cen yuhai created CARBONDATA-1655:
-------------------------------------
Summary: getSplits function is very slow !!!
Key: CARBONDATA-1655
URL: https://issues.apache.org/jira/browse/CARBONDATA-1655
Project: CarbonData
Issue Type: Bug
Components: data-query
Reporter: cen yuhai
I have a table which has 4 billion records, I find that the getSplits function
is too slow!
getSplit spent 20s!!!
{code}
"main" #1 prio=5 os_prio=0 tid=0x00007fcc94013000 nid=0x5ed5 runnable
[0x00007fcc992b6000]
java.lang.Thread.State: RUNNABLE
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getSizeInBytes(UnsafeDataMapRow.java:155)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getPosition(UnsafeDataMapRow.java:170)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getLengthInBytes(UnsafeDataMapRow.java:61)
at
org.apache.carbondata.core.indexstore.row.DataMapRow.getSizeInBytes(DataMapRow.java:80)
at
org.apache.carbondata.core.indexstore.row.DataMapRow.getTotalSizeInBytes(DataMapRow.java:70)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getSizeInBytes(UnsafeDataMapRow.java:161)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getPosition(UnsafeDataMapRow.java:170)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getRow(UnsafeDataMapRow.java:89)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getSizeInBytes(UnsafeDataMapRow.java:161)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getPosition(UnsafeDataMapRow.java:170)
at
org.apache.carbondata.core.indexstore.row.UnsafeDataMapRow.getByteArray(UnsafeDataMapRow.java:43)
at
org.apache.carbondata.core.indexstore.blockletindex.BlockletDataMap.createBlocklet(BlockletDataMap.java:310)
at
org.apache.carbondata.core.indexstore.blockletindex.BlockletDataMap.prune(BlockletDataMap.java:268)
at
org.apache.carbondata.core.datamap.TableDataMap.prune(TableDataMap.java:66)
at
org.apache.carbondata.hadoop.api.CarbonTableInputFormat.getDataBlocksOfSegment(CarbonTableInputFormat.java:524)
at
org.apache.carbondata.hadoop.api.CarbonTableInputFormat.getSplits(CarbonTableInputFormat.java:453)
at
org.apache.carbondata.hadoop.api.CarbonTableInputFormat.getSplits(CarbonTableInputFormat.java:324)
at
org.apache.carbondata.spark.rdd.CarbonScanRDD.getPartitions(CarbonScanRDD.scala:84)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:260)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:258)
at scala.Option.getOrElse(Option.scala:121)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:258)
at
org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:260)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:258)
at scala.Option.getOrElse(Option.scala:121)
```
{code}
spark-sql> select dt from dm_test.dm_trd_order_wide_carbondata limit 1;
NULL
Time taken: 20.94 seconds, Fetched 1 row(s)
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
