long count = readCount.incrementAndGet();
LogManager.logDetail(LogConstants.CTX_BUFFER_MGR, batchManager.id, id, "reading batch from disk, total reads:", count); //$NON-NLS-1$
try {
this.batchManager.compactionLock.readLock().lock();
long[] info = batchManager.physicalMapping.get(this.id);
ObjectInputStream ois = new ObjectInputStream(new BufferedInputStream(batchManager.store.createInputStream(info[0]), IO_BUFFER_SIZE));
batch = new TupleBatch();
batch.setDataTypes(types);
batch.readExternal(ois);
batch.setRowOffset(this.beginRow);
batch.setDataTypes(null);