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  • Category: Databases - 1-6

[SOLVED] ERROR 1206 (HY000): The total number of locks exceeds the lock table size

Dec 31, 1969 | By Webtraffic Exchange | Databases | 0 Comments
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We have a customized Openbravo POS v2.2 running with a dozen workstations operating 24x7 a year around. The size of the database has grown to 10GB, and the performance started to degrade so we decided to archive old data and start ...]
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[SOLVED] MySQL Crash with Fatal error: cannot allocate memory for the buffer pool

Dec 31, 1969 | By Webtraffic Exchange | SQL , Databases | 0 Comments
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We have a dozen websites mostly running WordPress, and one Drupal website on Digital Ocean with a 1GB instance. The server was running flawlessly for 6 months, and then MySQL starts to crash every few days unexpectedly with the fol...]
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MySQL Character Set and Collation

Dec 31, 1969 | By Webtraffic Exchange | SQL , Databases | 0 Comments
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MySQL documentation states the following with respect to the "character set" and "collation" of the data storage in the database.
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How to change primary key values in MySQL?

Dec 31, 1969 | By Webtraffic Exchange | Databases | 0 Comments
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To change values of existing integer field (`table` is the table name, and "id" is the column name), you may use the following update SQL command:
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How to change MySQL user and root password?

Dec 31, 1969 | By Webtraffic Exchange | Databases | 0 Comments
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We have been using the DirectAdmin control panel for a number of years, and each time we set up a server it is necessary to change the root password. By default, Direct Admin creates a MySql superuser called "da_admin" with a preas...]
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What is the difference between "Primary Key" and "Unique Key" in SQL?

Dec 31, 1969 | By Webtraffic Exchange | SQL , Databases | 0 Comments
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I've had a chance to with a Postgres database and came across a table with two primary keys. This intrigues me to look up a definition of primary and unique key. I always thought there would only be one primary key in a table, and ...]
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