TRANSACTION 0 308691, ACTIVE 5 sec, process no 8876, OS thread id
1296547864 inserting
mysql tables in use 1, locked 1
LOCK WAIT 1 lock struct(s), heap size 320
MySQL thread id 79126, query id 1113322 bil.oneeighty.com
Hi Paul,
Power, Paul C. wrote:
I have an INSERT waiting for a table lock, and i do not understand why.
---TRANSACTION 0 308691, ACTIVE 5 sec, process no 8876, OS thread id
1296547864 inserting
mysql tables in use 1, locked 1
LOCK WAIT 1 lock struct(s), heap size 320
MySQL thread id 79126
I am stumped by a table lock issue. First, some details.
I am running MySQL 5.0.22 on an AMD 64 machine.
mysqld -V outputs:
/usr/local/libexec/mysqld Ver 5.0.22-debug-log for unknown-linux-gnu
on x86_64 (Source distribution)
uname -a:
2.6.8-11-amd64-generic #1 Wed Jun 1 00:42:47 CEST 2005
, 2006 9:31 PM
Subject: Re: Table Lock issue on insert
Hi John,
I have looked around a bit and you might be interested in this part:
InnoDB: Do not intentionally crash mysqld if the buffer pool is
exhausted by the lock table; return error 1206 instead ...
check this link: http://dev.mysql.com
[mailto:[EMAIL PROTECTED]
Sent: Saturday, December 31, 2005 2:59 AM
To: Brittingham, John; mysql@lists.mysql.com
Subject: Re: Table Lock issue on insert
Hi John,
What kind of engine are you using on your table? MyIsam or InnoDB or are
you using merged tables?
If you query your system variables
Message-
From: Danny Stolle [mailto:[EMAIL PROTECTED]
Sent: Saturday, December 31, 2005 2:59 AM
To: Brittingham, John; mysql@lists.mysql.com
Subject: Re: Table Lock issue on insert
Hi John,
What kind of engine are you using on your table? MyIsam or InnoDB or are
you using merged tables?
If you
; is the error gone?
Danny
Brittingham, John wrote:
I am having trouble with table lock.
The query is as follows:
INSERT INTO USERS_PER_HOUR SELECT count( DISTINCT (
CUID
) ),`TV_LOG_DATE`,`TV_LOG_TIME`, INTERFACE_ID
FROM `TV_LOG_ALL`
group by 2,3;
I keep getting this error: #1206
I am having trouble with table lock.
The query is as follows:
INSERT INTO USERS_PER_HOUR SELECT count( DISTINCT (
CUID
) ),`TV_LOG_DATE`,`TV_LOG_TIME`, INTERFACE_ID
FROM `TV_LOG_ALL`
group by 2,3;
I keep getting this error: #1206 - The total number of locks exceeds the
lock table size
Reto,
InnoDB always does locking on the row level. The IS and IX table locks are
'intention locks'. They do not block anything, except full table lock
requests (LOCK TABLES ... WRITE, for example). The main purpose of IX and IS
is to show that someone is locking a row, or going to lock a row
Reto Breitenmoser wrote:
Hi
In the output from the show innodb monitor I can see, that I have a
table lock on a table. But, I never set a table lock on a table
(only row locks). Do I misinterpret the output or what causes this
table lock?
thanks
Reto
TRANSACTIONS
Hi
In the output from the show innodb monitor I can see, that I have a table lock on a table.
But, I never set a table lock on a table (only row locks). Do I misinterpret the output
or what causes this table lock?
thanks
Reto
TRANSACTIONS
Trx id counter 0 95338708
Nick,
http://dev.mysql.com/doc/mysql/en/innodb-monitor.html
you can use innodb_lock_monitor to find out who is locking the row.
Best regards,
Heikki Tuuri
Innobase Oy
Foreign keys, transactions, and row level locking for MySQL
InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up
We have something I can't figure out happening on one of our servers. It's
running 4.0.23 on OSX.
One of the InnoDB tables is locked even though we can't see any process that is
even active that
could have locked it. SHOW OPEN TABLES doesn't show it as in use or locked.
We've tried all sorts
Hi all ,
I have a quick question regarding table locking.
This is a snippet referring to when table locking is disadvantageous:
Another client issues another SELECT statement on the same table. Because UPDATE has
higher priority than SELECT, this SELECT will wait for the UPDATE to finish. It
Every new connection is considered a client. It's a bad idea to try to
do your own scheduling client side to try to defeat table locks
because MySQL can proceed with other clients as soon as the locks are
freed vs your application waiting for a complete result set to return
before proceeding with
Hi,
A quick mysql database question (using innodb) and connection with java.
If someone locks the table with write, can we set
a timeout when we are doing a query on that table, so that that it will
timeout
and throw an exception after say 60 seconds, rather than block ?
/Frank
--
MySQL
This problem is completely repeatable, I'm not the only one having it,
and I've found a (temporary) workaround. I'm not sure if it affects
other machines than AMD64, but it certainly affects them. I've tested
on two now.
If you start MySQL with skip-concurrent-insert, the problem completely
Success with the bug entry. Nice system, too.
http://bugs.mysql.com/bug.php?id=3483
Thanks,
Don
Don MacAskill wrote:
This problem is completely repeatable, I'm not the only one having it,
and I've found a (temporary) workaround. I'm not sure if it affects
other machines than AMD64, but it
FWIW, I'm still having this problem.
I've completely dropped the table and re-built it from the ground up.
It's a bizarre problem... The table is totally simple. A primary key,
and then three varchar fields. The FULLTEXT index spans the 3 varchar
fields. There are only 6500+ rows, so it's
Hi there,
I've got a bizarre problem I can't seem to solve. I have a small MyISAM
table (6533 rows) with a small FULLTEXT index (3 columns per row, an
average of 1 word per column). When I do an INSERT on the table, many
times the thread gets stuck perpetually in Query | update. Future
Mysqlians,
I am trying to determine in some of my database tables should be
converted from MyISAM to Innodb. I have read that a collusion on 10-20% is
the threshold at which one should convert( current # around .3%). However
the table_locks_waited and table_locks_immediate
On Fri, Jan 09, 2004 at 01:43:53PM -0800, trevor%tribenetwork.com wrote:
Mysqlians,
I am trying to determine in some of my database tables should be
converted from MyISAM to Innodb. I have read that a collusion on 10-20% is
the threshold at which one should convert( current #
I'am working with MySQL 3.23.51-Max in a linux box and Visual Fox and Delphi
in a WinXP box, mostly using InnoDB tables.
Is there a way to know wich rows are lockedin a table? is there a function
that returns if a row is locked, or the rows locked in a table? It can be
done with a UDF?
My
I'am working with MySQL 3.23.51-Max in a linux box and Visual Fox and Delphi
in a WinXP box, mostly using InnoDB tables.
Is there a way to know wich rows are lockedin a table? is there a function
that returns if a row is locked, or the rows locked in a table? It can be
done with a UDF?
My
I'am working with MySQL 3.23.51-Max in a linux box and Visual Fox and Delphi
in a WinXP box, mostly using InnoDB tables.
Is there a way to know wich rows are lockedin a table? is there a function
that returns if a row is locked, or the rows locked in a table? It can be
done with a UDF?
My
Patricio,
- Original Message -
From: Patricio Díaz G. [EMAIL PROTECTED]
Newsgroups: mailing.database.mysql
Sent: Monday, December 16, 2002 12:35 AM
Subject: InnoDB table lock status
I'am working with MySQL 3.23.51-Max in a linux box and Visual Fox and
Delphi
in a WinXP box, mostly
On 21-Oct-2002 Mailing Lists wrote:
Hi,
Using MySQL, perl and DBI, is there a way to test to see if a table is
locked (as in LOCK table...). We batch process our updates every 3
hours or so (it's not a set schedule though, it depends when a certain level
of new updates is reached),
Hi,
Using MySQL, perl and DBI, is there a way to test to see if a table is
locked (as in LOCK table...). We batch process our updates every 3
hours or so (it's not a set schedule though, it depends when a certain level
of new updates is reached), and our main tables are locked during this
support: licence
Synopsis: Deadlock between slave stop and table lock
Severity: non-critical
Priority: low
Category: mysql
Class: sw-bug
Release: mysql-3.23.33 (Source distribution)
Environment:
System: SunOS mpsa-c577d4 5.7 Generic_106541-08 sun4u sparc SUNW,Ultra
On Wed, Apr 24, 2002 at 12:45:43PM +0300, Michael Widenius wrote:
I will add to our TODO to add to SHOW OPEN TABLES a list of threads
that has locks on the table (or maybe a SHOW LOCKS command) to
better cover this case in the future.
Could it be SHOW TABLE LOCKS? That way it is not
Hi!
Lopez == Lopez David E-r9374c [EMAIL PROTECTED] writes:
cut
Lopez If no row is returned, then the following happens:
Lopez 1) lock table ...
Lopez 2) select ...
Lopez 3) if no row is returned,
Lopez 4)insert ...
Lopez 5)use LAST_INSERT_ID() to get the value of the key
Hi!
Lopez == Lopez David E-r9374c [EMAIL PROTECTED] writes:
Lopez AntiSpam - mysql, sql, query
Lopez Version: 3.23.49a, MyISAM, NT, Solaris
Lopez My app is 150 daemons writing logs to mysql. The main
Lopez table is of fixed size but depends on four other tables
Lopez for foreign keys (hash
Hi ...
just wanted to added another question to this one...
you suggested to use LAST_INSERT_ID() , but the
question is if there are concurrent access to the
database, how will you get the last id without locking
the table.
Because what I've been doing is also:
1. lock the table
2. get the id
*** REPLY SEPARATOR ***
Hi ...
just wanted to added another question to this one...
you suggested to use LAST_INSERT_ID() , but the
question is if there are concurrent access to the
database, how will you get the last id without locking
the table.
Don't worry about
-
From: Luciano Barcaro [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, April 23, 2002 9:49 AM
Subject: Re: Further Question with -- table lock - which connection id
own's it
*** REPLY SEPARATOR ***
Hi ...
just wanted to added another question to this one...
you
* Shaun Bramley
Depending on how many people are updating this db should ultimately
determine your decision to remove the table locks. If hte db is only
experiencing one person updating it then it is not necessary. However if
multiple people are updating it, then you will want to keep the
[mailto:[EMAIL PROTECTED]]
Sent: Tuesday, April 23, 2002 12:59 AM
To: Lopez David E-r9374c
Cc: Mysql List (E-mail)
Subject: table lock - which connection id own's it
Hi!
Lopez == Lopez David E-r9374c [EMAIL PROTECTED] writes:
Lopez AntiSpam - mysql, sql, query
Lopez Version: 3.23.49a, MyISAM, NT
Lopez David E-r9374c writes:
Monty
BTW, it's a thrill to hear from the CTO.
The procedure for locking a table is more complex but will
attempt to describe it further for you. Any of the 150 daemons
can insert to the hash tables. The data in the row can be used
by all 150 daemons. The
AntiSpam - mysql, sql, query
Version: 3.23.49a, MyISAM, NT, Solaris
My app is 150 daemons writing logs to mysql. The main
table is of fixed size but depends on four other tables
for foreign keys (hash tables). These tables are uploaded
once to the daemon at start-up. Occasionally, a new entry
I have a table with over 60,000 records, I have a text field that is a
full text index. I need to change it to medium text. My question is can
it do it without taking the site offline. will the table still be able
to serve select queries while the alter is running or will they be locked until
Hi, Is there a way to lock a table so that only one user can change it and
then unlockit?
I need to do this coz I want visitors to retrieve some values from a
database but each value must be retrieved only by one user and then marked
up to be expired, so I don't want two users to retrieve the
Hi Hayan,
have a look at:
http://www.mysql.com/doc/L/O/LOCK_TABLES.html
for information on (un)locking tables.
At 11:48 28.01.02 +0300, you wrote:
Hi, Is there a way to lock a table so that only one user can change it and
then unlockit?
I need to do this coz I want visitors to retrieve some
(E-mail)
Subject: Table Lock
Hi, Is there a way to lock a table so that only one user can change it and
then unlockit?
I need to do this coz I want visitors to retrieve some values from a
database but each value must be retrieved only by one user and then marked
up to be expired, so I don't want
Hi, Is there a way to lock a table so that only one user can change it and
then unlockit?
I need to do this coz I want visitors to retrieve some values from a
database but each value must be retrieved only by one user and then marked
up to be expired, so I don't want two users to retrieve the
Vasoczki,
Monday, January 28, 2002, 12:20:21 PM, you wrote:
VF Yes, i need this too but for a whole database. i just thought, if there is a
VF power loss, and the database is get stuck, the users won't able to connect
VF again ...
It should be a very fanciful power failure and hardware failure
Hi,
I have one concern about multithread.
I am building online exam system. many students can
get access to one table in one time. Should i use
table lock every time when one student get access to
the table. As i know, mysql is multithread,that means
it already incorporate the table lock feature
On Mon, Jan 28, 2002 at 12:00:43PM -0500, bin cai wrote:
Hi,
I have one concern about multithread. I am building online exam
system. many students can get access to one table in one
time. Should i use table lock every time when one student get access
to the table. As i know, mysql
: Read/write table lock
Fabio Galarraga wrote:
Hi to all:
Somebody knows how to make a read/writa table lock?
I'm trying with java source:
stmt.execute("LOCK TABLES table-x READ, table-x WRITE");
stmt.execute("UNLOCK TABLES");
but it fails.
B
: 'Mysql mailing list'
Asunto: Re: Read/write table lock
Fabio Galarraga wrote:
If you issue a READ lock, nobody can write to the table.
If you Issue a Write lock, only you may read or write to the table.
Nobody can read a file you have locked for write.
Hi to all:
Somebody knows
Hi to all:
Somebody knows how to make a read/writa table lock?
I'm trying with java source:
stmt.execute("LOCK TABLES table-x READ, table-x WRITE");
stmt.execute("UNLOCK TABLES");
but it fails.
Best regards,
Fabio Galarr
On Tue, Mar 20, 2001 at 03:05:53PM -0300, Fabio Galarraga wrote:
Hi to all:
Somebody knows how to make a read/writa table lock?
I'm trying with java source:
stmt.execute("LOCK TABLES table-x READ, table-x WRITE");
stmt.execute("UNLOCK TABLES");
but it fails.
A
Fabio Galarraga wrote:
Hi to all:
Somebody knows how to make a read/writa table lock?
I'm trying with java source:
stmt.execute("LOCK TABLES table-x READ, table-x WRITE");
stmt.execute("UNLOCK TABLES");
but it fails.
Best regards,
Fabio Galarraga
[EMA
If OPTIMIZE TABLE appears to be writting to a temporary file
while it works (.TMM).. Why must it lock readers out of the original
table file?
-
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
Hi there,
I heard MySQL 3.23.30 was released and support transaction with BDB tables,
I want to know if I use BDB tables, will MySQL not use BIG TABLE LOCK in BDB tables?
we plan to build a very busy web server, and very care about this issue.
Regards,
David
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