From f358e57019d5915dbf9b8427222907eb86e8d81f Mon Sep 17 00:00:00 2001
From: Ricardo Garim <rswarovsky@gmail.com>
Date: Mon, 9 Feb 2026 10:55:48 -0300
Subject: [PATCH 1/4] fix: add TTL index to statistics collection for automatic
 cleanup

---
 packages/models/src/models/Statistics.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/models/src/models/Statistics.ts b/packages/models/src/models/Statistics.ts
index 8a1dae77dc76e..47ddb6a633f93 100644
--- a/packages/models/src/models/Statistics.ts
+++ b/packages/models/src/models/Statistics.ts
@@ -10,7 +10,10 @@ export class StatisticsRaw extends BaseRaw<IStats> implements IStatisticsModel {
 	}
 
 	protected override modelIndexes(): IndexDescription[] {
-		return [{ key: { createdAt: -1 } }];
+		return [
+			{ key: { createdAt: -1 } },
+			{ key: { createdAt: 1 }, expireAfterSeconds: 365 * 24 * 60 * 60 }, // expire after 1 year
+		];
 	}
 
 	async findLast(): Promise<IStats> {

From 073dfa8bbeae58526a95d53330872cdad578439b Mon Sep 17 00:00:00 2001
From: Ricardo Garim <rswarovsky@gmail.com>
Date: Mon, 9 Feb 2026 10:55:52 -0300
Subject: [PATCH 2/4] chore: add changeset

---
 .changeset/young-humans-stare.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/young-humans-stare.md

diff --git a/.changeset/young-humans-stare.md b/.changeset/young-humans-stare.md
new file mode 100644
index 0000000000000..c887f9479f673
--- /dev/null
+++ b/.changeset/young-humans-stare.md
@@ -0,0 +1,5 @@
+---
+'@rocket.chat/models': patch
+---
+
+Adds automatic cleanup of statistics collection with 1-year retention via TTL index.

From 6df9fef0d93e14cd14d5cdc8f2b258cd6f78ae37 Mon Sep 17 00:00:00 2001
From: Ricardo Garim <rswarovsky@gmail.com>
Date: Mon, 9 Feb 2026 13:20:35 -0300
Subject: [PATCH 3/4] fix: unify statistics indexes with TTL expiration and add
 migration

---
 apps/meteor/server/startup/migrations/index.ts |  1 +
 apps/meteor/server/startup/migrations/v336.ts  | 15 +++++++++++++++
 packages/models/src/models/Statistics.ts       |  5 +----
 3 files changed, 17 insertions(+), 4 deletions(-)
 create mode 100644 apps/meteor/server/startup/migrations/v336.ts

diff --git a/apps/meteor/server/startup/migrations/index.ts b/apps/meteor/server/startup/migrations/index.ts
index d10693f181110..deadd9ff88f59 100644
--- a/apps/meteor/server/startup/migrations/index.ts
+++ b/apps/meteor/server/startup/migrations/index.ts
@@ -41,5 +41,6 @@ import './v332';
 import './v333';
 import './v334';
 import './v335';
+import './v336';
 
 export * from './xrun';
diff --git a/apps/meteor/server/startup/migrations/v336.ts b/apps/meteor/server/startup/migrations/v336.ts
new file mode 100644
index 0000000000000..2f0e174e900ab
--- /dev/null
+++ b/apps/meteor/server/startup/migrations/v336.ts
@@ -0,0 +1,15 @@
+import { Statistics } from '@rocket.chat/models';
+
+import { addMigration } from '../../lib/migrations';
+
+addMigration({
+	version: 336,
+	name: 'Remove redundant statistics createdAt descending index',
+	async up() {
+		try {
+			await Statistics.col.dropIndex('createdAt_-1');
+		} catch {
+			// Index might not exist on fresh installations
+		}
+	},
+});
diff --git a/packages/models/src/models/Statistics.ts b/packages/models/src/models/Statistics.ts
index 47ddb6a633f93..38f8e82c6afbf 100644
--- a/packages/models/src/models/Statistics.ts
+++ b/packages/models/src/models/Statistics.ts
@@ -10,10 +10,7 @@ export class StatisticsRaw extends BaseRaw<IStats> implements IStatisticsModel {
 	}
 
 	protected override modelIndexes(): IndexDescription[] {
-		return [
-			{ key: { createdAt: -1 } },
-			{ key: { createdAt: 1 }, expireAfterSeconds: 365 * 24 * 60 * 60 }, // expire after 1 year
-		];
+		return [{ key: { createdAt: 1 }, expireAfterSeconds: 365 * 24 * 60 * 60 }];
 	}
 
 	async findLast(): Promise<IStats> {

From d57f8cbf7d77d68f527d21ee0fc9c8282fe828db Mon Sep 17 00:00:00 2001
From: Ricardo Garim <rswarovsky@gmail.com>
Date: Mon, 9 Feb 2026 16:47:31 -0300
Subject: [PATCH 4/4] chore: add changeset

---
 .changeset/dry-gifts-report.md | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 .changeset/dry-gifts-report.md

diff --git a/.changeset/dry-gifts-report.md b/.changeset/dry-gifts-report.md
new file mode 100644
index 0000000000000..353dfaa2c857f
--- /dev/null
+++ b/.changeset/dry-gifts-report.md
@@ -0,0 +1,6 @@
+---
+'@rocket.chat/models': patch
+'@rocket.chat/meteor': patch
+---
+
+Adds migration to remove redundant statistics index after TTL index consolidation.