1040 Error Too Many Connections
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Connectors More MySQL.com Downloads Developer Zone Section Menu: Documentation Home MySQL 5.5 Reference Manual Preface and Legal Notices General Information mysql too many connections Installing and Upgrading MySQL Tutorial MySQL Programs MySQL Server Administration error 1040 (hy000) too many connections mysql Security Backup and Recovery Optimization Language Structure Globalization Data Types Functions and Operators SQL Statement error sqlstate hy000 1040 too many connections Syntax The InnoDB Storage Engine Alternative Storage Engines High Availability and Scalability Replication MySQL Cluster NDB 7.2 Partitioning Stored Programs and Views INFORMATION_SCHEMA Tables MySQL operationalerror 1040 too many connections Performance Schema Connectors and APIs Extending MySQL MySQL Enterprise Edition MySQL Workbench MySQL 5.5 Frequently Asked Questions Errors, Error Codes, and Common Problems Sources of Error Information Types of Error Values Server Error Codes and Messages Client Error Codes and Messages Problems and Common Errors How to Determine What Is Causing
Mysql Too Many Connections Fix
a Problem Common Errors When Using MySQL Programs Access denied Can't connect to [local] MySQL server Lost connection to MySQL server Client does not support authentication protocol Password Fails When Entered Interactively Host 'host_name' is blocked Too many connections Out of memory MySQL server has gone away Packet Too Large Communication Errors and Aborted Connections The table is full Can't create/write to file Commands out of sync Ignoring user Table 'tbl_name' doesn't exist Can't initialize character set File Not Found and Similar Errors Table-Corruption Issues Administration-Related Issues Problems with File Permissions How to Reset the Root Password What to Do If MySQL Keeps Crashing How MySQL Handles a Full Disk Where MySQL Stores Temporary Files How to Protect or Change the MySQL Unix Socket File Time Zone Problems Query-Related Issues Case Sensitivity in String Searches Problems Using DATE Columns Problems with NULL Values Problems with Column Aliases Rollback Failure for Nontr
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Mysql Too Many Connections Solution
company Business Learn more about hiring developers or posting ads with us Database Administrators mysql error too many connections fix Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish mysql too many connections flush to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers https://dev.mysql.com/doc/refman/5.5/en/too-many-connections.html are voted up and rise to the top How to resolve too many connections and fatal error in mysql running on vps up vote 9 down vote favorite 7 I am running an application PHPlist on my linode server, simultaneously running 12 PHP scripts, each of which opens a MySQL connection. Now when I access PHPlist it often shows this error: Fatal Error: Sorry, the server is currently too busy, please try again later. http://dba.stackexchange.com/questions/20479/how-to-resolve-too-many-connections-and-fatal-error-in-mysql-running-on-vps When I am trying to access phpMyAdmin, it shows me a #1040 error. Output of my PHP scripts which run through cron jobs shows: PHP Warning: mysqli_connect(): (HY000/1040): Too many connections I am using the LAMP stack on the server with phpMyAdmin; the top output in terminal shows mysqld using 100-130% CPU. When I am trying to troubleshoot this problem I got some clues: Increase max_connection variable : I am using 200 (100 by default) Open table cache: 512 (400 by default) There are lots of variables to set but I can't determine what specific ones, I am getting some reference from: too many connections and http://dev.mysql.com/doc/refman/5.5/en/table-cache.html But according to my usage how to increase memory and what is the maximum memory difficult for me. On my server I am using around 12 PHP scripts, PHPlist application for sending emails, and a major database for user registrations. Kindly help me to resolve this problem. mysql phpmyadmin php share|improve this question edited May 14 '15 at 15:05 mustaccio 4,80411326 asked Jul 6 '12 at 6:43 Shashank 1374414 @RolandoMySQLDBA: Please Enlighten on this problem to resolve –Shashank Jul 6 '12 at 7:48 add a comment| 2 Answers 2 active oldest votes up vote 11 down vote accepted First you need to do is run this query: SELECT user,host FROM mysql
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12 Comments If you run a fairly busy and/or badly configured MySQL server, you may receive something like this when attempting to connect: XHTML # mysql ERROR 1040: Too many connections 12 # mysqlERROR 1040: Too many connections MySQL is telling you that it is handling the maximum connections that you have configured it to handle. By default, MySQL will handle 100 connections simultaneously. This is very similar to the situation when Apache reaches the MaxClients setting. You won't even be able to connect to MySQL to find out what is causing the connections to be used up, so you will be forced to restart the MySQL daemon to troubleshoot the issue. What causes MySQL to run out of connections? Here's a list of reasons that may cause MySQL to run out of available connections, listed in order of what you should check: Bad MySQL configuration Verify that you have set MySQL's buffers and caches to appropriate levels for the type of data you're storing and the types of queries that you are running. One quick way to check this information is via MySQLTuner. The script will tell you how well your server is performing along with the corrections you should make. Running the script only takes a few moments and it doesn't require a DBA to decipher the results. Data storage techniques Remember that MySQL works best when moving vertically, not horizontally. If you have a table with 20 columns, breaking it into two tables with 10 columns each will improve performance. Even if you need to join the two tables together to get your data, it will still perform at a higher level. Also, use the right data types for the right data. If you're storing an integer only, don't use a CHAR or VARCHAR data type. If your integer will be small, then use something like a TINYINT or SMALLINT rather than INT. This means MySQL will use less memory, pull less data from the disk, and have higher performing joins. Slow queries These are generally pretty easy to fix. If you have queries that don't use indexes, or if queries run slowly with indexes in place, you need to rethink how you're pulling your data. Should your data be split into multiple tables? Are you pulling more data than you need? Keep these questions in mind, enable the slow query log, and re-work your queries to find where the bottlenecks occur. Division of labor Most people who use MySQL have a dynamic site written in a scripting language, like PHP, Perl or Python. It's obvious that your server will need to do some work to parse the scripts, send data back to the client, and communicate with MySQL. If you find tha