diff -urNp c/agent/mibgroup/hardware/memory/memory_linux.c d/agent/mibgroup/hardware/memory/memory_linux.c
--- c/agent/mibgroup/hardware/memory/memory_linux.c	2019-04-10 14:07:47.375285001 +0200
+++ d/agent/mibgroup/hardware/memory/memory_linux.c	2019-04-12 11:39:11.677314245 +0200
@@ -29,7 +29,7 @@ int netsnmp_mem_arch_load( netsnmp_cache
     ssize_t      bytes_read;
     char        *b;
     unsigned long memtotal = 0,  memfree = 0, memshared = 0,
-                  buffers = 0,   cached = 0,
+                  buffers = 0,   cached = 0, sreclaimable = 0,
                   swaptotal = 0, swapfree = 0;
 
     netsnmp_memory_info *mem;
@@ -126,6 +126,13 @@ int netsnmp_mem_arch_load( netsnmp_cache
         if (first)
             snmp_log(LOG_ERR, "No SwapTotal line in /proc/meminfo\n");
     }
+    b = strstr(buff, "SReclaimable: ");
+    if (b)
+        sscanf(b, "SReclaimable: %lu", &sreclaimable);
+    else {
+        if (first)
+            snmp_log(LOG_ERR, "No SReclaimable line in /proc/meminfo\n");
+    }
     b = strstr(buff, "SwapFree: ");
     if (b)
         sscanf(b, "SwapFree: %lu", &swapfree);
@@ -147,7 +154,7 @@ int netsnmp_mem_arch_load( netsnmp_cache
              mem->descr = strdup("Physical memory");
         mem->units = 1024;
         mem->size  = memtotal;
-        mem->free  = memfree;
+        mem->free  = memfree+buffers+cached+sreclaimable;
         mem->other = -1;
     }
 
@@ -159,7 +166,7 @@ int netsnmp_mem_arch_load( netsnmp_cache
              mem->descr = strdup("Virtual memory");
         mem->units = 1024;
         mem->size  = memtotal+swaptotal;
-        mem->free  = memfree +swapfree;
+        mem->free  = memfree+swapfree+buffers+cached+sreclaimable;
         mem->other = -1;
     }
 
@@ -182,7 +189,7 @@ int netsnmp_mem_arch_load( netsnmp_cache
         if (!mem->descr)
              mem->descr = strdup("Cached memory");
         mem->units = 1024;
-        mem->size  = cached;
+        mem->size  = cached+sreclaimable;
         mem->free  = 0;     /* Report cached size/used as equal */
         mem->other = -1;
     }