diff --git a/extensions/memory-core/src/memory/manager-sync-ops.ts b/extensions/memory-core/src/memory/manager-sync-ops.ts
index 1b82f0c8f770..ba6f6951a1ba 100644
--- a/extensions/memory-core/src/memory/manager-sync-ops.ts
+++ b/extensions/memory-core/src/memory/manager-sync-ops.ts
@@ -295,7 +295,7 @@ export abstract class MemoryManagerSyncOps {
     return openMemoryDatabaseAtPath(dbPath, this.settings.store.vector.enabled);
   }
 
-  private seedEmbeddingCache(sourceDb: DatabaseSync): void {
+  private async seedEmbeddingCache(sourceDb: DatabaseSync): Promise<void> {
     if (!this.cache.enabled) {
       return;
     }
@@ -323,6 +323,9 @@ export abstract class MemoryManagerSyncOps {
            updated_at=excluded.updated_at`,
       );
       this.db.exec("BEGIN");
+      // Yield to event loop every N rows so HTTP /health probes stay responsive.
+      const SEED_EMBEDDING_YIELD_EVERY = 1000;
+      let rowCount = 0;
       for (const row of rows) {
         insert.run(
           row.provider,
@@ -333,6 +336,12 @@ export abstract class MemoryManagerSyncOps {
           row.dims,
           row.updated_at,
         );
+        rowCount += 1;
+        if (rowCount % SEED_EMBEDDING_YIELD_EVERY === 0) {
+          await new Promise<void>((resolve) => {
+            setImmediate(resolve);
+          });
+        }
       }
       this.db.exec("COMMIT");
     } catch (err) {
@@ -1160,7 +1169,7 @@ export abstract class MemoryManagerSyncOps {
         targetPath: dbPath,
         tempPath: tempDbPath,
         build: async () => {
-          this.seedEmbeddingCache(originalDb);
+          await this.seedEmbeddingCache(originalDb);
           const shouldSyncMemory = this.sources.has("memory");
           const shouldSyncSessions = this.shouldSyncSessions(
             { reason: params.reason, force: params.force },