/**
* Should only be called by ColumnFamilyStore.apply via Keyspace.apply, which supplies the
* appropriate OpOrdering.
*
* <p>replayPosition should only be null if this is a secondary index, in which case it is
* *expected* to be null
*/
long put(PartitionUpdate update, UpdateTransaction indexer, OpOrder.Group opGroup) {
AtomicBTreePartition previous = partitions.get(update.partitionKey());
long initialSize = 0;
if (previous == null) {
final DecoratedKey cloneKey = allocator.clone(update.partitionKey(), opGroup);
AtomicBTreePartition empty = new AtomicBTreePartition(cfs.metadata, cloneKey, allocator);
// We'll add the columns later. This avoids wasting works if we get beaten in the putIfAbsent
previous = partitions.putIfAbsent(cloneKey, empty);
if (previous == null) {
previous = empty;
// allocate the row overhead after the fact; this saves over allocating and having to free
// after, but
// means we can overshoot our declared limit.
int overhead = (int) (cloneKey.getToken().getHeapSize() + ROW_OVERHEAD_HEAP_SIZE);
allocator.onHeap().allocate(overhead, opGroup);
initialSize = 8;
} else {
allocator.reclaimer().reclaimImmediately(cloneKey);
}
}
long[] pair = previous.addAllWithSizeDelta(update, opGroup, indexer);
minTimestamp = Math.min(minTimestamp, previous.stats().minTimestamp);
liveDataSize.addAndGet(initialSize + pair[0]);
columnsCollector.update(update.columns());
statsCollector.update(update.stats());
currentOperations.addAndGet(update.operationCount());
return pair[1];
}
public String toString() {
return String.format(
"Memtable-%s@%s(%s serialized bytes, %s ops, %.0f%%/%.0f%% of on/off-heap limit)",
cfs.name,
hashCode(),
FBUtilities.prettyPrintMemory(liveDataSize.get()),
currentOperations,
100 * allocator.onHeap().ownershipRatio(),
100 * allocator.offHeap().ownershipRatio());
}
@VisibleForTesting
public void setDiscarding(
OpOrder.Barrier writeBarrier, AtomicReference<ReplayPosition> lastReplayPosition) {
assert this.writeBarrier == null;
this.commitLogUpperBound = lastReplayPosition;
this.writeBarrier = writeBarrier;
allocator.setDiscarding();
}
private static int estimateRowOverhead(final int count) {
// calculate row overhead
try (final OpOrder.Group group = new OpOrder().start()) {
int rowOverhead;
MemtableAllocator allocator = MEMORY_POOL.newAllocator();
ConcurrentNavigableMap<PartitionPosition, Object> partitions = new ConcurrentSkipListMap<>();
final Object val = new Object();
for (int i = 0; i < count; i++)
partitions.put(
allocator.clone(
new BufferDecoratedKey(new LongToken(i), ByteBufferUtil.EMPTY_BYTE_BUFFER), group),
val);
double avgSize = ObjectSizes.measureDeep(partitions) / (double) count;
rowOverhead =
(int) ((avgSize - Math.floor(avgSize)) < 0.05 ? Math.floor(avgSize) : Math.ceil(avgSize));
rowOverhead -= ObjectSizes.measureDeep(new LongToken(0));
rowOverhead += AtomicBTreePartition.EMPTY_SIZE;
allocator.setDiscarding();
allocator.setDiscarded();
return rowOverhead;
}
}
public boolean isLive() {
return allocator.isLive();
}
void setDiscarded() {
allocator.setDiscarded();
}
