From 8b69a9fe05437f3729240cf44b02dfbb1293a119 Mon Sep 17 00:00:00 2001
From: George Hazan <ghazan@miranda.im>
Date: Fri, 13 Apr 2018 16:52:21 +0300
Subject: 64-bit Miranda to use 16 GB mmap

---
 plugins/Dbx_mdbx/src/dbintf.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'plugins')

diff --git a/plugins/Dbx_mdbx/src/dbintf.cpp b/plugins/Dbx_mdbx/src/dbintf.cpp
index 3c00631639..23d332ad8a 100644
--- a/plugins/Dbx_mdbx/src/dbintf.cpp
+++ b/plugins/Dbx_mdbx/src/dbintf.cpp
@@ -215,10 +215,16 @@ STDMETHODIMP_(void) CDbxMDBX::SetCacheSafetyMode(BOOL bIsSet)
 
 int CDbxMDBX::Map()
 {
+	#ifdef _WIN64
+		__int64 upperLimit = 0x400000000ul;
+	#else
+		intptr_t upperLimit = 512ul << 20;
+	#endif
+
 	int rc = mdbx_env_set_geometry(m_env,
 		         -1,   // minimal lower limit
 		  1ul << 20,   // at least 1M for now
-		512ul << 20,	// 512M upper size
+		 upperLimit,	// 512M upper size
 		  1ul << 20,   // 1M growth step
 		512ul << 10,   // 512K shrink threshold
 		         -1);  // default page size
-- 
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