diff --git a/src/Interpreters/ThreadStatusExt.cpp b/src/Interpreters/ThreadStatusExt.cpp
index d1d206009c5..62c328e2fde 100644
--- a/src/Interpreters/ThreadStatusExt.cpp
+++ b/src/Interpreters/ThreadStatusExt.cpp
@@ -35,6 +35,27 @@ void ThreadStatus::attachQueryContext(Context & query_context_)
 {
     query_context = &query_context_;
     query_id = query_context->getCurrentQueryId();
+
+    const Settings & settings = query_context->getSettingsRef();
+
+    untracked_memory_limit = settings.max_untracked_memory;
+    if (settings.memory_profiler_step && settings.memory_profiler_step < UInt64(untracked_memory_limit))
+        untracked_memory_limit = settings.memory_profiler_step;
+
+#if defined(OS_LINUX)
+    /// Set "nice" value if required.
+    Int32 new_os_thread_priority = settings.os_thread_priority;
+    if (new_os_thread_priority && hasLinuxCapability(CAP_SYS_NICE))
+    {
+        LOG_TRACE(log, "Setting nice to {}", new_os_thread_priority);
+
+        if (0 != setpriority(PRIO_PROCESS, thread_id, new_os_thread_priority))
+            throwFromErrno("Cannot 'setpriority'", ErrorCodes::CANNOT_SET_THREAD_PRIORITY);
+
+        os_thread_priority = new_os_thread_priority;
+    }
+#endif
+
     if (!global_context)
         global_context = &query_context->getGlobalContext();