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  • mysql my.cnf ignored

    - by mr12086
    [issue] I'm trying to modify a my.cnf value on my production server but the changes aren't taking effect after a sudo service mysql restart, using an exact copy of the my.cnf (downloaded and replaced original) on my development server the changes made are visible from show variables in mysql commandline. my.cnf is located at /etc/mysql/my.cnf sudo find / -name my.cnf /etc/mysql/my.cnf So only one file exists on the entire system.. Production is ubuntu 10.04 LTS 64bit Development is ubuntu 11.10 32bit Mysql versions are 5.1.61 & 5.1.62 respectively. Kind Regards, [my.cnf] yes it seems to have had all the comments removed and replaced with whitespace. [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking bind-address = 127.0.0.1 key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 myisam-recover = BACKUP query_cache_limit = 1M query_cache_size = 16M log_error = /var/log/mysql/error.log expire_logs_days = 10 max_binlog_size = 100M innodb_file_per_table = 1 [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] [isamchk] key_buffer = 16M !includedir /etc/mysql/conf.d/

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  • MySQL moving ibdata & ib_logfile

    - by XoR
    I'm trying to move ibdata & ib_logfile on ssd drive. I tried this way, but it don't work: service mysql stop cd /var/lib/ cp -ra mysql mysql_backup cp -a mysql/ibdata1 mysql/ib_logfile* /ssd_drive/mysql my.cnf looks like this (relevant parts): innodb_log_group_home_dir=/ssd_drive/mysql innodb_data_home_dir=/ssd_drive/mysql After all changes I get following errors: InnoDB: Unable to lock /ssd_drive/mysql/ibdata1, error: 13 InnoDB: Check that you do not already have another mysqld process Do I need to remove some lock files, or there is something else that I forgot... Also I setup mysql apparmor so it can rw on this directory, and rebooted afterward: /usr/sbin/mysqld { ................. /ssd_drive/mysql/* rw, ................. }

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  • Changing startup parameters for MySQL

    - by RN
    I need to remove skip-networking from MySQL startup parameters I am running MySQL on Linux on Centos on a VPS Can someone please tell a newbie how to do this ? I suppose to start and stop the mySQL server, I have to do something like this /etc/init.d/mysqld stop /etc/init.d/mysqld start ps -ef|grep 'mysql' root 11331 20220 0 10:53 pts/0 00:00:00 grep mysql root 32452 1 0 Apr02 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --skip-grant-tables --skip-networking mysql 32504 32452 0 Apr02 ? 00:00:18 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --socket=/var/lib/mysql/mysql.sock --skip-grant-tables --skip-networking

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  • MySQL password changed every other day in windows?

    - by PHP
    Every morning when I check server status,I will find MySQL's password is changed: mysql -uuser -ppassword will report ERROR 1045 (28000): Access denied for user 'user'@'localhost' (using password: YES) And then I restart server,and when it's up,MySQL will be back to normal. It has now become a routinely job. What can be the cause for this? How can I know what's exactly happening to MySQL? Here is the error log: 100122 10:11:16 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: Normal shutdown 100122 10:11:16 InnoDB: Starting shutdown... 100122 10:11:18 InnoDB: Shutdown completed; log sequence number 0 22939338 100122 10:11:18 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: Shutdown complete 100122 10:12:40 InnoDB: Started; log sequence number 0 22939338 100122 10:12:42 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: ready for connections. Version: '5.0.24-community-nt' socket: '' port: 3306 MySQL Community Edition (GPL) 100123 16:20:44 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: Normal shutdown 100123 16:20:44 InnoDB: Starting shutdown... 100123 16:20:46 InnoDB: Shutdown completed; log sequence number 0 22939832 100123 16:20:46 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: Shutdown complete 100123 16:22:09 InnoDB: Started; log sequence number 0 22939832 100123 16:22:11 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: ready for connections. Version: '5.0.24-community-nt' socket: '' port: 3306 MySQL Community Edition (GPL) 100125 9:18:59 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: Normal shutdown 100125 9:18:59 InnoDB: Starting shutdown... 100125 9:19:00 InnoDB: Shutdown completed; log sequence number 0 22941001 100125 9:19:00 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: Shutdown complete 100125 9:20:22 InnoDB: Started; log sequence number 0 22941001 100125 9:20:25 [Note] D:\MySQL\MySQL Server 5.0\bin\mysqld-nt: ready for connections. Version: '5.0.24-community-nt' socket: '' port: 3306 MySQL Community Edition (GPL)

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  • Does MySQL log successful or attempted queries?

    - by Nathan Long
    I'm trying to track down a hit-or-miss bug in a web application. Sometimes a request completes just fine; sometimes it hangs and never finishes. I see that Apache now has several requests listed on the server-status page as "sending reply," and that doesn't change. I'm testing on localhost, so there shouldn't ever be more than one. Out of curiosity, I set MySQL to log all queries and I'm tail -fing the log file. When things go OK, I see a pattern like this: 20 Connect root@localhost on dbname 20 Query (some query #1) 20 Query (some query #2) (etc) 20 Quit 21 Connect (etc) When it hangs, I see a pattern like this: 22 Connect root@localhost on dbname 22 Query (some query #1) //nothing happens, so I try the post again 23 Connect root@localhost on dbname 23 Query (some query #1) //nothing happens; try again 24 Connect (etc) Here's my question: is MySQL logging attempted queries, or successful queries? In other words, if the last line I see is query #1, does that imply that query #1 or query #2 is hanging? My guess is that the one I don't see is the problem, because the last one I see looks fine, but maybe the one I don't see is too screwed-up for MySQL to process. Thoughts?

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  • MySQL replicate multiple places

    - by Frederik Nielsen
    Very trick task to find a good title for this question, but here goes the q: I have a few development machines, where I develop my PHP applications on, and testing via a local webserver. This works out pretty well for each machine. However, I would like to replicate the DB from my machines to a central location. So, to sum up: DEV1 - CENTRAL DEV2 - CENTRAL DEV3 - CENTRAL CENTRAL - DEV1 CENTRAL - DEV2 CENTRAL - DEV3 I hope this makes sense, as I cannot find an easy way to tell it. Basically, it is a 2-way replication, where all 4 databases contain the same info, and each of them can be updated locally, to then be pushed out to the others. Is this actually doable? All my dev machines are running Windows 7, and my central DB server is running CentOS 6.

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  • Mysql Master-ColdMaster

    - by enedebe
    I explain my case: I'm at Amazon AWS and I want to be fault tolerant on a entire region failure. My basic problem is to have the db in sync with 2 regions. My options: Master-Master (high lag) Hand made sync every 5 minutes Master-ColdMaster?! (copy on the fly but Master won't wait the other region commit) In my system we could afford loosing a piece of data (we're not a bank) the last inserts in the db, but we could not afford more than 10 minutes of downtime. The database is small and the level of inserts is low, and I wouldn't affect the normal usage waiting other region commit. Is the 3 solution posible? And the most important, once the primary fail how we can detect and change the rol between master-coldmaster -- coldmaster-master ? Is there any clean-mode to restore between failure? Thank's!

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  • MySQL timeout only from office network to remote server, but other connections are fine

    - by Adam
    I've been developing these apps just fine on a local machine as has my co worker. We recently moved our work desks so we're now on a different floor of the building, but we only have one router that we're connected to. Since then, connecting to this one server appears to timeout more often than not. Occasionally I get through, and the loading is instantaneous. Anyhow we have these connections that were tested 1. my computer -> office network -> php pdo -> mysql server A - timeout 2. my computer -> office network -> mysql cli -> mysql server A - timeout 3. my computer -> office network -> mysql cli -> mysql server A - timeout 4. another pc -> office network -> mysql cli -> mysql server A - timeout 5. my computer -> mobile network -> mysql cli -> mysql server A - ok 6. my computer -> office network -> ssh server A -> mysql server A - ok 7. my computer -> office network -> ssh server B -> mysql server A - ok 8. server B web app -> php pdo -> mysql server A - ok 9. my computer -> office network -> php pdo -> mysql server B - ok 10. my computer -> office network -> mysql cli -> mysql server B - ok This has really stumped me.

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  • Ubuntu 12.04: Unable to add or delete a user named 'mysql'

    - by Afaque H
    I am trying to install MySql on Ubuntu 12.04 but the installation is failing with the error: "Can't change to run as user 'mysql'. Check if the user 'mysql' exits." So I go ahead type in the command : 'cat /etc/passwd | grep mysql' and result is null. I try to add a user 'mysql' by issuing the command 'useradd mysql'/. But it fails with the message: 'useradd: user 'mysql' already exists'. When I try to delete the user 'mysql' using the command 'userdel mysql' it also fails with the message "userdel: cannot remove entry 'mysql' from /etc/passwd." Can anyone explain me what's going on and suggest a solution.

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  • mysql partitioning

    - by Yang
    just want to verify that database partition is implemented only at the database level, when we query a partitioned table, we still do our normal query, nothing special with our queries, the optimization is performed automatically when parsing the query, is that correct? e.g. we have a table called 'address' with a column called 'country_code' and 'city'. so if i want to get all the addresses in New York, US, normally i wound do something like this: select * from address where country_code = 'US' and city = 'New York' if now the table is partitioned by 'country_code', and i know that now the query will only be executed on the partition which contains country_code = US. My question is do I need to explicitly specify the partition to query in my sql statement? or i still use the previous statement and the db server will optimize it automatically? Thanks in advance!

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  • MySQL query killing my server

    - by Webnet
    Looking at this query there's got to be something bogging it down that I'm not noticing. I ran it for 7 minutes and it only updated 2 rows. //set product count for makes $tru->query->run(array( 'name' => 'get-make-list', 'sql' => 'SELECT id, name FROM vehicle_make', 'connection' => 'core' )); while($tempMake = $tru->query->getArray('get-make-list')) { $tru->query->run(array( 'name' => 'update-product-count', 'sql' => 'UPDATE vehicle_make SET product_count = ( SELECT COUNT(product_id) FROM taxonomy_master WHERE v_id IN ( SELECT id FROM vehicle_catalog WHERE make_id = '.$tempMake['id'].' ) ) WHERE id = '.$tempMake['id'], 'connection' => 'core' )); } I'm sure this query can be optimized to perform better, but I can't think of how to do it. vehicle_make = 45 rows taxonomy_master = 11,223 rows vehicle_catalog = 5,108 rows All tables have appropriate indexes

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  • PDO update query with conditional?

    - by dmontain
    I have a PDO mysql that updates 3 fields. $update = $mypdo->prepare("UPDATE tablename SET field1=:field1, field2=:field2, field3=:field3 WHERE key=:key"); But I want field3 to be updated only when $update3 = true; (meaning that the update of field3 is controlled by a conditional statement) Is this possible to accomplish with a single query? I could do it with 2 queries where I update field1 and field2 then check the boolean and update field3 if needed in a separate query. //run this query to update only fields 1 and 2 $update_part1 = $mypdo->prepare("UPDATE tablename SET field1=:field1, field2=:field2 WHERE key=:key"); //if field3 should be update, run a separate query to update it separately if ($update3){ $update_part2 = $mypdo->prepare("UPDATE tablename SET field3=:field3 WHERE key=:key"); } But hopefully there is a way to accomplish this in 1 query?

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  • Update query with conditional?

    - by dmontain
    I'm not sure if this possible. If not, let me know. I have a PDO mysql that updates 3 fields. $update = $mypdo->prepare("UPDATE tablename SET field1=:field1, field2=:field2, field3=:field3 WHERE key=:key"); But I want field3 to be updated only when $update3 = true; (meaning that the update of field3 is controlled by a conditional statement) Is this possible to accomplish with a single query? I could do it with 2 queries where I update field1 and field2 then check the boolean and update field3 if needed in a separate query. //run this query to update only fields 1 and 2 $update_part1 = $mypdo->prepare("UPDATE tablename SET field1=:field1, field2=:field2 WHERE key=:key"); //if field3 should be update, run a separate query to update it separately if ($update3){ $update_part2 = $mypdo->prepare("UPDATE tablename SET field3=:field3 WHERE key=:key"); } But hopefully there is a way to accomplish this in 1 query?

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  • MySQL parameter resource error

    - by Derek
    Here is my error: Warning: mysql_query() expects parameter 2 to be resource, null given... This refers to line 23 of my code which is: $result = mysql_query($sql, $connection) My entire query code looks like this: $query = "SELECT * from users WHERE userid='".intval( $_SESSION['SESS_USERID'] )."'"; $result = mysql_query($query, $connection) or die ("Couldn't perform query $query <br />".mysql_error()); $row = mysql_fetch_array($result); I don't have a clue what has happpened here. All I wanted to do was to have the value of the users 'fullname' displayed in the header section of my web page. So I am outputting this code immediately after to try and achieve this: echo 'Hello '; echo $row['fullname']; Before this change, I had it working perfectly, where the session variable of fullname was echoed $_SESSION['SESS_NAME']. However, because my user can update their information (including their name), I wanted the name displayed in the header to be updated accordingly, and not displaying the session value.

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  • mysql - check if data exists across multiple tables

    - by Dd Daym
    I am currently running this query inside MySQL to check if the specified values exists within the table associated with them. SELECT COUNT(artist.artist_id), COUNT(album.album_id), COUNT(tracks.track_id) FROM artist, album, tracks WHERE artist.artist_id = 320295 OR album.album_id = 1234 OR tracks.track_id = 809 The result I get from running this query is all 1, meaning that all the statements after the WHERE clause is true. To further check the query's reliability, I changed the tracks.track_ = 809 to 802, which I know does not match. However the results displayed are still all 1, meaning that they were all successfully matched even when I purposefully inserted a value which would not have matched. How do I get it to show 1 for a match and 0 for no matches within the same query? EDIT: I have inserted an image of the query running

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  • MySQL 5 multiple JOIN syntax not working in MySQL 4

    - by draco
    Hello all, the current SQL query works fine locally on MAMP 1.8.4 running MySQL 5.1.37. SELECT EL.log_actions, EL.log_date, EL.log_value, EL.log_type, EA.admins_name, EU.users_name, EU.users_matric FROM events_log EL JOIN events_users EU USING (users_id) JOIN events_admins EA USING (admins_id) ORDER BY EL.log_id DESC LIMIT 0, 10 However, when I bring this query live to production server which is running MySQL 4.1.22-standard, the following error occurred (whether or not there are data in the entry). A Database Error Occurred Error Number: 1054 Unknown column 'sceclub_exclaim2007.EU.admins_id' in 'on clause' SELECT EL.log_actions, EL.log_date, EL.log_value, EL.log_type, EA.admins_name, EU.users_name, EU.users_matric FROM events_log EL JOIN events_users EU USING (users_id) JOIN events_admins EA USING (admins_id) ORDER BY EL.log_id DESC LIMIT 0, 20 This is based on CodeIgniter 1.7.2 and both production and development are running the same set of database. Database tables events_users: users_id users_name users_credits users_matric users_redeem events_admins: admins_id admins_email admins_name admins_pass admins_date admins_modified admins_last_login events_attendance: attendance_id users_id events_id events_events: events_id events_name events_venue events_time events_desc events_pass events_log:log_id admins_id log_actions log_date log_value users_id log_type I'm new to MySQL so I'm not aware of any difference in versions or what could be a possible cause, thank you in advance! Tried googling for MySQL4 difference to no avail too. Also tried using SELECT EL.log_actions, EL.log_date, EL.log_value, EL.log_type, EA.admins_name, EU.users_name, EU.users_matric FROM events_log EL JOIN events_users EU where EL.users_id = EU.users_id JOIN events_admins EA USING EL.admins_id = EA.admins_id ORDER BY EL.log_id DESC LIMIT 0, 10 But then I got the error in both production and development. A Database Error Occurred Error Number: 1064 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 'JOIN events_admins EA USING EL.admins_id = EA.admins_id ORDER BY' at line 8 SELECT EL.log_actions, EL.log_date, EL.log_value, EL.log_type, EA.admins_name, EU.users_name, EU.users_matric FROM events_log EL JOIN events_users EU where EL.users_id = EU.users_id JOIN events_admins EA USING EL.admins_id = EA.admins_id ORDER BY EL.log_id DESC LIMIT 0, 20 If you can point me to some resources where I can read up more on MySQL 4 syntax to achieve the same thing effect like I did with MySQL 5 syntax, please let me know. Thanks again!

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  • MySQL query returns different set of results on two identical databases

    - by 1nsane
    I exported a live MySQL database (running mysql 5.0.45) to a local copy (running mysql 5.1.33) with no errors upon import. There is a view in the database, that when executed locally, returns a different set of data than when executed remotely. It's returning 32 results instead of 63. When I execute the raw sql, the same problem occurs. I've inspected the data in all tables being joined, and the counts are the same. The query is simple and has no where conditions - but about 10 joins. Aside from the differences in mysql versions... I can't find any reason that this query would return different results between databases... since they are effectively exact copies. Has anyone experienced a problem like this before?

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  • Dependency problem with mysql-server-core-5.5

    - by Tama
    When I start the Ubuntu software centre, it says I cannot do anything until the package catalog is repaired. However, repairing fails. I ran "sudo apt-get -f install" and found the problem to be: mysql-server-5.5 depends on mysql-server-core-5.5 (= 5.5.24-0ubuntu0.12.04.1); however: Version of mysql-server-core-5.5 on system is 5.5.28-0ubuntu0.12.04.2. So, the question is, how do I install that version and resolve the dependency problem?

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  • MySQL multiple instances: can you specify a separate general_log/general_log_file option?

    - by gravyface
    Have two working MySQL instances as well as the default instance. I have general logging enabled on the default; this is working fine. On the second instance, I've added: general_log = 1 general_log_file = /path/to/log/file under [mysqld1]. Restarted the instance (using mysqladmin and confirmed it was not running with mysqld_multi report 1), started it back up again, and the only data in the log file are the connect statements from when mysqld_multi report 1 was executed. Are all the instance #1 queries just being logged to the default instance general log file? The default instance is quite busy and has identical database names, tables, etc. so it's difficult to figure out right now.

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  • Several Small, Specific, MySQL Query Cache Questions

    - by Robbie
    I've look all over the web and in the questions asked here about MySQL caching and most of them seem very non-specific about a couple of questions that I have about performance and MySQL query caching. Specifically I want answers to these questions, assume for all questions that I have the query cache enabled and it is of type 2, or "DEMAND": Is the query cache per table, per database, or per server? Meaning if I have the cache size set to X and have T tables and D databases will I be caching TX, DX, or X amount of data? If I have table T1 which I regularly use the SQL_CACHE hint on for SELECT queries and table T2 which I never do, when I query T2 with a SELECT query will it check through the cache first before performing the query? *Note: I don't want to use the SQL_NO_CACHE for all T2 queries.* Assume the same situation as in question 2. If I alter (INSERT, DELETE) table T2 will any processing be done on the cache? For answers to 2 and 3, is this processing time negligible if T2 is constantly being altered and is the target of a majority of my SELECT queries?

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  • Interview with Ronald Bradford about MySQL Connect

    - by Keith Larson
    Ronald Bradford,  an Oracle ACE Director has been busy working with  database consulting, book writing (EffectiveMySQL) while traveling and speaking around the world in support of MySQL. I was able to take some of his time to get an interview on this thoughts about theMySQL Connect conference. Keith Larson: What where your thoughts when you heard that Oracle was going to provide the community the MySQL Conference ?Ronald Bradford: Oracle has already been providing various different local community events including OTN Tech Days and  MySQL community days. These are great for local regions both in the US and abroad.  In previous years there has been an increase of content at Oracle Open World, however that benefits the Oracle community far more then the MySQL community.  It is good to see that Oracle is realizing the benefit in providing a large scale dedicated event for the MySQL community that includes speakers from the MySQL development teams, invested companies in the ecosystem and other community evangelists.I fully expect a successful event and look forward to hopefully seeing MySQL Connect at the upcoming Brazil and Japan OOW conferences and perhaps an event on the East Coast.Keith Larson: Since you are part of the content committee, what did you think of the submissions that were received during call for papers?Ronald Bradford: There was a large number of quality submissions to the number of available presentation sessions. As with the previous years as a committee member for the annual MySQL conference, there is always a large variety of common cornerstone MySQL features as well as new products and upcoming companies sharing their MySQL experiences. All of the usual major players in the ecosystem will in presenting at MySQL Connect including Facebook, Twitter, Yahoo, Continuent, Percona, Tokutek, Sphinx and Amazon to name a few.  This is ensuring the event will have a large number of quality speakers and a difficult time in choosing what to attend. Keith Larson: What sessions do you look forwarding to attending? Ronald Bradford: As with most quality conferences you can only be in one place at one time, so with multiple tracks per session it is always difficult to decide. The continued work and success with MySQL Cluster, and with a number of sessions I am sure will be popular. The features that interest me the most are around the optimizer, where there are several sessions on new features, and on the importance of backups. There are three presentations in this area to choose from.Keith Larson: Are you going to cover any of the content in your books at your MySQL Connect sessions?Ronald Bradford: I will be giving two presentations at MySQL Connect. The first will include the techniques available for creating better indexes where I will be touching on some aspects of the first Effective MySQL book on Optimizing SQL Statements.  In my second presentation from experiences of managing 500+ AWS MySQL instances, I will be touching on areas including SQL tuning, backup and recovery and scale out with replication.   These are the key topics of the initial books in the Effective MySQL series that focus on performance, scalability and business continuity.  The books however cover a far greater amount of detail then can be presented in a 1 hour session. Keith Larson: What features of MySQL 5.6 do you look forward to the most ?Ronald Bradford: I am very impressed with the optimizer trace feature. The ability to see exposed information is invaluable not just for MySQL 5.6, but to also apply information discerned for optimizing SQL statements in earlier versions of MySQL.  Not everybody understands that it is easy to deploy a MySQL 5.6 slave into an existing topology running an older version if MySQL for evaluation of many new features.  You can use the new mysqlbinlog streaming feature for duplicating master binary logs on an older version with a MySQL 5.6 slave.  The improvements in instrumentation in the Performance Schema are exciting.   However, as with my upcoming Replication Techniques in Depth title, that will be available for sale at MySQL Connect, there are numerous replication features, some long overdue with provide significant management benefits. Crash Save Slaves, Global transaction Identifiers (GTID)  and checksums just to mention a few.Keith Larson: You have been to numerous conferences, what would you recommend for people at the conference? Ronald Bradford: Make the time to meet and introduce yourself to the speakers that cover the topics that most interest you. The MySQL ecosystem has a very strong community.  The relationships you build with presenters, developers and architects in MySQL can be invaluable, however they are created over time. Get to know these people, interact with them over time.  This is the opportunity to learn more then just the content from a 1 hour session. Keith Larson: Any additional tips to handling the long hours ? Ronald Bradford: Conferences can be hard, especially with all the post event drinking.  This is a two day event and I am sure will include additional events on Friday and Saturday night so come well prepared, and leave work behind. Take the time to learn something new.   You can always catchup on sleep later. Keith Larson: Thank you so much for taking some time to do this I look forward to seeing you at the MySQL Connect conference.  Please stay tuned here for more updates on MySQL

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  • Optimizing MySQL -

    - by Josh
    I've been researching how to optimize MySQL a bit, but I still have a few questions. MySQL Primer Results http://pastie.org/private/lzjukl8wacxfjbjhge6vw Based on this, the first problem seems to be that the max_connections limit is too low. I had a similar problem with Apache initially, the max connection limit was set to 100, and the web server would frequently lock up and take an excruciatingly long time to deliver pages. Raising the connection limit to 512 fixed this issue, and I read that raising the connection limit on MySQL to match this was considered good practice. Being that MySQL has actually been "locking up" recently as well (connections have been refused entirely for a few minutes at a time at random intervals) I'm assuming this is the main cause of the issue. However, as far as table cache goes, I'm not sure what I should set this as. I've read that setting this too high can hinder performance further, so should I raise this to right around 551, 560, 600, or do something else? Lastly, as far as raising the join_buffer_size value goes, this doesn't even seem to be included in Debian's my.cnf file by default. Assuming there's not much I can do about adding indexes, should I look into raising this? Any suggested values? Any suggestions in general here would be appreciated as well. Edit: Here's the number of open tables the MySQL server is reporting. I believe this value is related to my question (Opened_tables: 22574)

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  • php mysql query strings array

    - by Chocho
    i am building a string that i check in mysql db. eg: formFields[] is an array - input1 is: string1 array_push(strings, formFields) 1st string and mysql query looks like this: "select * from my table where id in (strings)" formFields[] is an array - input2 is: string1, string2 array_push(strings, formFields) 2nd string and mysql query looks like this: "select * from my table where id in (strings)" formFields[] is an array - input3 is: string1, string2,string3 array_push(strings, formFields) 3rd string and mysql query looks like this: "select * from my table where id in (strings)" i will like to add single quotes and a comma to the array so that i have this for the array strings: "select * from my table where id in ('string1', 'string2','string3')" i tried using array implode, but still no luck any ideas? thanks

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