[jira] [Assigned] (SPARK-26001) Reduce memory copy when writing decimal
[ https://issues.apache.org/jira/browse/SPARK-26001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Apache Spark reassigned SPARK-26001: Assignee: (was: Apache Spark) > Reduce memory copy when writing decimal > --- > > Key: SPARK-26001 > URL: https://issues.apache.org/jira/browse/SPARK-26001 > Project: Spark > Issue Type: Improvement > Components: SQL >Affects Versions: 2.5.0 >Reporter: caoxuewen >Priority: Major > > this PR fix 2 here: > - when writing non-null decimals, we not zero-out all the 16 allocated bytes. > if the number of bytes needed for a decimal is greater than 8. then we not > need zero-out between 0-byte and 8-byte. The first 8-byte will be covered > when writing decimal. > - when writing null decimals, we not zero-out all the 16 allocated bytes. > BitSetMethods.set the label for null and the length of decimal to 0. when we > get the decimal, will not access the 16 byte memory value, so this is safe. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Assigned] (SPARK-26001) Reduce memory copy when writing decimal
[ https://issues.apache.org/jira/browse/SPARK-26001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Apache Spark reassigned SPARK-26001: Assignee: Apache Spark > Reduce memory copy when writing decimal > --- > > Key: SPARK-26001 > URL: https://issues.apache.org/jira/browse/SPARK-26001 > Project: Spark > Issue Type: Improvement > Components: SQL >Affects Versions: 2.5.0 >Reporter: caoxuewen >Assignee: Apache Spark >Priority: Major > > this PR fix 2 here: > - when writing non-null decimals, we not zero-out all the 16 allocated bytes. > if the number of bytes needed for a decimal is greater than 8. then we not > need zero-out between 0-byte and 8-byte. The first 8-byte will be covered > when writing decimal. > - when writing null decimals, we not zero-out all the 16 allocated bytes. > BitSetMethods.set the label for null and the length of decimal to 0. when we > get the decimal, will not access the 16 byte memory value, so this is safe. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
