MySQL Bugs: #115982: The replication thread accumulates in get_default_db

Bug #115982	The replication thread accumulates in get_default_db_collation, causing delays
Submitted:	2 Sep 2024 13:41	Modified:	5 Sep 2024 2:36
Reporter:	xilin Chen	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Replication	Severity:	S3 (Non-critical)
Version:	8.0.39	OS:	Any
Assigned to:		CPU Architecture:	Any

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File:	Maximum allowed size is 50MB.
Description:
Privacy:

If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.

To split a large file:

On *nix platforms use the split command e.g. split -b 50MB <my_large_archive> <my_split_archive_prefix>
On windows use WinZip or a similar utility to split the large file

Flamgraph showing 10% of time used by get_default_db_collation when using rewrite_db

Attachment: get_default_db_collation_flamegraph.svg (image/svg+xml, text), 1.67 MiB.