On 2020-Apr-20, Fujii Masao wrote:
> + /*
> + * In 9.1 and 9.2 the postmaster unlinked the promote file inside the
> + * signal handler. It now leaves the file in place and lets the
> + * Startup process do the unlink.
> + */
> + if (IsPromoteSignaled() && stat(PROMOTE_SIGNAL_FILE, &stat_buf) == 0)
> {
> - /*
> - * In 9.1 and 9.2 the postmaster unlinked the promote file
> inside the
> - * signal handler. It now leaves the file in place and lets the
> - * Startup process do the unlink. This allows Startup to know
> whether
> - * it should create a full checkpoint before starting up
> (fallback
> - * mode). Fast promotion takes precedence.
> - */
It seems pointless to leave a very old comment that documents what the
code no longer does. I thikn it would be better to reword it indicating
what the code does do, ie. something like "Leave the signal file in
place; it will be removed by the startup process when ..."
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
