Rate limit compactions with a 25ms pause after each complete file.

JoelKatz · JoelKatz · commit 5bbb54456a53 · 2013-06-19T09:41:16.000-07:00
diff --git a/db/db_impl.cc b/db/db_impl.cc
@@ -813,6 +813,10 @@ Status DBImpl::FinishCompactionOutputFile(CompactionState* compact,
           (unsigned long long) output_number,
           (unsigned long long) current_entries,
           (unsigned long long) current_bytes);
+
+      // rate-limit compaction file creation
+      // with a 25ms pause
+      env_->SleepForMicroseconds(25000);
     }
   }
   return s;

Original file line number	Diff line number	Diff line change
`@@ -813,6 +813,10 @@ Status DBImpl::FinishCompactionOutputFile(CompactionState* compact,`
`813`	`813`	`(unsigned long long) output_number,`
`814`	`814`	`(unsigned long long) current_entries,`
`815`	`815`	`(unsigned long long) current_bytes);`
	`816`	`+`
	`817`	`+ // rate-limit compaction file creation`
	`818`	`+ // with a 25ms pause`
	`819`	`+ env_->SleepForMicroseconds(25000);`
`816`	`820`	`}`
`817`	`821`	`}`
`818`	`822`	`return s;`