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Introduce BYTES unit for GUCs.

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This is already useful for track_activity_query_size, and will further
be used in a later commit making the WAL segment size configurable.

Author: Beena Emerson
Reviewed-By: Andres Freund
Discussion: https://postgr.es/m/CAOG9ApEu8bXVwBxkOO9J7ZpM76TASK_vFMEEiCEjwhMmSLiaqQ@mail.gmail.com
This commit is contained in:
Andres Freund 2017-09-12 12:13:12 -07:00
parent 2d4a614e1e
commit 6e7baa3227
2 changed files with 10 additions and 5 deletions
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14
src/backend/utils/misc/guc.c
View File

@ -722,6 +722,11 @@ static const char *memory_units_hint = gettext_noop("Valid units for this parame
static const unit_conversion memory_unit_conversion_table[] =
{
{"GB", GUC_UNIT_BYTE, 1024 * 1024 * 1024},
{"MB", GUC_UNIT_BYTE, 1024 * 1024},
{"kB", GUC_UNIT_BYTE, 1024},
{"B", GUC_UNIT_BYTE, 1},
{"TB", GUC_UNIT_KB, 1024 * 1024 * 1024},
{"GB", GUC_UNIT_KB, 1024 * 1024},
{"MB", GUC_UNIT_KB, 1024},
@ -2863,11 +2868,7 @@ static struct config_int ConfigureNamesInt[] =
{"track_activity_query_size", PGC_POSTMASTER, RESOURCES_MEM,
gettext_noop("Sets the size reserved for pg_stat_activity.query, in bytes."),
NULL,
/*
* There is no _bytes_ unit, so the user can't supply units for
* this.
*/
GUC_UNIT_BYTE
},
&pgstat_track_activity_query_size,
1024, 100, 102400,
@ -8113,6 +8114,9 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
{
switch (conf->flags & (GUC_UNIT_MEMORY | GUC_UNIT_TIME))
{
case GUC_UNIT_BYTE:
values[2] = "B";
break;
case GUC_UNIT_KB:
values[2] = "kB";
break;

1
src/include/utils/guc.h
View File

@ -219,6 +219,7 @@ typedef enum
#define GUC_UNIT_BLOCKS 0x2000 /* value is in blocks */
#define GUC_UNIT_XBLOCKS 0x3000 /* value is in xlog blocks */
#define GUC_UNIT_MB 0x4000 /* value is in megabytes */
#define GUC_UNIT_BYTE 0x8000 /* value is in bytes */
#define GUC_UNIT_MEMORY 0xF000 /* mask for size-related units */
#define GUC_UNIT_MS 0x10000 /* value is in milliseconds */