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Added performance doc + updated install docs
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laf
@@ -153,6 +153,14 @@ That's it! You now should be able to log in to http://librenms.example.com/. P
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We now suggest that you add localhost as your first device from within the WebUI.
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#### What next?
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Now that you've installed LibreNMS, we'd suggest that you have a read of a few other docs to get you going:
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- (Performance tuning)[http://docs.librenms.org/Support/Performance]
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- (Alerting)[http://docs.librenms.org/Extensions/Alerting/]
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- (Device Groups)[http://docs.librenms.org/Extensions/Device-Groups/]
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#### Closing
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We hope you enjoy using LibreNMS. If you do, it would be great if you would consider opting into the stats system we have, please see [this page](http://docs.librenms.org/General/Callback-Stats-and-Privacy/) on what it is and how to enable it.
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@@ -164,6 +164,14 @@ That's it! You now should be able to log in to http://librenms.example.com/. P
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We now suggest that you add localhost as your first device from within the WebUI.
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#### What next?
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Now that you've installed LibreNMS, we'd suggest that you have a read of a few other docs to get you going:
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- (Performance tuning)[http://docs.librenms.org/Support/Performance]
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- (Alerting)[http://docs.librenms.org/Extensions/Alerting/]
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- (Device Groups)[http://docs.librenms.org/Extensions/Device-Groups/]
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#### Closing
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We hope you enjoy using LibreNMS. If you do, it would be great if you would consider opting into the stats system we have, please see [this page](http://docs.librenms.org/General/Callback-Stats-and-Privacy/) on what it is and how to enable it.
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@@ -135,6 +135,14 @@ That's it! You now should be able to log in to http://librenms.example.com/. P
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We now suggest that you add localhost as your first device from within the WebUI.
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#### What next?
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Now that you've installed LibreNMS, we'd suggest that you have a read of a few other docs to get you going:
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- (Performance tuning)[http://docs.librenms.org/Support/Performance]
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- (Alerting)[http://docs.librenms.org/Extensions/Alerting/]
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- (Device Groups)[http://docs.librenms.org/Extensions/Device-Groups/]
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#### Closing
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We hope you enjoy using LibreNMS. If you do, it would be great if you would consider opting into the stats system we have, please see [this page](http://docs.librenms.org/General/Callback-Stats-and-Privacy/) on what it is and how to enable it.
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@@ -138,6 +138,14 @@ That's it! You now should be able to log in to http://librenms.example.com/. P
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We now suggest that you add localhost as your first device from within the WebUI.
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#### What next?
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Now that you've installed LibreNMS, we'd suggest that you have a read of a few other docs to get you going:
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- (Performance tuning)[http://docs.librenms.org/Support/Performance]
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- (Alerting)[http://docs.librenms.org/Extensions/Alerting/]
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- (Device Groups)[http://docs.librenms.org/Extensions/Device-Groups/]
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#### Closing
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We hope you enjoy using LibreNMS. If you do, it would be great if you would consider opting into the stats system we have, please see [this page](http://docs.librenms.org/General/Callback-Stats-and-Privacy/) on what it is and how to enable it.
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@@ -0,0 +1,50 @@
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# Performance optimisations
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This document will give you some guidance on optimising your setup.
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The suggestions are in a rough order of how much impact they will have.
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#### RRDCached
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We absolutely recommend running this, it will save on IO load. [RRDCached](http://docs.librenms.org/Extensions/RRDCached/)
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#### MySQL Optimisation
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It's advisable after 24 hours of running MySQL that you run (MySQL Tuner)[https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl]
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which will make suggestions on things you can change specific to your setup.
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One recommendation we can make is that you set the following in my.cnf:
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```bash
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innodb_flush_log_at_trx_commit = 0
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```
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You can also set this to 2. This will have the possibility that you could lose upto 1 second on mysql data in the event
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MySQL crashes or your server does but it provides an amazing difference in IO use.
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#### Polling modules
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Disable polling (and discovery) modules that you do not need. You can do this globally in `config.php` like:
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Disable OSPF polling
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```php
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$config['poller_modules']['ospf'] = 0;
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```
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You can disable modules globally then re-enable the module per device or the opposite way. For a list of modules please see
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[Poller modules](http://docs.librenms.org/Support/Poller%20Support/)
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#### Optimise poller-wrapper
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The default 16 threads that `poller-wrapper.py` runs as isn't necessarily the optimal number. A general rule of thumb is
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2 threads per core but we suggest that you play around with lowering / increasing the number until you get the optimal value.
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#### Recursive DNS
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If your install uses hostnames for devices and you have quite a lot then it's advisable to setup a local recursive dns instance on the
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LibreNMS server. Something like pdns-recursor can be used and then configure `/etc/resolv.conf` to use 127.0.0.1 for queries.
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