Setting Always On logging
This section contains the following topics:
Introduction to the Always On Logging option
Historically, if you experienced a BMC Remedy AR System server failure, BMC would request you to enable logging and then wait for the problem to re-occur so that the data could be collected and then an analysis could be performed.
Now, the Always On Logging option helps you to reduce, and in some cases, eliminate the need to enable logging. This option allows BMC to immediately perform an analysis and in some cases, provide a root cause of the failure without having you to enable the logging and wait for the problem to reoccur. The Always On Logging option helps you identify the root cause of issues faster and also helps in improving the support for BMC Remedy AR System server.
Enabling the Always On Logging feature logs several types of information. To understand the different types of log information, see Types of logs. For BMC AR System server, the Always On Logging option is enabled by default and is initiated when BMC Remedy AR System server starts. You can manually enable or disable the option, if required.
- For some instances, you may still have to generate additional log files.
- Always On Logging option may utilize 5% to 10% excess CPU depending on the usage of the system. If CPU utilization is around 90%, consider adding extra CPU capacity.
- The size of the allocated buffer impacts heap available for rest of the process. If you want to increase the buffer size while Always On Logging is enabled, increase the maximum heap size by the same amount. The usage of heap memory might increase temporarily. However, the heap size will reset to the original usage after garbage collector reclaims the unused memory.
Starting with Service Pack 1, you can enable the Always On Logging option from an user interface.
Configuring Always On Logging option for BMC AR System server
Follow the steps given below to configure the Always On Logging option for BMC AR System server:
- In a browser, open the AR System Administration Console, and click System > General > Server Information.
The AR System Administration: Server Information form appears.
- Click the Always On Logging tab.
AR System Administration: Server Information form - Always On Logging tab
(Click the image to enalrge it.)
In the Always On Logging tab, specify the desired values for the given fields:
In the File Name field, enter the log file name along with the location path.
In the BufferSize (byte) field, enter the log size (in bytes). The default file size is 5MB.
If you configure the size to 0 MB, the Always On Logging option gets disabled.
In the Errors Triggering Log field, enter the required error code . You can enter multiple error codes separated by a semicolon. The log file will record all the information related to the specified error codes. For more information on error codes, see BMC Remedy AR System error messages.
In the Maximum Backups field, enter the number of backup files that you need to store.
- Click Apply.
- Click Ok.
You can use the Save to File button to generate logs as and when desired. You need not wait for an error to occur and a log file to be generated. The Save to File button can be safely used to monitor the progress/performance of BMC AR System server.
The Always On Logging option ensures the following:
- A minimum set of logs is always available either on-demand or at the time of an issue like a server or an operation failure.
- If you have not enabled the server-side logging and the BMC Remedy AR System server failure occurs or any other server related issues occur, the Always On Logging option provides a snapshot of the most recent activity in the server. This snapshot is saved into a file for review and analysis.
- In a server group environment, ARGetServerInfo (GSI) having the operation number 430 saves the logging information for all the servers in the group. The logging information is saved for the server, its plug in server contents, and the thread stack traces of all the processes associated with the respective server.
- If the BMC Remedy AR System server failure occurs, it automatically takes a snapshot. Alternatively, you can also manually trigger a snapshot for other events.
- The Maintenance Utility Log Zipper also collects these logs. You can dump the log file and use the Log Zipper to send a single zip file.
- The BMC Remedy AR System server automatically runs the Always On Logging option. Logging information using this option is independent of the existing logging.
- The Always On Logging option does not save the log file information for ordinary shutdown options like arsystem stop or a Microsoft Windows stop service.
- You must collect the logging information from the BMC Remedy AR System server’s \db directory, as the log file does not have a View button.
When you enable the Always On Logging option, the logging information is saved on the following conditions:
- On Demand: You can choose when to save the log information as required. This is applicable to server group environments as well.
- On Error condition: This option checks if the error exists in the configured error list and only then save the buffer content in a log file. In a server group environment, logging information is saved on the server on which the error occurred.
Size of the Always On Logging option log file
Always On Logging option allows you to configure the log file size. The log file size is configured using the BufferSize parameter. The default size of the log file is 5 MB.
The size of the log file will not be same as the specified buffer size. The actual size of the generated log file will be approximately half the size of the specified buffer size. For example, if you specify the buffer size as 5MB, the log file generated will be roughly around 2.5MB.
To enable Always On Logging for plug-in server, see Setting plug-in server options.