Thanks for your comments!
>> + * is executed, wal records aren't nomally generated (although HOT makes
>
> nomally -> normally?
Yes, fixed.
>> + * It's not enough to check the number of generated wal records, for
>> + * example the walwriter may write/sync the WAL although it doesn't
>
> You use both 'wal' and 'WAL' in the comments, but are there any intension?
No, I changed to use 'WAL' only. Although some other comments have 'wal' and
'WAL', it seems that 'WAL' is often used.
Regards,
--
Masahiro Ikeda
NTT DATA CORPORATION