Repository: spark Updated Branches: refs/heads/master bf49c2213 -> 8948ad3fb
[SPARK-7339] [PYSPARK] PySpark shuffle spill memory sometimes are not correct In PySpark we get memory used before and after spill, then use the difference of these two value as memorySpilled, but if the before value is small than after value, then we will get a negative value, but this scenario 0 value may be more reasonable. Below is the result in HistoryServer we have tested: Index ID Attempt Status Locality Level Executor ID / Host Launch Time Duration GC Time Input Size / Records Write Time Shuffle Write Size / Records Shuffle Spill (Memory) Shuffle Spill (Disk) Errors 0 0 0 SUCCESS NODE_LOCAL 3 / vm119 2015/05/04 17:31:06 21 s 0.1 s 128.1 MB (hadoop) / 3237 70 ms 10.1 MB / 2529 0.0 B 5.7 MB 2 2 0 SUCCESS NODE_LOCAL 1 / vm118 2015/05/04 17:31:06 22 s 89 ms 128.1 MB (hadoop) / 3205 0.1 s 10.1 MB / 2529 -1048576.0 B 5.9 MB 1 1 0 SUCCESS NODE_LOCAL 2 / vm117 2015/05/04 17:31:06 22 s 0.1 s 128.1 MB (hadoop) / 3271 68 ms 10.1 MB / 2529 -1048576.0 B 5.6 MB 4 4 0 SUCCESS NODE_LOCAL 2 / vm117 2015/05/04 17:31:06 22 s 0.1 s 128.1 MB (hadoop) / 3192 51 ms 10.1 MB / 2529 -1048576.0 B 5.9 MB 3 3 0 SUCCESS NODE_LOCAL 3 / vm119 2015/05/04 17:31:06 22 s 0.1 s 128.1 MB (hadoop) / 3262 51 ms 10.1 MB / 2529 1024.0 KB 5.8 MB 5 5 0 SUCCESS NODE_LOCAL 1 / vm118 2015/05/04 17:31:06 22 s 89 ms 128.1 MB (hadoop) / 3256 93 ms 10.1 MB / 2529 -1048576.0 B 5.7 MB /cc davies Author: linweizhong <linweizh...@huawei.com> Closes #5887 from Sephiroth-Lin/spark-7339 and squashes the following commits: 9186c81 [linweizhong] Use max function to get a nonnegative value d41672b [linweizhong] Update MemoryBytesSpilled when memorySpilled > 0 Project: http://git-wip-us.apache.org/repos/asf/spark/repo Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/8948ad3f Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/8948ad3f Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/8948ad3f Branch: refs/heads/master Commit: 8948ad3fb5d5d095d3942855960d735f27d97dd5 Parents: bf49c22 Author: linweizhong <linweizh...@huawei.com> Authored: Tue May 26 08:35:39 2015 -0700 Committer: Davies Liu <dav...@databricks.com> Committed: Tue May 26 08:35:39 2015 -0700 ---------------------------------------------------------------------- python/pyspark/shuffle.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/spark/blob/8948ad3f/python/pyspark/shuffle.py ---------------------------------------------------------------------- diff --git a/python/pyspark/shuffle.py b/python/pyspark/shuffle.py index 1d0b16c..81c420c 100644 --- a/python/pyspark/shuffle.py +++ b/python/pyspark/shuffle.py @@ -362,7 +362,7 @@ class ExternalMerger(Merger): self.spills += 1 gc.collect() # release the memory as much as possible - MemoryBytesSpilled += (used_memory - get_used_memory()) << 20 + MemoryBytesSpilled += max(used_memory - get_used_memory(), 0) << 20 def items(self): """ Return all merged items as iterator """ @@ -515,7 +515,7 @@ class ExternalSorter(object): gc.collect() batch //= 2 limit = self._next_limit() - MemoryBytesSpilled += (used_memory - get_used_memory()) << 20 + MemoryBytesSpilled += max(used_memory - get_used_memory(), 0) << 20 DiskBytesSpilled += os.path.getsize(path) os.unlink(path) # data will be deleted after close @@ -630,7 +630,7 @@ class ExternalList(object): self.values = [] gc.collect() DiskBytesSpilled += self._file.tell() - pos - MemoryBytesSpilled += (used_memory - get_used_memory()) << 20 + MemoryBytesSpilled += max(used_memory - get_used_memory(), 0) << 20 class ExternalListOfList(ExternalList): @@ -794,7 +794,7 @@ class ExternalGroupBy(ExternalMerger): self.spills += 1 gc.collect() # release the memory as much as possible - MemoryBytesSpilled += (used_memory - get_used_memory()) << 20 + MemoryBytesSpilled += max(used_memory - get_used_memory(), 0) << 20 def _merged_items(self, index): size = sum(os.path.getsize(os.path.join(self._get_spill_dir(j), str(index))) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@spark.apache.org For additional commands, e-mail: commits-h...@spark.apache.org
