diff options
Diffstat (limited to 'src/include/pgstat.h')
| -rw-r--r-- | src/include/pgstat.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/include/pgstat.h b/src/include/pgstat.h index fb242e4b91b..b79a0ebcc3f 100644 --- a/src/include/pgstat.h +++ b/src/include/pgstat.h @@ -177,11 +177,13 @@ typedef struct PgStat_MsgHdr /* ---------- * Space available in a message. This will keep the UDP packets below 1K, - * which should fit unfragmented into the MTU of the lo interface on most - * platforms. Does anybody care for platforms where it doesn't? + * which should fit unfragmented into the MTU of the loopback interface. + * (Larger values of PGSTAT_MAX_MSG_SIZE would work for that on most + * platforms, but we're being conservative here.) * ---------- */ -#define PGSTAT_MSG_PAYLOAD (1000 - sizeof(PgStat_MsgHdr)) +#define PGSTAT_MAX_MSG_SIZE 1000 +#define PGSTAT_MSG_PAYLOAD (PGSTAT_MAX_MSG_SIZE - sizeof(PgStat_MsgHdr)) /* ---------- @@ -225,7 +227,7 @@ typedef struct PgStat_TableEntry * ---------- */ #define PGSTAT_NUM_TABENTRIES \ - ((PGSTAT_MSG_PAYLOAD - sizeof(Oid) - 3 * sizeof(int)) \ + ((PGSTAT_MSG_PAYLOAD - sizeof(Oid) - 3 * sizeof(int) - 2 * sizeof(PgStat_Counter)) \ / sizeof(PgStat_TableEntry)) typedef struct PgStat_MsgTabstat |