diff --git a/packages/backend/server/src/base/event/eventbus.ts b/packages/backend/server/src/base/event/eventbus.ts
index af0c33a01a..7d8c46ff61 100644
--- a/packages/backend/server/src/base/event/eventbus.ts
+++ b/packages/backend/server/src/base/event/eventbus.ts
@@ -68,7 +68,7 @@ export class EventBus
       this.cls.run(() => {
         requestId = requestId ?? genRequestId('event');
         this.cls.set(CLS_ID, requestId);
-        this.logger.log(`Server Event: ${event} (Received)`);
+        this.logger.debug(`Server Event: ${event} (Received)`);
         this.emit(event, payload);
       });
     });
@@ -78,7 +78,7 @@ export class EventBus
    * Emit event to trigger all listeners on current instance
    */
   async emitAsync<T extends EventName>(event: T, payload: Events[T]) {
-    this.logger.log(`Dispatch event: ${event} (async)`);
+    this.logger.debug(`Dispatch event: ${event} (async)`);
     return await this.emitter.emitAsync(event, payload);
   }
 
@@ -86,7 +86,7 @@ export class EventBus
    * Emit event to trigger all listeners on current instance
    */
   emit<T extends EventName>(event: T, payload: Events[T]) {
-    this.logger.log(`Dispatch event: ${event}`);
+    this.logger.debug(`Dispatch event: ${event}`);
 
     // NOTE(@forehalo):
     //   Because all event handlers are wrapped in promisified metrics and cls context, they will always run in standalone tick.
@@ -103,7 +103,7 @@ export class EventBus
    * Broadcast event to trigger all listeners on all instance in cluster
    */
   broadcast<T extends EventName>(event: T, payload: Events[T]) {
-    this.logger.log(`Server Event: ${event} (Send)`);
+    this.logger.debug(`Server Event: ${event} (Send)`);
     this.server?.serverSideEmit('broadcast', event, payload, this.cls.getId());
   }
 
diff --git a/packages/backend/server/src/base/job/queue/executor.ts b/packages/backend/server/src/base/job/queue/executor.ts
index 990a325a30..93689bab20 100644
--- a/packages/backend/server/src/base/job/queue/executor.ts
+++ b/packages/backend/server/src/base/job/queue/executor.ts
@@ -68,9 +68,9 @@ export class JobExecutor implements OnModuleDestroy {
       async () => {
         const signature = `[${name}] (${handler.name})`;
         try {
-          this.logger.log(`Job started: ${signature}`);
+          this.logger.debug(`Job started: ${signature}`);
           const ret = await handler.fn(payload);
-          this.logger.log(`Job finished: ${signature}, signal=${ret}`);
+          this.logger.debug(`Job finished: ${signature}, signal=${ret}`);
           return ret;
         } catch (e) {
           this.logger.error(`Job failed: ${signature}`, e);
diff --git a/packages/backend/server/src/base/job/queue/queue.ts b/packages/backend/server/src/base/job/queue/queue.ts
index 9d5a0d5240..70576f2d6b 100644
--- a/packages/backend/server/src/base/job/queue/queue.ts
+++ b/packages/backend/server/src/base/job/queue/queue.ts
@@ -30,7 +30,7 @@ export class JobQueue {
       } as JobData<T>,
       opts
     );
-    this.logger.log(`Job [${name}] added; id=${job.id}`);
+    this.logger.debug(`Job [${name}] added; id=${job.id}`);
     return job;
   }
 
diff --git a/packages/backend/server/src/core/doc-service/controller.ts b/packages/backend/server/src/core/doc-service/controller.ts
index 09a2db7322..6a28b982ba 100644
--- a/packages/backend/server/src/core/doc-service/controller.ts
+++ b/packages/backend/server/src/core/doc-service/controller.ts
@@ -32,7 +32,7 @@ export class DocRpcController {
     if (!doc) {
       throw new NotFound('Doc not found');
     }
-    this.logger.log(
+    this.logger.debug(
       `get doc ${docId} from workspace ${workspaceId}, size: ${doc.bin.length}`
     );
     res.setHeader('x-doc-timestamp', doc.timestamp.toString());
@@ -59,7 +59,7 @@ export class DocRpcController {
     if (!diff) {
       throw new NotFound('Doc not found');
     }
-    this.logger.log(
+    this.logger.debug(
       `get doc diff ${docId} from workspace ${workspaceId}, missing size: ${diff.missing.length}, old state size: ${stateVector?.length}, new state size: ${diff.state.length}`
     );
     res.setHeader('x-doc-timestamp', diff.timestamp.toString());
@@ -86,7 +86,7 @@ export class DocRpcController {
     if (!content) {
       throw new NotFound('Doc not found');
     }
-    this.logger.log(`get doc content ${docId} from workspace ${workspaceId}`);
+    this.logger.debug(`get doc content ${docId} from workspace ${workspaceId}`);
     return content;
   }
 
@@ -98,7 +98,7 @@ export class DocRpcController {
     if (!content) {
       throw new NotFound('Workspace not found');
     }
-    this.logger.log(`get workspace content ${workspaceId}`);
+    this.logger.debug(`get workspace content ${workspaceId}`);
     return content;
   }
 }
diff --git a/packages/backend/server/src/core/mail/sender.ts b/packages/backend/server/src/core/mail/sender.ts
index 1304fb0f75..b941f8e41e 100644
--- a/packages/backend/server/src/core/mail/sender.ts
+++ b/packages/backend/server/src/core/mail/sender.ts
@@ -103,7 +103,7 @@ export class MailSender {
       }
 
       metrics.mail.counter('accepted_total').add(1, { name });
-      this.logger.log(`Mail [${name}] sent successfully.`);
+      this.logger.debug(`Mail [${name}] sent successfully.`);
       if (this.usingTestAccount) {
         this.logger.debug(
           `  ⚙️ Mail preview url: ${getTestMessageUrl(result)}`
diff --git a/packages/backend/server/src/core/notification/service.ts b/packages/backend/server/src/core/notification/service.ts
index 4a13ab392f..c6057dd8a2 100644
--- a/packages/backend/server/src/core/notification/service.ts
+++ b/packages/backend/server/src/core/notification/service.ts
@@ -78,7 +78,7 @@ export class NotificationService {
         },
       },
     });
-    this.logger.log(`Mention email sent to user ${receiver.id}`);
+    this.logger.debug(`Mention email sent to user ${receiver.id}`);
   }
 
   async createInvitation(input: InvitationNotificationCreate) {
@@ -123,7 +123,7 @@ export class NotificationService {
         url: inviteUrl,
       },
     });
-    this.logger.log(
+    this.logger.debug(
       `Invitation email sent to user ${receiver.id} for workspace ${input.body.workspaceId}`
     );
   }
@@ -179,7 +179,7 @@ export class NotificationService {
         ),
       },
     });
-    this.logger.log(
+    this.logger.debug(
       `Invitation accepted email sent to user ${inviter.id} for workspace ${workspaceId}`
     );
   }
@@ -244,7 +244,7 @@ export class NotificationService {
         ),
       },
     });
-    this.logger.log(
+    this.logger.debug(
       `Invitation review request email sent to user ${reviewer.id} for workspace ${workspaceId}`
     );
   }
@@ -283,7 +283,7 @@ export class NotificationService {
         url: this.url.link(`/workspace/${workspaceId}`),
       },
     });
-    this.logger.log(
+    this.logger.debug(
       `Invitation review approved email sent to user ${receiver.id} for workspace ${workspaceId}`
     );
   }
@@ -321,7 +321,7 @@ export class NotificationService {
         },
       },
     });
-    this.logger.log(
+    this.logger.debug(
       `Invitation review declined email sent to user ${receiver.id} for workspace ${workspaceId}`
     );
   }
diff --git a/packages/backend/server/src/core/permission/doc.ts b/packages/backend/server/src/core/permission/doc.ts
index 8e478c9f89..9f930baf9e 100644
--- a/packages/backend/server/src/core/permission/doc.ts
+++ b/packages/backend/server/src/core/permission/doc.ts
@@ -36,7 +36,7 @@ export class DocAccessController extends AccessController<'doc'> {
     const allow = permissions[action] || false;
 
     if (!allow) {
-      this.logger.log('Doc access check failed', {
+      this.logger.debug('Doc access check failed', {
         action,
         resource,
         role,
diff --git a/packages/backend/server/src/core/permission/workspace.ts b/packages/backend/server/src/core/permission/workspace.ts
index b69d1b1c1e..59b384df84 100644
--- a/packages/backend/server/src/core/permission/workspace.ts
+++ b/packages/backend/server/src/core/permission/workspace.ts
@@ -40,7 +40,7 @@ export class WorkspaceAccessController extends AccessController<'ws'> {
     const allow = permissions[action] || false;
 
     if (!allow) {
-      this.logger.log('Workspace access check failed', {
+      this.logger.debug('Workspace access check failed', {
         action,
         resource,
         role,
diff --git a/packages/backend/server/src/core/sync/gateway.ts b/packages/backend/server/src/core/sync/gateway.ts
index c90e01eb6c..711c6fe630 100644
--- a/packages/backend/server/src/core/sync/gateway.ts
+++ b/packages/backend/server/src/core/sync/gateway.ts
@@ -152,13 +152,15 @@ export class SpaceSyncGateway
 
   handleConnection() {
     this.connectionCount++;
-    this.logger.log(`New connection, total: ${this.connectionCount}`);
+    this.logger.debug(`New connection, total: ${this.connectionCount}`);
     metrics.socketio.gauge('connections').record(this.connectionCount);
   }
 
   handleDisconnect() {
     this.connectionCount--;
-    this.logger.log(`Connection disconnected, total: ${this.connectionCount}`);
+    this.logger.debug(
+      `Connection disconnected, total: ${this.connectionCount}`
+    );
     metrics.socketio.gauge('connections').record(this.connectionCount);
   }
 
diff --git a/packages/backend/server/src/core/workspaces/resolvers/doc.ts b/packages/backend/server/src/core/workspaces/resolvers/doc.ts
index 253910f1be..a77bd99318 100644
--- a/packages/backend/server/src/core/workspaces/resolvers/doc.ts
+++ b/packages/backend/server/src/core/workspaces/resolvers/doc.ts
@@ -536,7 +536,7 @@ export class DocResolver {
     @Args('input') input: UpdateDocDefaultRoleInput
   ) {
     if (input.role === DocRole.Owner) {
-      this.logger.log(
+      this.logger.debug(
         `Doc default role can not be owner (${JSON.stringify(input)})`
       );
       throw new DocDefaultRoleCanNotBeOwner();
@@ -559,7 +559,7 @@ export class DocResolver {
       await this.ac.user(user.id).doc(input).assert('Doc.Users.Manage');
     } catch (error) {
       if (error instanceof DocActionDenied) {
-        this.logger.log(
+        this.logger.debug(
           `User does not have permission to update page default role (${JSON.stringify(
             {
               ...pairs,
diff --git a/packages/backend/server/src/models/doc.ts b/packages/backend/server/src/models/doc.ts
index 63a4cee422..d5d7a19bdc 100644
--- a/packages/backend/server/src/models/doc.ts
+++ b/packages/backend/server/src/models/doc.ts
@@ -112,9 +112,11 @@ export class DocModel extends BaseModel {
         },
       },
     });
-    this.logger.log(
-      `Deleted ${count} updates for workspace ${workspaceId} doc ${docId}`
-    );
+    if (count > 0) {
+      this.logger.log(
+        `Deleted ${count} updates for workspace ${workspaceId} doc ${docId}`
+      );
+    }
     return count;
   }
 
diff --git a/packages/backend/server/src/models/history.ts b/packages/backend/server/src/models/history.ts
index 65b2dd00d6..7155e6b140 100644
--- a/packages/backend/server/src/models/history.ts
+++ b/packages/backend/server/src/models/history.ts
@@ -47,7 +47,7 @@ export class HistoryModel extends BaseModel {
         expiredAt: new Date(Date.now() + maxAge),
       },
     });
-    this.logger.log(
+    this.logger.debug(
       `Created history ${row.timestamp} for ${snapshot.docId} in ${snapshot.spaceId}`
     );
     return {
@@ -163,7 +163,9 @@ export class HistoryModel extends BaseModel {
         },
       },
     });
-    this.logger.log(`Deleted ${count} expired histories`);
+    if (count > 0) {
+      this.logger.log(`Deleted ${count} expired histories`);
+    }
     return count;
   }
 }
diff --git a/packages/backend/server/src/models/notification.ts b/packages/backend/server/src/models/notification.ts
index 7dc88df4a5..a180c4befa 100644
--- a/packages/backend/server/src/models/notification.ts
+++ b/packages/backend/server/src/models/notification.ts
@@ -133,7 +133,7 @@ export class NotificationModel extends BaseModel {
       type: NotificationType.Mention,
       body: data.body,
     });
-    this.logger.log(
+    this.logger.debug(
       `Created mention notification:${row.id} for user:${data.userId} in workspace:${data.body.workspaceId}`
     );
     return row as MentionNotification;
@@ -154,7 +154,7 @@ export class NotificationModel extends BaseModel {
       type,
       body: data.body,
     });
-    this.logger.log(
+    this.logger.debug(
       `Created ${type} notification ${row.id} to user ${data.userId} in workspace ${data.body.workspaceId}`
     );
     return row as InvitationNotification;
@@ -171,7 +171,7 @@ export class NotificationModel extends BaseModel {
       type,
       body: data.body,
     });
-    this.logger.log(
+    this.logger.debug(
       `Created ${type} notification ${row.id} to user ${data.userId} in workspace ${data.body.workspaceId}`
     );
     return row as InvitationReviewDeclinedNotification;
@@ -239,7 +239,9 @@ export class NotificationModel extends BaseModel {
       // delete notifications that are older than one year
       where: { createdAt: { lte: new Date(Date.now() - ONE_YEAR) } },
     });
-    this.logger.log(`Deleted ${count} expired notifications`);
+    if (count > 0) {
+      this.logger.log(`Deleted ${count} expired notifications`);
+    }
     return count;
   }
 
diff --git a/packages/backend/server/src/models/session.ts b/packages/backend/server/src/models/session.ts
index 88c9512e42..44940b27cb 100644
--- a/packages/backend/server/src/models/session.ts
+++ b/packages/backend/server/src/models/session.ts
@@ -37,7 +37,9 @@ export class SessionModel extends BaseModel {
         id,
       },
     });
-    this.logger.log(`Deleted session success by id: ${id}`);
+    if (count > 0) {
+      this.logger.log(`Deleted session success by id: ${id}`);
+    }
     return count;
   }
 
@@ -134,20 +136,24 @@ export class SessionModel extends BaseModel {
         sessionId,
       },
     });
-    this.logger.log(
-      `Deleted user sessions success by userId: ${userId} and sessionId: ${sessionId}`
-    );
+    if (count > 0) {
+      this.logger.log(
+        `Deleted user sessions success by userId: ${userId} and sessionId: ${sessionId}`
+      );
+    }
     return count;
   }
 
   async cleanExpiredUserSessions() {
-    const result = await this.db.userSession.deleteMany({
+    const { count } = await this.db.userSession.deleteMany({
       where: {
         expiresAt: {
           lte: new Date(),
         },
       },
     });
-    this.logger.log(`Cleaned ${result.count} expired user sessions`);
+    if (count > 0) {
+      this.logger.log(`Cleaned ${count} expired user sessions`);
+    }
   }
 }
diff --git a/packages/backend/server/src/models/user-doc.ts b/packages/backend/server/src/models/user-doc.ts
index 22e5e0adfb..bac804b17e 100644
--- a/packages/backend/server/src/models/user-doc.ts
+++ b/packages/backend/server/src/models/user-doc.ts
@@ -92,13 +92,15 @@ export class UserDocModel extends BaseModel {
    * Delete a user doc by userId and docId.
    */
   async delete(userId: string, docId: string) {
-    await this.db.userSnapshot.deleteMany({
+    const { count } = await this.db.userSnapshot.deleteMany({
       where: {
         userId,
         id: docId,
       },
     });
-    this.logger.log(`Deleted user ${userId} doc ${docId}`);
+    if (count > 0) {
+      this.logger.log(`Deleted user ${userId} doc ${docId}`);
+    }
   }
 
   /**
@@ -110,7 +112,9 @@ export class UserDocModel extends BaseModel {
         userId,
       },
     });
-    this.logger.log(`Deleted user ${userId} ${count} docs`);
+    if (count > 0) {
+      this.logger.log(`Deleted user ${userId} ${count} docs`);
+    }
     return count;
   }
 }
diff --git a/packages/backend/server/src/models/user-settings.ts b/packages/backend/server/src/models/user-settings.ts
index f54afa5e3e..7be7ad412f 100644
--- a/packages/backend/server/src/models/user-settings.ts
+++ b/packages/backend/server/src/models/user-settings.ts
@@ -36,7 +36,7 @@ export class UserSettingsModel extends BaseModel {
         payload,
       },
     });
-    this.logger.log(`UserSettings updated for user ${userId}`);
+    this.logger.debug(`UserSettings updated for user ${userId}`);
     return payload;
   }
 
diff --git a/packages/backend/server/src/models/user.ts b/packages/backend/server/src/models/user.ts
index 858d2fd939..d97518ab2d 100644
--- a/packages/backend/server/src/models/user.ts
+++ b/packages/backend/server/src/models/user.ts
@@ -303,7 +303,7 @@ export class UserModel extends BaseModel {
     const account = await this.db.connectedAccount.create({
       data,
     });
-    this.logger.log(
+    this.logger.debug(
       `Connected account ${account.provider}:${account.id} created`
     );
     return account;
diff --git a/packages/backend/server/src/models/verification-token.ts b/packages/backend/server/src/models/verification-token.ts
index 9956b35140..5da61e5190 100644
--- a/packages/backend/server/src/models/verification-token.ts
+++ b/packages/backend/server/src/models/verification-token.ts
@@ -122,7 +122,11 @@ export class VerificationTokenModel extends BaseModel {
         type,
       },
     });
-    this.logger.log(`Deleted token success by type ${type} and token ${token}`);
+    if (count > 0) {
+      this.logger.log(
+        `Deleted token success by type ${type} and token ${token}`
+      );
+    }
     return count;
   }
 
@@ -137,7 +141,9 @@ export class VerificationTokenModel extends BaseModel {
         },
       },
     });
-    this.logger.log(`Cleaned ${count} expired tokens`);
+    if (count > 0) {
+      this.logger.log(`Cleaned ${count} expired tokens`);
+    }
     return count;
   }
 }