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17 lines
978 B
Markdown
17 lines
978 B
Markdown
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# Memcached
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LibreNMS can store SQL results in memcached to achieve performance advantages of in-memory value storage and removing work load for frequent queries off the MySQL backend.
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To enable memcached in your install you need to have `memcached` installed and the PHP extension `php5-memcached` or `php-memcached` and add the following lines to your `config.php`:
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```php
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$config['memcached']['enable'] = true;
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$config['memcached']['host'] = "localhost";
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$config['memcached']['port'] = 11211;
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```
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By default values are kept for 4 Minutes inside the memcached, you can adjust this retention time by modifying the `$config['memcached']['ttl']` value to any desired amount of seconds.
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It's strongly discouraged to set this above `300` (5 Minutes) to avoid interferences with the polling, discovery and alerting processes.
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If you use the Distributed Poller, you can point this to the same memcached instance. However a local memcached will perform better in any case.
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