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ASF GitHub Bot commented on NUTCH-2501: --------------------------------------- sebastian-nagel commented on a change in pull request #279: NUTCH-2501: Take NUTCH_HEAPSIZE into account when crawling using crawl script URL: https://github.com/apache/nutch/pull/279#discussion_r164054172 ########## File path: src/bin/crawl ########## @@ -171,6 +175,8 @@ fi CRAWL_PATH="$1" LIMIT="$2" +JAVA_CHILD_HEAP_MB=`expr "$NUTCH_HEAP_MB" / "$NUM_TASKS"` Review comment: Why should the heap size depend on the number of reducers? For a large-scale crawl the reducers will run independently on different nodes, ev. also sequentially if there are not enough computing resources available. Since mapred.child.java.opts is also used for the map tasks and it's often not possible to force a fix number of map tasks, it's better to define the heap size per task (usually via mapreduce.map.java.opts and mapreduce.reduce.java.opts). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > Take into account $NUTCH_HEAPSIZE when crawling using crawl script > ------------------------------------------------------------------ > > Key: NUTCH-2501 > URL: https://issues.apache.org/jira/browse/NUTCH-2501 > Project: Nutch > Issue Type: Improvement > Reporter: Moreno Feltscher > Assignee: Lewis John McGibbney > Priority: Major > -- This message was sent by Atlassian JIRA (v7.6.3#76005)