On Wed, Aug 31, 2022 at 12:03:06PM -0400, Reid Thompson wrote:
> Hi Hackers,
>
> Attached is a patch to
> Add tracking of backend memory allocated to pg_stat_activity
> + proargmodes =>
> '{i,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o}',
In the past, there was concern about making pg_stat_activity wider by
adding information that's less-essential than what's been there for
years. This is only an int64, so it's not "wide", but I wonder if
there's another way to expose this information? Like adding backends to
pg_get_backend_memory_contexts() , maybe with another view on top of
that ?
+ * shown allocated in pgstat_activity when the creator destroys
the
pg_stat
> + * Posix creation calls dsm_impl_posix_resize implying that
> resizing
> + * occurs or may be added in the future. As implemented
> + * dsm_impl_posix_resize utilizes fallocate or truncate,
> passing the
> + * whole new size as input, growing the allocation as needed *
> (only
> + * truncate supports shrinking). We update by replacing the *
> old
wrapping caused extraneous stars
> + * Do not allow backend_mem_allocated to go below zero. ereport if we
> + * would have. There's no need for a lock around the read here asit's
as it's
> + ereport(LOG, (errmsg("decrease reduces reported backend memory
> allocated below zero; setting reported to 0")));
errmsg() doesn't require the outside paranthesis since a couple years
ago.
> + /*
> + * Until header allocation is included in context->mem_allocated cast to
> + * slab and decrement the headerSize
add a comma before "cast" ?
--
Justin
