public int getMaxDataCacheSize() {
        return this.maxDataCacheSize;
    }
Batch flush memory data to disk.

@param msgFileStore    the file storage
@param strBuffer       the message buffer
@throws IOException    the exception during processing
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/broker/msgstore/mem/MsgMemStore.java