[GitHub] [rocketmq] shengminw commented on issue #4520: [Optimization] Implenment adjusting maxMessageSize dynamicly

[GitBox <gi...@apache.org>]

shengminw commented on issue #4520:
URL: https://github.com/apache/rocketmq/issues/4520#issuecomment-1168150403

   @lizhiboo 
   Yes, maxMessageSize can been set before usage in the MessageStoreConfig. And the default maxMessageSize is 4 * 1024 * 1024. 
   Except for setting paramaters before usage, RMQ also provide some tools to update MessageStoreConfig during broker is running. For exmaple, when we want to send a message is 5 * 1024 * 1024, we can use "mqadmin updateBrokerConifig -b *** -k maxMessageSize -v 5 * 1024 * 1024" to update broker config.
   However, just modify the MessageStoreConfig cannot tanke effect, because the buffer used for encoding in CommitLog has been initialized.


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