config: support to dynamically update some config items read from PD #14393
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qw4990
added
status/WIP
require-LGT3
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This PR is too hard to solve these conflicts, so a new PR(#14750) is created to replace this PR. |
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What problem does this PR solve?
Part II to implement this proposal: #13660.
Wait for #14303.
In this PR, we refine some code about configs and support to dynamically update some configs items read from PD.
What is changed and how it works?
1.1. remove the feature of hot-reloading configs according to HTTP;
1.2. forbid to update some config items according to SQL like
set @key=valCheck List
Tests