set Xms lower than Xmx

defaults/yacy.init

@@ -621,7 +621,7 @@ cleanup.failedSearchURLtimeout = 86400000
 # if a high performance for large search indexes is wanted, then setting the values to equal number is recommended
 # if YaCy shall be nice in not-only-yacy environments, then the Xms value may be lower
 javastart_Xmx=Xmx600m
-javastart_Xms=Xms600m
+javastart_Xms=Xms90m
 
 # YaCy is able to use RAM copies of database tables. This needs a lot of RAM.
 # To switch on copying of file tables int RAM, there must be enough memory

htroot/PerformanceQueues_p.java

@@ -84,9 +84,9 @@ public class PerformanceQueues_p {
 	            }
         	}
             if (post.containsKey("Xmx")) {
-                int xmx = post.getInt("Xmx", 500); // default maximum heap size
+                int xmx = post.getInt("Xmx", 600); // default maximum heap size
                 if (OS.isWin32) xmx = Math.min(2000, xmx);
-                int xms = xmx; // take all.. if this is not used the os will manage that. if not reserved at the beginning the OS may reject to give away more memory
+                int xms = Math.min(xmx, Math.max(90, xmx / 10));
 	            sb.setConfig("javastart_Xmx", "Xmx" + xmx + "m");
 	            sb.setConfig("javastart_Xms", "Xms" + xms + "m");
 	            prop.put("setStartupCommit", "1");
@@ -342,9 +342,9 @@ public class PerformanceQueues_p {
         prop.put("priority_low",(curr_prio == 20) ? "1" : "0");
 
         // parse initialization memory settings
-        final String Xmx = sb.getConfig("javastart_Xmx", "Xmx500m").substring(3);
+        final String Xmx = sb.getConfig("javastart_Xmx", "Xmx600m").substring(3);
         prop.put("Xmx", Xmx.substring(0, Xmx.length() - 1));
-        final String Xms = sb.getConfig("javastart_Xms", "Xms500m").substring(3);
+        final String Xms = sb.getConfig("javastart_Xms", "Xms90m").substring(3);
         prop.put("Xms", Xms.substring(0, Xms.length() - 1));
 
         final long diskFree = sb.getConfigLong(SwitchboardConstants.DISK_FREE, 3000L);