Re: few more wait events to add to docs

On Wed, Mar 06, 2019 at 11:08:12AM -0800, Jeremy Schneider wrote:
> LWLock order in documentation:
> 1) CamelCase LWLocks: individually named - see lwlocknames.txt
> 2) lowercase LWLocks: tranches
> 2a) SLRUs - see SimpleLruInit() callers on doxygen
> 2b) Shared Buffer (buffer_content, buffer_io)
> 2c) Individually Named - see RegisterLWLockTranches() in lwlock.c

Hm, OK.  Perhaps I lack some user insight on the matter.  Thanks for
the feedback!  Still there are some areas where we could make the
micro-ordering better.  For example replication_slot_io and buffer_io
are I/O specific still they get in the middle of the page, still we
want buffer_content close by.

One thing that I think we could do is reorganize at least
alphabetically the section for "Lock".  Each item does not really rely
on others.  What do you think?

> If anything, I think we might just want to add comments to
> RegisterLWLockTranches() and lwlocknames.txt with links to the doc file
> that needs to be updated whenever a new tranche is added.

Yes, that would surely help.

> Not sure the best place for a comment on SLRUs (is SimpleLruInit a good
> place?)... but I'm kindof hopeful that we're not adding many more new
> SLRUs anyway and that people would bias toward leveraging the buffer
> cache when possible.

A reference at the top of SimpleLruInit() sounds good to me.
--
Michael