diff options
Diffstat (limited to 'src/include/utils/guc.h')
| -rw-r--r-- | src/include/utils/guc.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/include/utils/guc.h b/src/include/utils/guc.h index 532d6642bb4..1233e07d7da 100644 --- a/src/include/utils/guc.h +++ b/src/include/utils/guc.h @@ -17,9 +17,13 @@ #include "utils/array.h" -/* upper limit for GUC variables measured in kilobytes of memory */ -/* note that various places assume the byte size fits in a "long" variable */ -#if SIZEOF_SIZE_T > 4 && SIZEOF_LONG > 4 +/* + * Maximum for integer GUC variables that are measured in kilobytes of memory. + * This value is chosen to ensure that the corresponding number of bytes fits + * into a variable of type size_t or ssize_t. Be sure to compute the number + * of bytes like "guc_var * (Size) 1024" to avoid int-width overflow. + */ +#if SIZEOF_SIZE_T > 4 #define MAX_KILOBYTES INT_MAX #else #define MAX_KILOBYTES (INT_MAX / 1024) |