diff --git a/apps/desktop/src/components/connection/ConnectionDialog.vue b/apps/desktop/src/components/connection/ConnectionDialog.vue
index 11b874b594..b6ec78277d 100644
--- a/apps/desktop/src/components/connection/ConnectionDialog.vue
+++ b/apps/desktop/src/components/connection/ConnectionDialog.vue
@@ -74,7 +74,7 @@ import { isTauriRuntime } from "@/lib/backend/tauriRuntime";
 import { isWindows } from "@/lib/backend/platform";
 import { applyMeilisearchBasePathToExternalConfig, applyParsedConnectionUrl, normalizeMongoConnectionString, parseConnectionUrl } from "@/lib/connection/connectionUrl";
 import { hasXuguConnectionDatabase } from "@/lib/connection/xuguDatabase";
-import { DEFAULT_QUERY_TIMEOUT_SECS, MAX_CONNECT_TIMEOUT_SECS, MAX_QUERY_TIMEOUT_SECS } from "@/lib/connection/timeoutLimits";
+import { DEFAULT_QUERY_TIMEOUT_SECS, MAX_CONNECT_TIMEOUT_SECS, MAX_IDLE_TIMEOUT_SECS, MAX_QUERY_TIMEOUT_SECS, supportsIdleTimeout } from "@/lib/connection/timeoutLimits";
 import { buildOracleTnsConnectionString, normalizeOracleTnsAdminPath, parseOracleTnsConnectionString } from "@/lib/connection/oracleTnsConnection";
 import { applyConnectionDeepLinkUpdate, resolveConnectionDeepLinkUpdate } from "@/lib/connection/connectionDeepLinkUpdate";
 import { connectionDeepLinkServiceHydrationValue, parseConnectionDeepLink, parseConnectionDeepLinkUpdate, parseServiceConnectionUrl, type ConnectionDeepLinkDraft, type ConnectionDeepLinkUpdate } from "@/lib/connection/connectionDeepLink";
@@ -3848,6 +3848,7 @@ const showGenericUrlParamsHint = computed(() => form.value.db_type === "mysql" |
 const bareMysqlProfiles = new Set(["doris", "selectdb", "oceanbase"]);
 const supportsMysqlTlsOptions = computed(() => mysqlTlsOptionsSupported(form.value.db_type, selectedType.value));
 const supportsMysqlCleartextPasswordAuth = computed(() => form.value.db_type === "mysql" && !bareMysqlProfiles.has(selectedType.value));
+const supportsIdleTimeoutSetting = computed(() => supportsIdleTimeout(form.value.db_type));
 const supportsDoltSystemTables = computed(() => isDoltDriverProfile(form.value.driver_profile));
 const showDoltSystemTables = computed({
   get: () => doltSystemTablesVisible(form.value),
@@ -6590,6 +6591,15 @@ function clampConnectTimeoutInput(event: Event, target: "global" | "connection")
   else form.value.connect_timeout_secs = MAX_CONNECT_TIMEOUT_SECS;
 }
 
+function clampIdleTimeoutInput(event: Event) {
+  const input = event.target as HTMLInputElement;
+  if (input.value === "") return;
+  const value = Number(input.value);
+  if (!Number.isFinite(value) || value <= MAX_IDLE_TIMEOUT_SECS) return;
+  input.value = String(MAX_IDLE_TIMEOUT_SECS);
+  form.value.idle_timeout_secs = MAX_IDLE_TIMEOUT_SECS;
+}
+
 async function persistGlobalTimeoutDrafts() {
   const nextConnect = normalizeGlobalConnectTimeoutSecs(editGlobalConnectTimeoutSecs.value);
   const nextQuery = normalizeGlobalQueryTimeoutSecs(editGlobalQueryTimeoutSecs.value);
@@ -10279,9 +10289,12 @@ function openExternalUrl(url: string) {
                     </div>
                   </div>
                 </div>
-                <div v-show="form.db_type === 'mongodb'" class="grid grid-cols-4 items-center gap-4">
-                  <Label :class="connectionLabelSmallClass">{{ t("connection.idleTimeout") }}</Label>
-                  <Input v-model.number="form.idle_timeout_secs" type="number" min="0" max="600" step="1" class="col-span-3" />
+                <div v-show="supportsIdleTimeoutSetting" class="grid grid-cols-4 items-start gap-4">
+                  <Label :class="connectionLabelSmallPaddedClass">{{ t("connection.idleTimeout") }}</Label>
+                  <div class="col-span-3 space-y-1">
+                    <Input v-model.number="form.idle_timeout_secs" type="number" min="0" :max="MAX_IDLE_TIMEOUT_SECS" step="1" @input="clampIdleTimeoutInput($event)" />
+                    <p class="text-xs leading-5 text-muted-foreground">{{ t("connection.idleTimeoutHint") }}</p>
+                  </div>
                 </div>
                 <div class="grid grid-cols-4 items-center gap-4">
                   <Label :class="connectionLabelSmallClass">{{ t("connection.keepaliveInterval") }}</Label>
diff --git a/apps/desktop/src/i18n/locales/az.ts b/apps/desktop/src/i18n/locales/az.ts
index f2908f82f1..ae1493543a 100644
--- a/apps/desktop/src/i18n/locales/az.ts
+++ b/apps/desktop/src/i18n/locales/az.ts
@@ -1286,6 +1286,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Aralıq: 0–3600 saniyə. Vaxt limitini ləğv etmək üçün 0 təyin edin.",
     useConnectionQueryTimeout: "Əlaqə",
     idleTimeout: "Boşdayanma vaxt limiti (saniyə)",
+    idleTimeoutHint: "Bağlantı hovuzundakı boşda qalan bağlantıların geri qaytarılmasına tətbiq edilir.",
     keepaliveInterval: "Əlaqənin canlı saxlanma intervalı (saniyə)",
     readOnly: "Yalnız oxuma",
     readOnlyHint: "Bütün yazma əməliyyatlarını blokla (INSERT, UPDATE, DELETE və s.)",
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index bad6f7c4ac..451c6d5abe 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -1631,6 +1631,7 @@ export default {
     globalQueryTimeoutHint: "Range: 0 to 3600 seconds. Set to 0 for no timeout.",
     useConnectionQueryTimeout: "Connection",
     idleTimeout: "Idle Timeout (seconds)",
+    idleTimeoutHint: "Applies to idle connection reclamation within the connection pool.",
     keepaliveInterval: "Keepalive Interval (seconds)",
     readOnly: "Read Only",
     readOnlyHint: "Block all write operations (INSERT, UPDATE, DELETE, etc.)",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index e3f985b6f9..40af272bb6 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -1375,6 +1375,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Rango: de 0 a 3600 segundos. Establece 0 para no aplicar límite.",
     useConnectionQueryTimeout: "Conexión",
     idleTimeout: "Tiempo de espera inactivo (segundos)",
+    idleTimeoutHint: "Se aplica a la recuperación de conexiones inactivas dentro del grupo de conexiones.",
     keepaliveInterval: "Intervalo de keepalive (segundos)",
     readOnly: "Solo lectura",
     readOnlyHint: "Bloquear todas las operaciones de escritura (INSERT, UPDATE, DELETE, etc.)",
diff --git a/apps/desktop/src/i18n/locales/id.ts b/apps/desktop/src/i18n/locales/id.ts
index d0f5dda6f8..3b75874fcb 100644
--- a/apps/desktop/src/i18n/locales/id.ts
+++ b/apps/desktop/src/i18n/locales/id.ts
@@ -1523,6 +1523,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Rentang: 0 hingga 3600 detik. Tetapkan ke 0 untuk tanpa timeout.",
     useConnectionQueryTimeout: "Koneksi",
     idleTimeout: "Timeout Idle (detik)",
+    idleTimeoutHint: "Berlaku untuk pemulihan koneksi idle dalam connection pool.",
     keepaliveInterval: "Interval Keepalive (detik)",
     readOnly: "Read Only",
     readOnlyHint: "Blokir semua operasi tulis (INSERT, UPDATE, DELETE, dll.)",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index 4c8271b460..d866077d4f 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -1297,6 +1297,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Intervallo: da 0 a 3600 secondi. Imposta 0 per nessun limite.",
     useConnectionQueryTimeout: "Connessione",
     idleTimeout: "Timeout Inattività (secondi)",
+    idleTimeoutHint: "Si applica al recupero delle connessioni inattive all'interno del pool di connessioni.",
     keepaliveInterval: "Intervallo keepalive (secondi)",
     readOnly: "Sola lettura",
     readOnlyHint: "Blocca tutte le operazioni di scrittura (INSERT, UPDATE, DELETE, ecc.)",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index b6bdf4bf9b..535ff18ef5 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -1267,6 +1267,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "0～3600 秒の範囲で指定します。0 はタイムアウトなしです。",
     useConnectionQueryTimeout: "接続",
     idleTimeout: "アイドルタイムアウト（秒）",
+    idleTimeoutHint: "コネクションプール内のアイドル接続の回収・解放に適用されます。",
     keepaliveInterval: "Keepalive 間隔（秒）",
     readOnly: "読み取り専用",
     readOnlyHint: "すべての書き込み操作（INSERT, UPDATE, DELETEなど）をブロックします",
diff --git a/apps/desktop/src/i18n/locales/ko.ts b/apps/desktop/src/i18n/locales/ko.ts
index b8048f5cfc..155ab95c91 100644
--- a/apps/desktop/src/i18n/locales/ko.ts
+++ b/apps/desktop/src/i18n/locales/ko.ts
@@ -1452,6 +1452,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "범위: 0~3600초. 0으로 설정하면 제한이 없습니다.",
     useConnectionQueryTimeout: "연결",
     idleTimeout: "유휴 제한 시간 (초)",
+    idleTimeoutHint: "연결 풀 내 유휴 연결의 회수 및 해제에 적용됩니다.",
     keepaliveInterval: "킵얼라이브 간격 (초)",
     readOnly: "읽기 전용",
     readOnlyHint: "모든 쓰기 작업 차단 (INSERT, UPDATE, DELETE 등)",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index 9a2e04527d..f8ba4a0b56 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -1298,6 +1298,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Intervalo: de 0 a 3600 segundos. Defina 0 para não haver limite.",
     useConnectionQueryTimeout: "Conexão",
     idleTimeout: "Timeout de Inatividade (segundos)",
+    idleTimeoutHint: "Aplica-se à recuperação de conexões inativas no pool de conexões.",
     keepaliveInterval: "Intervalo de keepalive (segundos)",
     readOnly: "Somente leitura",
     readOnlyHint: "Bloquear todas as operações de escrita (INSERT, UPDATE, DELETE, etc.)",
diff --git a/apps/desktop/src/i18n/locales/ru.ts b/apps/desktop/src/i18n/locales/ru.ts
index e247bd74b0..32bd07e657 100644
--- a/apps/desktop/src/i18n/locales/ru.ts
+++ b/apps/desktop/src/i18n/locales/ru.ts
@@ -1542,6 +1542,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Диапазон: от 0 до 3600 секунд. Установите 0, чтобы отключить тайм-аут.",
     useConnectionQueryTimeout: "Подключение",
     idleTimeout: "Тайм-аут простоя (секунды)",
+    idleTimeoutHint: "Применяется для освобождения простаивающих соединений в пуле соединений.",
     keepaliveInterval: "Интервал keepalive (секунды)",
     readOnly: "Только чтение",
     readOnlyHint: "Блокировать все операции записи (INSERT, UPDATE, DELETE и т. д.)",
diff --git a/apps/desktop/src/i18n/locales/tr.ts b/apps/desktop/src/i18n/locales/tr.ts
index a763d0d5e0..133d4d0807 100644
--- a/apps/desktop/src/i18n/locales/tr.ts
+++ b/apps/desktop/src/i18n/locales/tr.ts
@@ -1286,6 +1286,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "Aralık: 0 ile 3600 saniye. Zaman aşımı istemiyorsanız 0 yapın.",
     useConnectionQueryTimeout: "Bağlantı",
     idleTimeout: "Boşta Kalma Zaman Aşımı (saniye)",
+    idleTimeoutHint: "Bağlantı havuzundaki boşta kalan bağlantıların geri kazanılması için geçerlidir.",
     keepaliveInterval: "Keepalive Aralığı (saniye)",
     readOnly: "Salt Okunur",
     readOnlyHint: "Tüm yazma işlemlerini engelle (INSERT, UPDATE, DELETE vb.)",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index 10be6c64e1..51378b58b1 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -1570,6 +1570,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "范围为0～3600秒。设为0表示不限制",
     useConnectionQueryTimeout: "当前连接",
     idleTimeout: "空闲超时（秒）",
+    idleTimeoutHint: "作用于连接池内空闲连接的回收释放。",
     keepaliveInterval: "保持连接间隔（秒）",
     readOnly: "只读模式",
     readOnlyHint: "阻止所有写操作（INSERT、UPDATE、DELETE 等）",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index 24e3975dec..0c81eb110e 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -1309,6 +1309,7 @@ export default withEnglishFallback({
     globalQueryTimeoutHint: "範圍為0～3600秒。設為0表示不限制",
     useConnectionQueryTimeout: "目前連線",
     idleTimeout: "閒置逾時（秒）",
+    idleTimeoutHint: "作用於連線池內閒置連線的回收釋放。",
     keepaliveInterval: "保持連線間隔（秒）",
     readOnly: "唯讀模式",
     readOnlyHint: "阻止所有寫入操作（INSERT、UPDATE、DELETE 等）",
diff --git a/apps/desktop/src/lib/__tests__/connection/connectionDialogTimeouts.spec.ts b/apps/desktop/src/lib/__tests__/connection/connectionDialogTimeouts.spec.ts
index c2710e5adc..798c7165ad 100644
--- a/apps/desktop/src/lib/__tests__/connection/connectionDialogTimeouts.spec.ts
+++ b/apps/desktop/src/lib/__tests__/connection/connectionDialogTimeouts.spec.ts
@@ -1,8 +1,42 @@
+import { readFileSync } from "node:fs";
 import { describe, expect, it } from "vitest";
-import { DEFAULT_CONNECT_TIMEOUT_SECS, normalizeConnectTimeoutSecs } from "@/lib/connection/timeoutLimits";
+import { DEFAULT_CONNECT_TIMEOUT_SECS, DEFAULT_IDLE_TIMEOUT_SECS, MAX_IDLE_TIMEOUT_SECS, normalizeConnectTimeoutSecs, normalizeIdleTimeoutSecs, supportsIdleTimeout } from "@/lib/connection/timeoutLimits";
+
+const dialogSource = readFileSync(new URL("../../../components/connection/ConnectionDialog.vue", import.meta.url), "utf8");
 
 describe("ConnectionDialog timeout controls", () => {
   it("restores the default when the connection timeout input is cleared", () => {
     expect(normalizeConnectTimeoutSecs("")).toBe(DEFAULT_CONNECT_TIMEOUT_SECS);
   });
+
+  it("normalizes and bounds idle timeout values", () => {
+    expect(normalizeIdleTimeoutSecs("")).toBe(DEFAULT_IDLE_TIMEOUT_SECS);
+    expect(normalizeIdleTimeoutSecs(Number.NaN)).toBe(DEFAULT_IDLE_TIMEOUT_SECS);
+    expect(normalizeIdleTimeoutSecs(-1)).toBe(DEFAULT_IDLE_TIMEOUT_SECS);
+    expect(normalizeIdleTimeoutSecs(0)).toBe(0);
+    expect(normalizeIdleTimeoutSecs(60)).toBe(60);
+    expect(normalizeIdleTimeoutSecs(120.4)).toBe(120);
+    expect(normalizeIdleTimeoutSecs(5000)).toBe(MAX_IDLE_TIMEOUT_SECS);
+  });
+
+  it("identifies database dialects that support idle connection timeouts", () => {
+    expect(supportsIdleTimeout("mongodb")).toBe(true);
+    expect(supportsIdleTimeout("mysql")).toBe(true);
+    expect(supportsIdleTimeout("doris")).toBe(true);
+    expect(supportsIdleTimeout("starrocks")).toBe(true);
+    expect(supportsIdleTimeout("manticoresearch")).toBe(true);
+
+    expect(supportsIdleTimeout("postgres")).toBe(false);
+    expect(supportsIdleTimeout("sqlite")).toBe(false);
+    expect(supportsIdleTimeout("redis")).toBe(false);
+    expect(supportsIdleTimeout("sqlserver")).toBe(false);
+    expect(supportsIdleTimeout("oracle")).toBe(false);
+    expect(supportsIdleTimeout(undefined)).toBe(false);
+  });
+
+  it("binds idle timeout setting and hint in ConnectionDialog", () => {
+    expect(dialogSource).toContain('v-show="supportsIdleTimeoutSetting"');
+    expect(dialogSource).toContain("clampIdleTimeoutInput($event)");
+    expect(dialogSource).toContain('t("connection.idleTimeoutHint")');
+  });
 });
diff --git a/apps/desktop/src/lib/connection/connectionSubmitNormalization.ts b/apps/desktop/src/lib/connection/connectionSubmitNormalization.ts
index 48118f6aed..c2d6a9ffc6 100644
--- a/apps/desktop/src/lib/connection/connectionSubmitNormalization.ts
+++ b/apps/desktop/src/lib/connection/connectionSubmitNormalization.ts
@@ -1,3 +1,4 @@
+import { normalizeIdleTimeoutSecs } from "@/lib/connection/timeoutLimits";
 import { isSingleDatabase } from "@/lib/database/databaseFeatureSupport";
 import { normalizeGlobalConnectTimeoutSecs, normalizeGlobalQueryTimeoutSecs } from "@/stores/settingsStore";
 import type { ConnectionConfig } from "@/types/database";
@@ -6,8 +7,7 @@ export function normalizeConnectionTimeouts(config: ConnectionConfig, connectTim
   config.connect_timeout_secs = config.connect_timeout_inherit === true ? normalizeGlobalConnectTimeoutSecs(connectTimeoutSecs) : normalizeGlobalConnectTimeoutSecs(config.connect_timeout_secs);
   const queryTimeout = Number(config.query_timeout_secs);
   config.query_timeout_secs = config.query_timeout_inherit === true ? normalizeGlobalQueryTimeoutSecs(queryTimeoutSecs) : normalizeGlobalQueryTimeoutSecs(queryTimeout);
-  const idleTimeout = Number(config.idle_timeout_secs);
-  config.idle_timeout_secs = Number.isFinite(idleTimeout) && idleTimeout >= 0 ? idleTimeout : 60;
+  config.idle_timeout_secs = normalizeIdleTimeoutSecs(config.idle_timeout_secs);
   const keepaliveInterval = Number(config.keepalive_interval_secs);
   config.keepalive_interval_secs = Number.isFinite(keepaliveInterval) && keepaliveInterval >= 0 ? keepaliveInterval : 30;
 }
diff --git a/apps/desktop/src/lib/connection/timeoutLimits.ts b/apps/desktop/src/lib/connection/timeoutLimits.ts
index 288d2cda27..f3c92e0f02 100644
--- a/apps/desktop/src/lib/connection/timeoutLimits.ts
+++ b/apps/desktop/src/lib/connection/timeoutLimits.ts
@@ -1,7 +1,11 @@
+import type { DatabaseType } from "@/types/database";
+
 export const DEFAULT_CONNECT_TIMEOUT_SECS = 10;
 export const MAX_CONNECT_TIMEOUT_SECS = 300;
 export const DEFAULT_QUERY_TIMEOUT_SECS = 60;
 export const MAX_QUERY_TIMEOUT_SECS = 3600;
+export const DEFAULT_IDLE_TIMEOUT_SECS = 60;
+export const MAX_IDLE_TIMEOUT_SECS = 3600;
 
 export function normalizeConnectTimeoutSecs(value: unknown): number {
   if (typeof value !== "number" || !Number.isFinite(value)) return DEFAULT_CONNECT_TIMEOUT_SECS;
@@ -12,3 +16,12 @@ export function normalizeQueryTimeoutSecs(value: unknown): number {
   if (typeof value !== "number" || !Number.isFinite(value)) return DEFAULT_QUERY_TIMEOUT_SECS;
   return Math.min(MAX_QUERY_TIMEOUT_SECS, Math.max(0, Math.round(value)));
 }
+
+export function normalizeIdleTimeoutSecs(value: unknown): number {
+  if (typeof value !== "number" || !Number.isFinite(value) || value < 0) return DEFAULT_IDLE_TIMEOUT_SECS;
+  return Math.min(MAX_IDLE_TIMEOUT_SECS, Math.round(value));
+}
+
+export function supportsIdleTimeout(dbType?: DatabaseType): boolean {
+  return dbType === "mongodb" || dbType === "mysql" || dbType === "doris" || dbType === "starrocks" || dbType === "manticoresearch";
+}