!156 Fix MOT replay in async commit mode

Merge pull request !156 from Vinoth/master

src/gausskernel/storage/mot/core/src/mot.conf

@@ -13,7 +13,7 @@
 # you need to reload the server.
 #
 # This file is read ONLY on server startup. If you edit the file on a running system,
-# you have reload the server for the changes to take effect.
+# you have to reload the server for the changes to take effect.
 #
 # Memory units:  KB = kilobytes
 #                MB = megabytes

src/gausskernel/storage/mot/core/src/system/transaction_logger/asynchronous_redo_log/asynchronous_redo_log_handler.cpp

@@ -74,6 +74,7 @@ RedoLogBuffer* AsyncRedoLogHandler::CreateBuffer()
 
 void AsyncRedoLogHandler::DestroyBuffer(RedoLogBuffer* buffer)
 {
+    buffer->Reset();
     m_bufferPool.Free(buffer);
 }
 
@@ -131,6 +132,7 @@ bool AsyncRedoLogHandler::TrySwitchBuffers(int index)
 void AsyncRedoLogHandler::FreeBuffers(RedoLogBufferArray& bufferArray)
 {
     for (uint32_t i = 0; i < bufferArray.Size(); i++) {
+        bufferArray[i]->Reset();
         m_bufferPool.Free(bufferArray[i]);
     }
 }

src/gausskernel/storage/mot/core/src/system/transaction_logger/redo_log.cpp

@@ -56,6 +56,7 @@ bool RedoLog::Init()
         }
         if (m_redoBuffer == nullptr)
             return false;
+        ResetBuffer();
     }
     return true;
 }

src/gausskernel/storage/mot/core/src/system/transaction_logger/redo_log_buffer.h

@@ -336,7 +336,7 @@ public:
     }
 
 private:
-    /** @var Next write offset. */
+    /** @var Buffer size. */
     uint32_t m_bufferSize;
 
     /** @var Next write offset. */