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Add a comment on ChronicleMapBuilder.MAX_SEGMENTS choice

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leventov
2015-10-02 11:37:18 +03:00
parent 228f29d4b5
commit f70d8b262a
1 changed files with 8 additions and 0 deletions
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src/main/java/net/openhft/chronicle/map/ChronicleMapBuilder.java
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@@ -112,6 +112,14 @@ public final class ChronicleMapBuilder<K, V> implements
static final byte UDP_REPLICATION_MODIFICATION_ITERATOR_ID = (byte) 127;
private static final int DEFAULT_KEY_OR_VALUE_SIZE = 120;
private static final long DEFAULT_ENTRIES = 1 << 20;
/**
* If want to increase this number, note {@link OldDeletedEntriesCleanup} uses array to store
* all segment indexes -- so it could be current JVM max array size, not Integer.MAX_VALUE
* (which is an obvious limitation, as many APIs and internals use int type for representing
* segment index).
*
* Anyway, unlikely anyone ever need more than 1 billion segments.
*/
private static final int MAX_SEGMENTS = (1 << 30);
private static final Logger LOG =
LoggerFactory.getLogger(ChronicleMapBuilder.class.getName());