The test case `test_space_write_buffer_size_rocks` often fails

[ShiKaiWi]

Describe this problem

The test case test_space_write_buffer_size_rocks often fails.

Server version

46bf739adb89b6e6947f5f29df71c2e865ae532a

Steps to reproduce

Under the source root directory, execute the command make test multiple times and the test mentioned in the title may fail.

Expected behavior

All the tests always pass.

Additional Information

No response