Knowledge Base
MySQL server runs out of memory or does not start
This article describes how to resolve a problem that may occur when you try to run MySQL server with a limited amount of memory.
You must have root access to the server to follow the procedures in this article.
Table of Contents
Problem
When you try to run MySQL server, it either runs out of memory or does not start at all.
Resolution
You can resolve this problem by reducing the amount of memory that MySQL uses. To do this, modify the my.cnf configuration file and restart the MySQL server as follows:
- Use the nano or vi text editor to open the /etc/my.cnf file.
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Make the following changes to the my.cnf file. You may need to add some of these lines, or uncomment existing lines by removing the leading #.
set-variable = max_allowed_packet=1M set-variable = thread_stack=64K set-variable = table_cache=4 set-variable = sort_buffer=64K set-variable = net_buffer_length=2K set-variable = key_buffer_size=2095104 skip-innodb skip-networking skip-bdb skip-ndbcluster
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Save the changes to the my.cnf file.
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Restart MySQL server. To do this, type the appropriate command for your Linux distribution:
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For CentOS and Fedora, type:
service mysqld restart
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For Debian and Ubuntu, type:
service mysql restart
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For CentOS and Fedora, type:
