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Object reference not set to an instance of an object - March 5, ASP. Get In Touch. LogParser supports a SQL-like syntax which can be used to do very powerful queries and reporting. Check out this website which lists 50 different queries as examples.
If you want to get the most of your IIS log files, you will want to aggregate them within a log management service. These tools can help you view and query them in real time, across all of your servers. Log management is included as one of the features of Retrace.
In this article about how to interpret IIS logs, we reviewed the format of the files, how to customize them, how to query them, and even how to aggregate them all with a log management solution. Click here to read more about the acquisition. Try Our Free Code Profiler. Try Our Code Profiler. By Role. By Technology. By Language. Documentation Support Ideas Portal Menu. Start Free Trial. IIS Manager. Log Parser Studio. Log data exported from Log Parser Studio. About the Author Latest Posts.
The logFormat attribute can be one of the following values. The default value is W3C. Value Description Custom Use a custom log file format for a custom logging module.
The numeric value is 3. Use the Microsoft IIS log file format to log information about a site. This format is handled by HTTP.
Fields are separated by commas, and time is recorded as local time. Windows status code A value of 0 indicates that the request was fulfilled successfully. Request type Target of operation Parameters the parameters that are passed to a script Not all fields will contain data.
When a field does not contain data, a hyphen - appears as a placeholder. When a field contains a non-printable character, HTTP. The numeric value is 0. The following list is a list of fields that are logged when you use the NCSA Common log file format: Remote host address Remote log name This value is always a hyphen.
User name Date, time, and UTC offset Request and protocol version Service status code A value of indicates that the request was fulfilled successfully. Bytes sent Not all fields will contain data. The numeric value is 1. Use the W3C Extended log file format to log information about a site.
Specify the fields that are logged in the logExtFileFlags attribute. The numeric value is 2. Specifies that the s-sitename field will contain either the site name false or the site ID true. If the One log file per property is set to Site the out-of-box default], then you won't get s-sitename column in the log file by default, because the log file name property will contain the site ID instead. If the One log file per property is set to Server , the-s-sitename column will be included in the log file by default.
The default value is True , meaning that the s-sitename field contains the site ID. To log the site name instead, set logSiteID to False. Optional Flags attribute. File logging stores event data in text files that you can parse to access logging data. The logTargetW3C attribute can have the following possible values. The default value is File. To process the event data, you must parse the text-based log file. Text log files take time to process and flush, so you will not be able to process the event data in real time.
Instead of logging data directly into text files, IIS will send logged information to Event Tracing for Windows, a generic event mechanism built into Windows. You can manage logged data using standard query tools, such as the Message Analyzer, or custom tools. ETW processes logged information in real time, and gives you the ability to filter and view the data, and to enable or disable logging, dynamically.
For more information, see Event Tracing. Specifies the maximum length of a line in a log file. This enables you to limit the amount of data accumulated by logging, and save on disk space, especially when you add custom logging fields. The range is 2 to 65, The default value is
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