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HCOLL-143 print a warning on attempt of creation too large ChronicleMap or ChronicleSet on Windows

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This commit is contained in:
leventov
2014-12-17 20:18:54 +07:00
parent 7c25596870
commit 0cc07a6a91
3 changed files with 64 additions and 1 deletions
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src/main/java/net/openhft/chronicle/map/ChronicleMapBuilder.java
+3 -1
View File
@@ -1172,6 +1172,7 @@ public final class ChronicleMapBuilder<K, V> implements Cloneable,
try {
pushingToMapEventListener();
VanillaChronicleMap<K, ?, ?, V, ?, ?> map = newMap(singleHashReplication, channel);
map.warnOnWindows();
BytesStore bytesStore = new DirectStore(JDKObjectSerializer.INSTANCE,
map.sizeInBytes(), true);
map.createMappedStoreAndSegments(bytesStore);
@@ -1209,7 +1210,8 @@ public final class ChronicleMapBuilder<K, V> implements Cloneable,
}
private VanillaChronicleMap<K, ?, ?, V, ?, ?> newMap(
SingleChronicleHashReplication singleHashReplication, ReplicationChannel channel) throws IOException {
SingleChronicleHashReplication singleHashReplication, ReplicationChannel channel)
throws IOException {
boolean replicated = singleHashReplication != null || channel != null;
preMapConstruction(replicated);
if (replicated) {
src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
+31
View File
@@ -32,6 +32,7 @@ import net.openhft.chronicle.hash.serialization.BytesInterop;
import net.openhft.chronicle.hash.serialization.BytesReader;
import net.openhft.chronicle.hash.serialization.SizeMarshaller;
import net.openhft.chronicle.hash.serialization.internal.*;
import net.openhft.lang.Jvm;
import net.openhft.lang.collection.DirectBitSet;
import net.openhft.lang.collection.SingleThreadedDirectBitSet;
import net.openhft.lang.io.*;
@@ -237,7 +238,37 @@ class VanillaChronicleMap<K, KI, MKI extends MetaBytesInterop<K, ? super KI>,
return offset;
}
void warnOnWindows() {
if (!Jvm.isWindows())
return;
long offHeapMapSize = sizeInBytes();
long oneGb = GIGABYTES.toBytes(1L);
double offHeapMapSizeInGb = offHeapMapSize * 1.0 / oneGb;
if (offHeapMapSize > GIGABYTES.toBytes(4L)) {
System.out.printf(
"WARNING: On Windows, you probably cannot create a ChronicleMap\n" +
"of more than 4 GB. The configured map requires %.2f GB of off-heap memory.\n",
offHeapMapSizeInGb);
}
try {
long freePhysicalMemory = Jvm.freePhysicalMemoryOnWindowsInBytes();
if (offHeapMapSize > freePhysicalMemory * 0.9) {
double freePhysicalMemoryInGb = freePhysicalMemory * 1.0 / oneGb;
System.out.printf(
"WARNING: On Windows, you probably cannot create a ChronicleMap\n" +
"of more than 90%% of available free memory in the system.\n" +
"The configured map requires %.2f GB of off-heap memory.\n" +
"There is only %.2f GB of free physical memory in the system.\n",
offHeapMapSizeInGb, freePhysicalMemoryInGb);
}
} catch (IOException e) {
// ignore -- anyway we just warn the user
}
}
final long createMappedStoreAndSegments(File file) throws IOException {
warnOnWindows();
return createMappedStoreAndSegments(new MappedStore(file, FileChannel.MapMode.READ_WRITE,
sizeInBytes(), JDKObjectSerializer.INSTANCE));
}