[jira] [Created] (KAFKA-6992) Configuring the batch.size to zero won't disable the batching entirely

["Chia-Ping Tsai (JIRA)" <ji...@apache.org>]

Chia-Ping Tsai created KAFKA-6992:
-------------------------------------

             Summary: Configuring the batch.size to zero won't disable the batching entirely
                 Key: KAFKA-6992
                 URL: https://issues.apache.org/jira/browse/KAFKA-6992
             Project: Kafka
          Issue Type: Bug
          Components: documentation
            Reporter: Chia-Ping Tsai


In MAGIC_VALUE_V2, the varint is used and the estimated size won't be equal with the actual size. So it has chance to accept more records in a single produce batch.

Perhaps we should revise the docs of batch.size.
{code:java}
public static final String BATCH_SIZE_CONFIG = "batch.size";
private static final String BATCH_SIZE_DOC = "The producer will attempt to batch records together into fewer requests whenever multiple records are being sent"
                                             + " to the same partition. This helps performance on both the client and the server. This configuration controls the "
                                             + "default batch size in bytes. "
                                             + "<p>"
                                             + "No attempt will be made to batch records larger than this size. "
                                             + "<p>"
                                             + "Requests sent to brokers will contain multiple batches, one for each partition with data available to be sent. "
                                             + "<p>"
                                             + "A small batch size will make batching less common and may reduce throughput (a batch size of zero will disable "
                                             + "batching entirely). A very large batch size may use memory a bit more wastefully as we will always allocate a "
                                             + "buffer of the specified batch size in anticipation of additional records.";{code}
 

 



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