ATG Search - search engine tuning settings

In this blog, I am going to list the best tuning settings for ATG Search engine.

The AESoapConfig.xml, AESoapWaspConfig.xml and AEConfig.xml are the xmls referred below and you can find it @ <ATG_DIR>\<Searchx.x>\SearchEngine\<operating_system>\bin\ folder.

(1) Make sure that the AESoapConfig.xml's rwTimeout is less than or equal to routing's readTimeoutMs. You could find the routing's readTimeoutMs @ atg\search\routing\SearchEngineService component.

rwTimeout is the length of time in seconds to wait before a read or write operation times out on an active connection. The number can be decreased to improve performance. However, a value that is too low could cause slow connections to be prematurely closed.

(2) Adjust the number of engine threads to match the number of CPUs available to the engine. Note that the minimal value for maxThreads and maxSpareThreads is 2, which applies to running with 1 CPU. However, it is recommended to run with more than one CPU.
a) Set MaxThreads in AEConfig.xml to number of CPU's
b) Set maxSpareThreads in AESoapWaspConfig.xml to number of CPU's

maxThreads is the number of requests you can process simultaneously, and this generally should be the number of CPU's available to the engine. If this is higher than the CPUs, the engine will bog down, with slower response times.
maxSpareThreads is the number of worker threads to process requests simultaneously, generally this should be the same as MaxThreads.

(3) Disable the the keep-alive/connection reuse setting
a) Set reuseCount=0

reuseCount is the number of requests that may be accepted using the same connection. The number can be increased to reduce the frequency of opening new connections and improve performance. However, a value that is too high could prevent new connections from being accepted. A value of 0 disables connection reuse. This applies to HTTP 1.1 only.

Comments

ATG Search Indexing - overview of different steps in search indexing

Read more about the search indexing behind the scene steps @ http://tips4ufromsony.blogspot.in/2011/12/atg-search-indexing-behind-scene-steps.html ATG Search prepares searchable content by indexing the products specified in the XML definition file (/atg/commerce/search/ProductCatalogOutputConfig). Generally there are two types of indexing 1. Full Indexing --> all data taken for indexing 2. Incremental Indexing --> only changed data will be taken for indexing When full indexing is triggered, following happens: 1. The out of box component BulkLoader will call IndexedItemsGroup.getGroupMembers() to load the products to the XHTL document. It prevents uncategorized products from getting indexed. The definition file format begins with a top-level item as a product and includes the properties of parent category and childskus. For each product, the set of Variant Producers configured in ProductCatalogOutputConfig is execute...

ATG Product Catalog schema ER diagram

Check out the O rder schema ER-Diagram @ http://tips4ufromsony.blogspot.in/2012/02/atg-order-schema-er-diagram.html Check out the User Profile schema ER-Diagram @ http://tips4ufromsony.blogspot.in/2012/03/atg-user-profile-schema-er-diagram.html If you would like to know the relationship between different Product Catalog tables, please find below screen shots of Product Catalog schema ER Diagrams.

Eclipse plug-in to create Class and Sequence diagrams

ModelGoon is an Eclipse plug-in avaiable for UML diagram generation from Java code. It can be used to generate Package Dependencies Diagram, Class Diagram, Interaction Diagram and Sequence Diagram. You coud get it from http://marketplace.eclipse.org/content/modelgoon-uml4java Read more about it and see some vedios about how to create the class and sequence diagram @ http://www.modelgoon.org/?tag=eclipse-plugin Find some snapshots below which gives an idea about the diagram generation.

ATG - basic concepts of ATG

This blog is for the ATG beginners to get some basic overview about ATG. I just given the ATG concepts as a list of numbered points for the ease of understanding. 1. At the framework level, ATG is a java based application platform for hosting web-based applications, as well as RMI accessible business components, with an ORM layer, a component container, an MVC framework, and a set of tag libraries for JSP. 2. Art Technology Group(ATG)'s Dynamo Application Server (DAS) is a Java EE compliant application server. DAS is no longer actively developed as ATG recommends using other Java EE applications servers for its products such as BEA WebLogic, JBoss or IBM WebSphere. 3. Prior to ATG 2007, JHTML was used instead of JSP for view purpose. J...

ATG search and Monitoring the request and response

To get an idea of the SearchEngineActivity logs, please read the blog : http://tips4ufromsony.blogspot.com/2012/01/atg-search-and-search-engine-activity.html Other than using the SearchEngineActivity logs, we could monitor the search engine request/reponse by enabling the monitoring in the SearchEngineService component @ /dyn/admin/nucleus/atg/search/routing/SearchEngineService. Once you enable this "monitoringEnabled", each request/response and the response time like last response time and average response time can be found @ SearchEngineService component. After you send a request to the search engine, just refresh the SearchEngineService component and you could see that the total command count will be incremented by one and the response time also get updated. If you click this total command count, a new window will be opened with the request and response details.

Tips from Sony Thomas

Search This Blog