From ff1f5c0f48c761ed5be4b99b50dd4ae24bc39582 Mon Sep 17 00:00:00 2001
From: Otto <otto.moerbeek@open-xchange.com>
Date: Wed, 10 Mar 2021 11:45:02 +0100
Subject: [PATCH] "data" size is unreliable, start using RES, as it seem
 reliable and relevant

---
 pdns/misc.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pdns/misc.cc b/pdns/misc.cc
index de9e003eb9..dc21e6d9c3 100644
--- a/pdns/misc.cc
+++ b/pdns/misc.cc
@@ -1270,7 +1270,9 @@ uint64_t getRealMemoryUsage(const std::string&)
   uint64_t size, resident, shared, text, lib, data;
   ifs >> size >> resident >> shared >> text >> lib >> data;
 
-  return data * getpagesize();
+  // We used to use "data" here, but it proves unreliable and even is marked "broken"
+  // in https://www.kernel.org/doc/html/latest/filesystems/proc.html 
+  return resident * getpagesize();
 #else
   struct rusage ru;
   if (getrusage(RUSAGE_SELF, &ru) != 0)
-- 
2.47.2