COGNOS Business Intelligence Series 7

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Appendix A: Context Help Process Control Dimension Line in CSV Export Specifies whether the dimension line information is included when a user exports a Comma Separated Value file (.csv) from the Web. Secure Temp Files Specifies that temporary files are encrypted. Connection Timeout (min) Sets the number of minutes a user's connection to cubes remains active between Client/server requests. This timeout is particularly important for connections to Access Manager-protected cubes. When the connection times out, the user must re-enter the authentication information to continue browsing the cube. Connection Timeout does not apply to connections to the server via PowerPlay for Windows because of the Common Logon Server. This setting may be shorter than that configured in the Access Manager Server. Minimum Processes Sets the minimum number of processes that remain running once they open. Maximum Processes Sets the maximum number of processes that can be open at the same time. Report Timeout Sets the maximum length of time that the report processor keeps a document open. Request Timeout (s) Sets the maximum length of time that the server spends processing requests. If the requests are not processed within the set time, users receive a message asking them to try again. Idle Process Timeout (min) Sets the number of minutes a process remains active between requests. When a process times out, the memory it used becomes available to the server. The Minimum Processes setting prevents all of the processes from shutting down. Recycle Time (min) Specifies the maximum amount of time a ppdesweb or pprp process is allowed to run before being retired. You can lower the default value if these processes consume too many resources. The default value is 1440 (24 hours). To disable the recycle time setting, set the value to 0 (zero). Scheduling Threshold Sets the queuing algorithm that decides to which server process the dispatcher will pass an incoming Client request. For each cube, you configure a maximum number of processes in PowerPlay Enterprise Server. Each of these processes can handle one request at a time. If more requests are received from PowerPlay Windows applications than there are processes, queuing occurs. PowerPlay Enterprise Server maintains one queue for each server process. The dispatcher then routes incoming requests to a server process based on the Scheduling Threshold parameter. There are three algorithms to control the routing of incoming requests: • A value of 10 means each request is submitted to the next server process in a round-robin fashion, regardless of the length of the current queue. 88 Cognos PowerPlay (R)
Appendix A: Context Help If most incoming requests are similar in duration, choose this algorithm to minimize time and CPU cycles. • A value of 0 means each request is submitted to the process with the shortest queue. If incoming requests vary in duration, choose this algorithm for better performance. • A value from 1 to 9 means each request is submitted to the process with the best queuing percentage. This algorithm polls each server process to determine the processing time taken for the current request and the amount of time queued requests have been waiting. The queuing percentage is calculated as wait time/process time for the current request, expressed as a percentage. The incoming request is then directed to the first process whose queuing percentage is less than 10 times the threshold value. For example, a scheduling threshold value of 5 means that the request is passed to the first process whose queuing percentage is less than 50%. Under heavy load conditions, this algorithm is the most effective. It reduces wait time, but at the cost of lower overall throughput. To use this algorithm effectively, decrease its value to reduce the number of processes polled before one is selected. Local Process Threshold Sets the threshold at which requests are queued to be processed locally rather than forwarded to a mirror reference. When both a source and a mirror reference exist for a cube or report, the server chooses local (source) processing. If no local processes are available, requests can be queued up to the threshold set (provided the Maximum Processes limit has been reached). The default setting of 0 means requests are never queued. They are immediately forwarded to the mirror reference. Read Cache Size (mb) Sets the amount of disc space used for the read cache for the cube. If your system has sufficient resources, increasing the read cache size may improve performance. The default value is 0, which sets the read cache size to use the default server settings. The default server settings are 8mb for Windows, and 16mb for UNIX. Publishing Publish to a Table of Contents Lists the cube or report for Web users in the Table of Contents. By default, all data is published. You may want to prevent some cubes or reports from being listed in the Table of Contents. For example, some cubes can be made available only for drill-through access from another cube, or, some reports may be added for testing purposes. Note: You can also disable the entire Table of Contents (p. 53). Publish to Portal Lists the cube or report for Web users in the portal (Upfront or Cognos Connection). Upfront Server Group Specifies the name of the Upfront server group (Upfront Server Group by default). The name is retrieved from the server configuration file when you connect to a server in the PowerPlay Enterprise - Server Administration tool. The Upfront Server group specifies a URL to the Upfront gateway program such as http://portal/cognos/cgi-bin/upfcgi.exe. It also specifies a list of server name and port number combinations available to handle publishing requests. The gateway program communicates with the first server in the list, the primary processor. If this server should become unavailable, the gateway program communicates with the next server in the list, providing continuous service. Enterprise Server Guide 89
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