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Make levels 1-based in pg_log_backend_memory_contexts()

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Both pg_get_process_memory_contexts() and pg_backend_memory_contexts
have 1-based levels, whereas pg_log_backend_memory_contexts() was using
0-based levels.  Align these.

This results in slightly saner behavior from MemoryContextStatsDetail()
in regards to the max_level.  Previously it would stop at 1 level before
the maximum requested level rather than at that level.

Reported-by: Atsushi Torikoshi <torikoshia@oss.nttdata.com>
Author: Atsushi Torikoshi <torikoshia@oss.nttdata.com>
Author: David Rowley <drowleyml@gmail.com
Reviewed-by: Melih Mutlu <m.melihmutlu@gmail.com>
Reviewed-by: Rahila Syed <rahilasyed90@gmail.com>
Discussion: https://postgr.es/m/395ea5d4fe190480efa95bf533485c70@oss.nttdata.com
This commit is contained in:
David Rowley 2025-04-18 09:04:28 +12:00
parent fc5e966f73
commit d9e03864b6
1 changed files with 5 additions and 6 deletions
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11
src/backend/utils/mmgr/mcxt.c
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@ -873,7 +873,7 @@ MemoryContextStatsDetail(MemoryContext context,
print_location = PRINT_STATS_TO_LOGS;
/* num_contexts report number of contexts aggregated in the output */
MemoryContextStatsInternal(context, 0, max_level, max_children,
MemoryContextStatsInternal(context, 1, max_level, max_children,
&grand_totals, print_location, &num_contexts);
if (print_to_stderr)
@ -968,7 +968,7 @@ MemoryContextStatsInternal(MemoryContext context, int level,
*/
child = context->firstchild;
ichild = 0;
if (level < max_level && !stack_is_too_deep())
if (level <= max_level && !stack_is_too_deep())
{
for (; child != NULL && ichild < max_children;
child = child->nextchild, ichild++)
@ -1003,7 +1003,7 @@ MemoryContextStatsInternal(MemoryContext context, int level,
if (print_location == PRINT_STATS_TO_STDERR)
{
for (int i = 0; i <= level; i++)
for (int i = 0; i < level; i++)
fprintf(stderr, " ");
fprintf(stderr,
"%d more child contexts containing %zu total in %zu blocks; %zu free (%zu chunks); %zu used\n",
@ -1104,7 +1104,7 @@ MemoryContextStatsPrint(MemoryContext context, void *passthru,
if (print_to_stderr)
{
for (i = 0; i < level; i++)
for (i = 1; i < level; i++)
fprintf(stderr, " ");
fprintf(stderr, "%s: %s%s\n", name, stats_string, truncated_ident);
}
@ -1585,12 +1585,11 @@ ProcessGetMemoryContextInterrupt(void)
{
MemoryContextCounters grand_totals;
int num_contexts = 0;
int level = 0;
path = NIL;
memset(&grand_totals, 0, sizeof(grand_totals));
MemoryContextStatsInternal(c, level, 100, 100, &grand_totals,
MemoryContextStatsInternal(c, 1, 100, 100, &grand_totals,
PRINT_STATS_NONE, &num_contexts);
path = compute_context_path(c, context_id_lookup);