diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/storage/ipc/procarray.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/backend/storage/ipc/procarray.c b/src/backend/storage/ipc/procarray.c index ee4caa51152..8da7b1d8a7b 100644 --- a/src/backend/storage/ipc/procarray.c +++ b/src/backend/storage/ipc/procarray.c @@ -1757,9 +1757,16 @@ ComputeXidHorizons(ComputeXidHorizonsResult *h) * the shared horizon. But in recovery we cannot compute an accurate * per-database horizon as all xids are managed via the * KnownAssignedXids machinery. + * + * Be careful to compute a pessimistic value when MyDatabaseId is not + * set. If this is a backend in the process of starting up, we may not + * use a "too aggressive" horizon (otherwise we could end up using it + * to prune still needed data away). If the current backend never + * connects to a database that is harmless, because + * data_oldest_nonremovable will never be utilized. */ if (in_recovery || - proc->databaseId == MyDatabaseId || + MyDatabaseId == InvalidOid || proc->databaseId == MyDatabaseId || proc->databaseId == 0) /* always include WalSender */ { h->data_oldest_nonremovable = |