TCP RTT plugin
This plugin collects and displays the average TCP Round Trip Time for a host.
Prerequisites
Meter 4.5.0-778 or later must be installed.
The CPU Core plugin supports the following Operating Systems.
| Linux |  |
| OS X | |
To install the plugin
- From the top right of the screen, perform one of the following actions:
Click
> Data Collection, select the TrueSight meter, and select the Sources tab.- Click > Configure Sources.
- Use the search box or scroll through the page to find the source system which has the TrueSight meter on which you want to install the plugin.
- Click the name of the source to view source details.
- Select the Plugins tab.
- Use the search box or scroll through the page to find the plugin you want to install.
Click + Install to start the installation.
Refer to the following sections for the configuration details required to collect data and view the list of plugin metrics.
Enabling the TCP timestamp on your computer
In order to provide the TCP round trip time metric, the optional TCP timestamp settings must be enabled on the target computer. Depending on the Operating System, it may or may not be enabled by default. The table below shows the supported Operating Systems and the command used to enable the flag.
| Operating System | Enable Command | Default setting |
|---|---|---|
| OS/X 10.8 to 10.10 | sudo sysctl net.inet.tcp.rfc1323=1 | Enabled |
| OS/X 10.11 | Unknown - feature was removed | Unknown |
| Ubuntu | echo 1 > /proc/sys/net/ipv4/tcp_timestamps | Enabled |
| CentOS | echo 1 > /proc/sys/net/ipv4/tcp_timestamps | Enabled |
| FreeBSD | sudo sysctl net.inet.tcp.rfc1323=1 | Enabled |
| Ubuntu | echo 1 > /proc/sys/net/ipv4/tcp_timestamps | Enabled |
| ArchLinux | echo 1 > /proc/sys/net/ipv4/tcp_timestamps | Enabled |
| OpenSuse | echo 1 > /proc/sys/net/ipv4/tcp_timestamps | Enabled |
| Alpine | echo 1 > /proc/sys/net/ipv4/tcp_timestamps | Enabled |
To install the plugin
- From the top right of the screen, perform one of the following actions:
Click
> Data Collection, select the TrueSight meter, and select the Sources tab.- Click > Configure Sources.
- Use the search box or scroll through the page to find the source system which has the TrueSight meter on which you want to install the plugin.
- Click the name of the source to view source details.
- Select the Plugins tab.
- Use the search box or scroll through the page to find the plugin you want to install.
Click + Install to start the installation.
Refer to the following sections for the configuration details required to collect data and view the list of plugin metrics.
Configuration details
| Field Name | Description |
|---|---|
| Source | The source to display in the legend. The host name of the computer is displayed if you do not specify a value. |
| Polling Interval | The frequency at which the metrics are collected from the computer. |
Plugin metrics
| Metric Name | Description |
|---|---|
| TCP RTT | TCP round trip time |
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