You can install the optional LeanSentry Agent on one or more servers being monitored for deeper diagnostics.
The LeanSentry Monitoring service is the primary monitoring component that collects data in your environment. It can be installed on each server being monitored when using the Local deployment mode, or on a separate server/VM in your environment when using the Remote deployment mode.
In both deployment models, the LeanSentry Monitoring service collects all basic monitoring information necessary to track the health and performance of your environment.
NOTE: When you install LeanSentry on each server using the Local deployment model, the LeanSentry Agent is automatically installed..
What functionality does the LeanSentry Agent add?
The Agent is a separate service that adds advanced diagnostic functionality to the LeanSentry Monitoring service. This functionality includes:
1. CPU profiling, including functions that consumed CPU in your web applications.
2. Detailed request traces.
3. Slow IIS module, SQL query, and outbound HTTP request tracking.
Do I have to install the LeanSentry Agent on every server?
No. You can chose to install the LeanSentry Agent on none of your servers, several of your servers, or all servers.
If you have multiple servers that host the same application, installing the Agent on just one of those servers if often enough to capture diagnostic information needed to diagnose problems on all of the servers.
You can add, remove, or stop the LeanSentry Agent anytime without affecting the overall monitoring of your servers. If the Agent is stopped, it will temporarily cease providing the advanced diagnostic data for the specific server until it is re-enabled.
What overhead does the LeanSentry Agent have?
Because the LeanSentry Agent is installed on your production servers, it can sometimes create a slightly higher overhead on your servers than if using the LeanSentry Monitoring service only. This overhead is minimal in most cases and is well justified by the additional diagnostic power the agent provides.
The LeanSentry Agent uses automatic throttling to reduce its resource usage if it begins to consume more resources, and even shut itself down in the case of exceeding resource usage limits (25% CPU, 500Mb RAM).
How do I install the LeanSentry Agent?
Log into your dashboard, and follow the suggestion at the top of each page to install the Agent:
NOTE: When you install LeanSentry on each server using the Local deployment model, the LeanSentry Agent is automatically installed.
You can also always install the Agent by opening your environment configuration page:
How do I stop or remove the LeanSentry Agent?
To stop the LeanSentry Agent service, use the following command from a command line prompt started with the "Run As Administrator" option:
> sc stop SentinelAgentSvc
To start the LeanSentry Agent back up:
> sc start SentinelAgentSvc
To completely remove the LeanSentry Agent, go to "Add Remove Programs" and uninstall the "LeanSentry Agent Service":
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