From bc0d3278299a32910108ed5ceeb513a6afea9ce2 Mon Sep 17 00:00:00 2001
From: Chris Jefferson <caj21@st-andrews.ac.uk>
Date: Sat, 1 Jun 2019 19:58:50 +0100
Subject: [PATCH] Change maximum workspace from 2GB to 3/4 of physical memory

---
 src/system.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/system.c b/src/system.c
index 475f1d6f41a..6a606c4090f 100644
--- a/src/system.c
+++ b/src/system.c
@@ -1063,6 +1063,12 @@ void InitSystem (
 #ifdef SYS_IS_64_BIT
     SyStorMin = 128 * 1024L;
     SyStorMax = 2048*1024L;          /* This is in kB! */
+#if defined(HAVE_SYSCONF)
+#if defined(_SC_PAGESIZE) && defined(_SC_PHYS_PAGES)
+    // Set to 3/4 of memory size (in kB)
+    SyStorMax = (sysconf(_SC_PAGESIZE) * sysconf(_SC_PHYS_PAGES) * 3L) / 4 / 1024;
+#endif
+#endif
     SyAllocPool = 4096L*1024*1024;   /* Note this is in bytes! */
 #else
     SyStorMin = 64 * 1024L;