/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.memory;
import com.facebook.presto.spi.memory.MemoryPoolId;
import com.facebook.presto.spi.memory.MemoryPoolInfo;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import io.airlift.units.DataSize;
import javax.inject.Inject;
import java.util.List;
import java.util.Map;
import static com.facebook.presto.memory.NodeMemoryConfig.QUERY_MAX_MEMORY_PER_NODE_CONFIG;
import static com.google.common.base.Preconditions.checkArgument;
import static io.airlift.units.DataSize.Unit.BYTE;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
public final class LocalMemoryManager
{
public static final MemoryPoolId GENERAL_POOL = new MemoryPoolId("general");
public static final MemoryPoolId RESERVED_POOL = new MemoryPoolId("reserved");
public static final MemoryPoolId SYSTEM_POOL = new MemoryPoolId("system");
private final DataSize maxMemory;
private final Map<MemoryPoolId, MemoryPool> pools;
@Inject
public LocalMemoryManager(NodeMemoryConfig config, ReservedSystemMemoryConfig systemMemoryConfig)
{
requireNonNull(config, "config is null");
requireNonNull(systemMemoryConfig, "systemMemoryConfig is null");
long maxHeap = Runtime.getRuntime().maxMemory();
checkArgument(systemMemoryConfig.getReservedSystemMemory().toBytes() < maxHeap, "Reserved memory %s is greater than available heap %s", systemMemoryConfig.getReservedSystemMemory(), new DataSize(maxHeap, BYTE));
maxMemory = new DataSize(maxHeap - systemMemoryConfig.getReservedSystemMemory().toBytes(), BYTE);
ImmutableMap.Builder<MemoryPoolId, MemoryPool> builder = ImmutableMap.builder();
checkArgument(config.getMaxQueryMemoryPerNode().toBytes() < maxMemory.toBytes(), format("%s set to %s, but only %s of useable heap available", QUERY_MAX_MEMORY_PER_NODE_CONFIG, config.getMaxQueryMemoryPerNode(), maxMemory));
builder.put(RESERVED_POOL, new MemoryPool(RESERVED_POOL, config.getMaxQueryMemoryPerNode()));
DataSize generalPoolSize = new DataSize(Math.max(0, maxMemory.toBytes() - config.getMaxQueryMemoryPerNode().toBytes()), BYTE);
builder.put(GENERAL_POOL, new MemoryPool(GENERAL_POOL, generalPoolSize));
builder.put(SYSTEM_POOL, new MemoryPool(SYSTEM_POOL, systemMemoryConfig.getReservedSystemMemory()));
this.pools = builder.build();
}
public MemoryInfo getInfo()
{
ImmutableMap.Builder<MemoryPoolId, MemoryPoolInfo> builder = ImmutableMap.builder();
for (Map.Entry<MemoryPoolId, MemoryPool> entry : pools.entrySet()) {
builder.put(entry.getKey(), entry.getValue().getInfo());
}
return new MemoryInfo(maxMemory, builder.build());
}
public List<MemoryPool> getPools()
{
return ImmutableList.copyOf(pools.values());
}
public MemoryPool getPool(MemoryPoolId id)
{
return pools.get(id);
}
}