eG Monitoring
 

Measures reported by AzrWebsiteTest

Azure Websites is a managed cloud service that allows you to deploy a web application and make it available to your customers on the Internet in a very short amount of time. You don't directly support the VMs on which your website runs; they are managed for you. By hosting the websites through the Azure Resource Manager on the cloud, administrators can be freed from managing the physical infrastructure required to run the websites. Though the website is hosted on the Azure cloud, it is important for an administrator to constantly monitor the availability and resource utilization of the websites. The AzrWebsiteTest test helps administrators in this regard.

By constantly monitoring the website hosted through the Azure Resource Manager on the cloud, administrators can figure out the availability of the website, runtime availability of the website, erroneous websites and the websites that are over-utilizing the resources allocated to them. This way, administrators can be assured of the availability of the websites.

This test helps administrators to figure out the state of each subscription and the total number of resources allocated to each subscription, the number of geographic locations of allocated to each subscription, etc. Using this test, administrators can figure out the number of inactive resources on each subscription. This way, resources that are seldom used can be identified.

Outputs of the test : One set of results for each website hosted on the target Microsoft Azure being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Status Indicates the current state of this website.   The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Running 1
Stopped 2
Unknown 0

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current state of this website. The graph of this measure however, is represented using the numeric equivalents only - 0 to 2.

The detailed diagnosis of this measure if enabled, lists the URL that is used to hit the website, the service plan, the web space of the website and the tier of the website.

Usage_state Indicates the current availability of management information of this website.   The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Yes 1
No 0

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current availability of management information of this website. The graph of this measure however, is represented using the numeric equivalents only - 0 or 1.
site_enabled Indicates whether/not this website is enabled.   The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Enabled 0
Offline 1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether the website is enabled or not. The graph of this measure however, is represented using the numeric equivalents only - 0 or 1.
Compute_mode Indicates the compute mode of this website.   The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Limited 1
Normal 0

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the compute mode of this website. The graph of this measure however, is represented using the numeric equivalents only - 0 or 1.

Ssl_state Indicates whether/not this website is SSL-enabled.   The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
True 1
False 0

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not this website is SSL-enabled. The graph of this measure however, is represented using the numeric equivalents only - 0 or 1.
Cpu_time Indicates the amount of time the CPU was actually executing instructions for this website during the last measurement period. Secs  
Requests Indicates the total number of requests to this website during the last measurement period. Number  
Byts_rcvd Indicates the rate at which the data was received from this website during the last measurement period. Mbps  
Byts_sent Indicates the rate at which data was sent from this website during the last measurement period. Mbps  
Http2xx Indicates the number of times the HTTP requests were successful during the last measurement period. Number  
Http3xx Indicates the number of times the HTTP request were redirected to this website during the last measurement period. Number  
Http4xx Indicates the total number of HTTP client errors encountered by this website during the last measurement period. Number Ideally, the value of this measure should be zero.
Http5xx Indicates the number of HTTP server errors encountered by this website during the last measurement period. Number Ideally, the value of this measure should be zero.
Http401 Indicates the number of HTTP 401 errors i.e., unauthorized errors encountered by this website during the last measurement period. Number Ideally, the value of this measure should be zero.
Http403 Indicates the number of HTTP forbidden errors encountered by this website. Number Ideally, the value of this measure should be zero.
Http404 Indicates the number of HTTP 404 errors i.e, HTTP not found errors encountered by this website. Number Ideally, the value of this measure should be zero.
Http406 Indicates the number of HTTP 406 errors encountered by this website during the last measurement period. Number Ideally, the value of this measure should be zero.
Mem_wrkng_set Indicates the amount of physical memory required for the working set of this website. MB  
Avg_Mem_wrkng_set Indicates the average amount of memory required for the working set of this website. MB  
Avg_res_tym Indicates the average time taken by this website to respond to requests. Secs A high value for this measure indicates that the website is taking too long to respond.
Tot_res_tym Indicates the total time taken by this website to respond to requests. Secs A high value for this measure indicates that the website is taking too long to respond.
Tcp_avlblty Indicates whether the test managed to establish a TCP connection to this website. Percent Failure to establish a TCP connection may imply that either the web server process is not up, or that the process is not operating correctly. In some cases of extreme overload, the failure to establish a TCP connection may be a transient condition. As the load subsides, the server may start functioning properly again.
Tcp_con_tym Quantifies the time for establishing a TCP connection to the web server host. Secs Typically, the TCP connection establishment must be very small (of the order of a few milliseconds). Since TCP connection establishment is handled at the OS-level, rather than by the application, an increase in this value signifies a system-level bottleneck on the host that supports the web server.
Srvr_res_tym Indicates the time period between when the connection was established and when the server sent back a HTTP response header to the client. Secs While the total response time may depend on several factors, the server response time is typically, a very good indicator of a server bottleneck (e.g., because all the available server threads or processes are in use).
Cntnt_vldty Validates whether the server was successful in executing the request made to it. Percent A value of 100% indicates that the content returned by the test is valid. A value of 0% indicates that the content may not be valid. This capability for content validation is especially important for multi-tier web applications. For example, a user may not be able to login to the web site but the server may reply back with a valid HTML page where in the error message, say, “Invalid Login” is reported. In this case, the availability will be 100 % (since we got a valid HTML response). If the test is configured such that the content parameter should exclude the string “Invalid Login,” in the above scenario content validity would have a value 0.
Res_code Indicates the response code returned by the server for the simulated request. Number A value between 200 and 300 indicates a good response. A 4xx value indicates a problem with the requested content (eg., page not found). A 5xx value indicates a server error.
Cntnt_lnth Indicates the size of the content returned by the cloud. KB Typically the content length returned by the server for a specific URL should be the same across time. Any change in this metric may indicate the need for further investigation on the server side.
Data_Xfr_tym Indicates the time taken for a data transfer between the drive and the host system. Secs Data transfer time being high denotes a problem.
Ssl_validity Indicates the number of days from the current day for which the SSL certificate of this web app will be valid. Number A low value for this measure implies that the SSL certificate is about to expire. You may want to renew the certificate or deploy a new SSL certificate to ensure continued accessibility of the web app.