follow ups to #2252

internal/datastore/postgres/options.go

@@ -78,7 +78,7 @@ const (
 	defaultExpirationDisabled                = false
 	// no follower delay by default, it should only be set if using read replicas
 	defaultFollowerReadDelay = 0
-	defaultRevisionHeartbeat = false
+	defaultRevisionHeartbeat = true
 )
 
 // Option provides the facility to configure how clients within the

internal/datastore/postgres/postgres.go

@@ -312,14 +312,17 @@ func newPostgresDatastore(
 		followerReadDelayNanos,
 	)
 
-	revisionHeartbeatQuery := fmt.Sprintf(
-		insertHeartBeatRevision,
-		colXID,
-		tableTransaction,
-		colTimestamp,
-		quantizationPeriodNanos,
-		colSnapshot,
-	)
+	var revisionHeartbeatQuery string
+	if config.revisionHeartbeatEnabled {
+		revisionHeartbeatQuery = fmt.Sprintf(
+			insertHeartBeatRevision,
+			colXID,
+			tableTransaction,
+			colTimestamp,
+			quantizationPeriodNanos,
+			colSnapshot,
+		)
+	}
 
 	validTransactionQuery := fmt.Sprintf(
 		queryValidTransaction,
@@ -732,6 +735,11 @@ func (pgd *pgDatastore) Features(ctx context.Context) (*datastore.Features, erro
 }
 
 func (pgd *pgDatastore) OfflineFeatures() (*datastore.Features, error) {
+	continuousCheckpointing := datastore.FeatureUnsupported
+	if pgd.revisionHeartbeatQuery != "" {
+		continuousCheckpointing = datastore.FeatureSupported
+	}
+
 	if pgd.watchEnabled {
 		return &datastore.Features{
 			Watch: datastore.Feature{
@@ -741,7 +749,7 @@ func (pgd *pgDatastore) OfflineFeatures() (*datastore.Features, error) {
 				Status: datastore.FeatureUnsupported,
 			},
 			ContinuousCheckpointing: datastore.Feature{
-				Status: datastore.FeatureSupported,
+				Status: continuousCheckpointing,
 			},
 			WatchEmitsImmediately: datastore.Feature{
 				Status: datastore.FeatureUnsupported,
@@ -765,7 +773,7 @@ func (pgd *pgDatastore) OfflineFeatures() (*datastore.Features, error) {
 const defaultMaxHeartbeatLeaderJitterPercent = 10
 
 func (pgd *pgDatastore) startRevisionHeartbeat(ctx context.Context) error {
-	heartbeatDuration := time.Nanosecond * time.Duration(pgd.quantizationPeriodNanos)
+	heartbeatDuration := max(time.Second, time.Nanosecond*time.Duration(pgd.quantizationPeriodNanos))
 	log.Info().Stringer("interval", heartbeatDuration).Msg("starting revision heartbeat")
 	tick := time.NewTicker(heartbeatDuration)
 

internal/datastore/postgres/postgres_shared_test.go

@@ -89,6 +89,7 @@ func testPostgresDatastore(t *testing.T, config postgresTestConfig) {
 					WatchBufferLength(watchBufferLength),
 					DebugAnalyzeBeforeStatistics(),
 					MigrationPhase(config.migrationPhase),
+					WithRevisionHeartbeat(false), // heartbeat revision messes with tests that assert over revisions
 				)
 				require.NoError(t, err)
 				return ds
@@ -111,6 +112,7 @@ func testPostgresDatastore(t *testing.T, config postgresTestConfig) {
 					WatchBufferLength(watchBufferLength),
 					DebugAnalyzeBeforeStatistics(),
 					MigrationPhase(config.migrationPhase),
+					WithRevisionHeartbeat(false), // heartbeat revision messes with tests that assert over revisions
 				)
 				require.NoError(t, err)
 				return ds
@@ -173,6 +175,7 @@ func testPostgresDatastore(t *testing.T, config postgresTestConfig) {
 				GCInterval(veryLargeGCInterval),
 				WatchBufferLength(50),
 				MigrationPhase(config.migrationPhase),
+				WithRevisionHeartbeat(false),
 			))
 
 			t.Run("OverlappingRevisionWatch", createDatastoreTest(
@@ -297,6 +300,7 @@ func testPostgresDatastoreWithoutCommitTimestamps(t *testing.T, config postgresT
 					GCInterval(veryLargeGCInterval),
 					WatchBufferLength(watchBufferLength),
 					DebugAnalyzeBeforeStatistics(),
+					WithRevisionHeartbeat(false),
 				)
 				require.NoError(t, err)
 				return ds
@@ -316,6 +320,7 @@ func testPostgresDatastoreWithoutCommitTimestamps(t *testing.T, config postgresT
 					GCInterval(gcInterval),
 					WatchBufferLength(watchBufferLength),
 					DebugAnalyzeBeforeStatistics(),
+					WithRevisionHeartbeat(false),
 				)
 				require.NoError(t, err)
 				return ds

internal/datastore/postgres/postgres_test.go

@@ -75,6 +75,7 @@ func TestPostgresDatastoreGC(t *testing.T) {
 			GCInterval(veryLargeGCInterval),
 			WatchBufferLength(1),
 			MigrationPhase(config.migrationPhase),
+			WithRevisionHeartbeat(false),
 		))
 	})
 }

pkg/cmd/datastore/datastore.go

@@ -174,7 +174,7 @@ type Config struct {
 	// Expermimental
 	ExperimentalColumnOptimization           bool `debugmap:"visible"`
 	EnableExperimentalRelationshipExpiration bool `debugmap:"visible"`
-	EnableExperimentalRevisionHeartbeat      bool `debugmap:"visible"`
+	EnableRevisionHeartbeat                  bool `debugmap:"visible"`
 }
 
 //go:generate go run github.com/ecordell/optgen -sensitive-field-name-matches uri,secure -output zz_generated.relintegritykey.options.go . RelIntegrityKey
@@ -628,7 +628,7 @@ func newPostgresPrimaryDatastore(ctx context.Context, opts Config) (datastore.Da
 		postgres.WatchBufferWriteTimeout(opts.WatchBufferWriteTimeout),
 		postgres.MigrationPhase(opts.MigrationPhase),
 		postgres.AllowedMigrations(opts.AllowedMigrations),
-		postgres.WithRevisionHeartbeat(opts.EnableExperimentalRevisionHeartbeat),
+		postgres.WithRevisionHeartbeat(opts.EnableRevisionHeartbeat),
 	}
 
 	commonOptions, err := commonPostgresDatastoreOptions(opts)

pkg/cmd/serve.go

@@ -112,6 +112,7 @@ func RegisterServeFlags(cmd *cobra.Command, config *server.Config) error {
 	apiFlags.Uint32Var(&config.MaxDeleteRelationshipsLimit, "max-delete-relationships-limit", 1000, "maximum number of relationships that can be deleted in a single request")
 	apiFlags.Uint32Var(&config.MaxLookupResourcesLimit, "max-lookup-resources-limit", 1000, "maximum number of resources that can be looked up in a single request")
 	apiFlags.Uint32Var(&config.MaxBulkExportRelationshipsLimit, "max-bulk-export-relationships-limit", 10_000, "maximum number of relationships that can be exported in a single request")
+	apiFlags.BoolVar(&config.EnableRevisionHeartbeat, "enable-revision-heartbeat", true, "enables support for revision heartbeat, used to create a synthetic revision on an interval defined by the quantization window (postgres only)")
 
 	datastoreFlags := nfs.FlagSet(BoldBlue("Datastore"))
 	// Flags for the datastore
@@ -169,7 +170,6 @@ func RegisterServeFlags(cmd *cobra.Command, config *server.Config) error {
 			Msg("The old implementation of LookupResources is no longer available, and a `false` value is no longer valid. Please remove this flag.")
 	}
 
-	experimentalFlags.BoolVar(&config.EnableExperimentalRevisionHeartbeat, "enable-experimental-revision-heartbeat", false, "enables experimental support for postgres revision heartbeat, used to create a synthetic revision on a given interval (postgres only)")
 	experimentalFlags.BoolVar(&config.EnableExperimentalRelationshipExpiration, "enable-experimental-relationship-expiration", false, "enables experimental support for first-class relationship expiration")
 	experimentalFlags.BoolVar(&config.EnableExperimentalWatchableSchemaCache, "enable-experimental-watchable-schema-cache", false, "enables the experimental schema cache which makes use of the Watch API for automatic updates")
 	// TODO: these two could reasonably be put in either the Dispatch group or the Experimental group. Is there a preference?

pkg/cmd/server/server.go

@@ -121,7 +121,7 @@ type Config struct {
 	MaxBulkExportRelationshipsLimit          uint32        `debugmap:"visible"`
 	EnableExperimentalLookupResources        bool          `debugmap:"visible"`
 	EnableExperimentalRelationshipExpiration bool          `debugmap:"visible"`
-	EnableExperimentalRevisionHeartbeat      bool          `debugmap:"visible"`
+	EnableRevisionHeartbeat                  bool          `debugmap:"visible"`
 
 	// Additional Services
 	MetricsAPI util.HTTPServerConfig `debugmap:"visible"`
@@ -229,7 +229,7 @@ func (c *Config) Complete(ctx context.Context) (RunnableServer, error) {
 			// are at most the number of elements returned from a datastore query
 			datastorecfg.WithFilterMaximumIDCount(c.DispatchChunkSize),
 			datastorecfg.WithEnableExperimentalRelationshipExpiration(c.EnableExperimentalRelationshipExpiration),
-			datastorecfg.WithEnableExperimentalRevisionHeartbeat(c.EnableExperimentalRevisionHeartbeat),
+			datastorecfg.WithEnableRevisionHeartbeat(c.EnableRevisionHeartbeat),
 		)
 		if err != nil {
 			return nil, spiceerrors.NewTerminationErrorBuilder(fmt.Errorf("failed to create datastore: %w", err)).