Currently subscribe metadata size is unlimited, and it is possible to send huge subscribe txn with ~1MB metadata and consume quite a lot spaces (in terms of both RAM and disk space), and we’ve already seen people doing it. It’s probably better to limit the size of a single subscribe txn by limiting the metadata size.
Since the metadata is used to store application specific data, it’s better to discuss the appropriate metadata size limit. Welcome to vote and leave your thoughts below 
- Yes
- No
0 voters
能不能优化下，把读写速度降低下