diff --git a/connectors/s3vector/conn.go b/connectors/s3vector/conn.go
index 89e50516..ac411bc1 100644
--- a/connectors/s3vector/conn.go
+++ b/connectors/s3vector/conn.go
@@ -19,7 +19,6 @@ import (
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
 	"golang.org/x/sync/errgroup"
-	"golang.org/x/time/rate"
 )
 
 type conn struct {
@@ -28,7 +27,7 @@ type conn struct {
 	vectorKey      string
 	maxParallelism int
 	batchSize      int
-	limiter        *rate.Limiter
+	limiter        util.NamespaceLimiter
 }
 
 // GeneratePlan implements adiomv1connect.ConnectorServiceHandler.
@@ -87,9 +86,10 @@ func (c *conn) WriteData(ctx context.Context, r *connect.Request[adiomv1.WriteDa
 
 	eg, ctx := errgroup.WithContext(ctx)
 	eg.SetLimit(c.maxParallelism)
+	limiter := c.limiter.Get(r.Msg.GetNamespace())
 	for batch := range slices.Chunk(vectors, c.batchSize) {
 		eg.Go(func() error {
-			if err := c.limiter.WaitN(ctx, len(batch)); err != nil {
+			if err := limiter.WaitN(ctx, len(batch)); err != nil {
 				return fmt.Errorf("err in limiter: %w", err)
 			}
 			if _, err := c.client.PutVectors(ctx, &s3vectors.PutVectorsInput{
@@ -220,11 +220,12 @@ func (c *conn) WriteUpdates(ctx context.Context, r *connect.Request[adiomv1.Writ
 		}
 	}
 	if len(updates) > 0 {
+		limiter := c.limiter.Get(r.Msg.GetNamespace())
 		eg, ctx := errgroup.WithContext(ctx)
 		eg.SetLimit(c.maxParallelism)
 		for batch := range slices.Chunk(toDelete, c.batchSize) {
 			eg.Go(func() error {
-				if err := c.limiter.WaitN(ctx, len(batch)); err != nil {
+				if err := limiter.WaitN(ctx, len(batch)); err != nil {
 					return fmt.Errorf("err in limiter: %w", err)
 				}
 				if _, err := c.client.DeleteVectors(ctx, &s3vectors.DeleteVectorsInput{
@@ -239,7 +240,7 @@ func (c *conn) WriteUpdates(ctx context.Context, r *connect.Request[adiomv1.Writ
 		}
 		for batch := range slices.Chunk(vectors, c.batchSize) {
 			eg.Go(func() error {
-				if err := c.limiter.WaitN(ctx, len(batch)); err != nil {
+				if err := limiter.WaitN(ctx, len(batch)); err != nil {
 					return fmt.Errorf("err in limiter: %w", err)
 				}
 				if _, err := c.client.PutVectors(ctx, &s3vectors.PutVectorsInput{
@@ -259,7 +260,7 @@ func (c *conn) WriteUpdates(ctx context.Context, r *connect.Request[adiomv1.Writ
 	return connect.NewResponse(&adiomv1.WriteUpdatesResponse{}), nil
 }
 
-func NewConn(bucketName string, vectorKey string, maxParallelism int, batchSize int, limiter *rate.Limiter) (*conn, error) {
+func NewConn(bucketName string, vectorKey string, maxParallelism int, batchSize int, rateLimit int) (*conn, error) {
 	awsConfig, err := config.LoadDefaultConfig(context.Background())
 	if err != nil {
 		return nil, err
@@ -271,7 +272,7 @@ func NewConn(bucketName string, vectorKey string, maxParallelism int, batchSize
 		vectorKey:      vectorKey,
 		maxParallelism: maxParallelism,
 		batchSize:      batchSize,
-		limiter:        limiter,
+		limiter:        util.NewNamespaceLimiter(nil, rateLimit),
 	}, nil
 }
 
diff --git a/connectors/util/limiter.go b/connectors/util/limiter.go
new file mode 100644
index 00000000..edafdf9c
--- /dev/null
+++ b/connectors/util/limiter.go
@@ -0,0 +1,57 @@
+package util
+
+import (
+	"sync"
+
+	"golang.org/x/time/rate"
+)
+
+type NamespaceLimiter interface {
+	Get(namespace string) *rate.Limiter
+}
+
+type namespaceLimiter struct {
+	mut                   sync.RWMutex
+	limiters              map[string]*rate.Limiter
+	defaultLimiterFactory func() *rate.Limiter
+}
+
+func (l *namespaceLimiter) Get(namespace string) *rate.Limiter {
+	l.mut.RLock()
+	limiter, ok := l.limiters[namespace]
+	l.mut.RUnlock()
+	if !ok {
+		l.mut.Lock()
+		limiter2, ok2 := l.limiters[namespace]
+		if ok2 {
+			l.mut.Unlock()
+			return limiter2
+		}
+		limiter = l.defaultLimiterFactory()
+		l.limiters[namespace] = limiter
+		l.mut.Unlock()
+		return limiter
+	}
+	return limiter
+}
+
+func NewNamespaceLimiter(namespaceToLimit map[string]int, defaultLimit int) *namespaceLimiter {
+	limiters := map[string]*rate.Limiter{}
+	for k, v := range namespaceToLimit {
+		limit := rate.Limit(v)
+		if v < 0 {
+			limit = rate.Inf
+		}
+		limiters[k] = rate.NewLimiter(limit, v)
+	}
+	limit := rate.Limit(defaultLimit)
+	if defaultLimit < 0 {
+		limit = rate.Inf
+	}
+	return &namespaceLimiter{
+		limiters: limiters,
+		defaultLimiterFactory: func() *rate.Limiter {
+			return rate.NewLimiter(limit, defaultLimit)
+		},
+	}
+}
diff --git a/internal/app/options/connectorflags.go b/internal/app/options/connectorflags.go
index 130e1909..c917c19e 100644
--- a/internal/app/options/connectorflags.go
+++ b/internal/app/options/connectorflags.go
@@ -25,7 +25,6 @@ import (
 	"github.com/urfave/cli/v2"
 	"github.com/urfave/cli/v2/altsrc"
 	"golang.org/x/net/http2"
-	"golang.org/x/time/rate"
 )
 
 var ErrMissingConnector = errors.New("missing or unsupported connector")
@@ -380,17 +379,12 @@ func GetRegisteredConnectors() []RegisteredConnector {
 				},
 				&cli.IntFlag{
 					Name:  "rate-limit",
-					Value: 500,
-					Usage: "Max vectors per second across workers on this process.",
-				},
-				&cli.IntFlag{
-					Name:  "rate-limit-burst",
-					Value: 700,
-					Usage: "Max vectors per second across workers on this process (burst). Will be set to at least `rate-limit`.",
+					Value: 2500,
+					Usage: "Max vectors per second across workers on this process per namespace (vector index).",
 				},
 				&cli.IntFlag{
 					Name:  "batch-size",
-					Value: 200,
+					Value: 500,
 					Usage: "Max size of each PutVector requests (aws hard limit is 500).",
 				},
 			}, func(c *cli.Context, args []string, _ AdditionalSettings) (adiomv1connect.ConnectorServiceHandler, error) {
@@ -398,10 +392,8 @@ func GetRegisteredConnectors() []RegisteredConnector {
 				vectorKey := c.String("vector-key")
 				maxParallelism := c.Int("max-parallelism")
 				rateLimit := c.Int("rate-limit")
-				rateLimitBurst := max(c.Int("rate-limit-burst"), rateLimit)
 				batchSize := c.Int("batch-size")
-				limiter := rate.NewLimiter(rate.Limit(rateLimit), rateLimitBurst)
-				return s3vector.NewConn(bucket, vectorKey, maxParallelism, batchSize, limiter)
+				return s3vector.NewConn(bucket, vectorKey, maxParallelism, batchSize, rateLimit)
 			}),
 		},
 		{