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4271d573d6
Refactor cache recycling so that it only caches large arrays (pages) that can
later be used to build more complex data-structures such as hash tables.
- QueueRecycler now takes a limit like other non-trivial recyclers.
- New PageCacheRecycler (inspired of CacheRecycler) has the ability to cache
byte[], int[], long[], double[] or Object[] arrays using a fixed amount of
memory (either globally or per-thread depending on the Recycler impl, eg.
queue is global while thread_local is per-thread).
- Paged arrays in o.e.common.util can now optionally take a PageCacheRecycler
to reuse existing pages.
- All aggregators' data-structures now use PageCacheRecycler:
- for all arrays (counts, mins, maxes, ...)
- LongHash can now take a PageCacheRecycler
- there is a new BytesRefHash (inspired from Lucene but quite different,
still; for instance it cheats on BytesRef comparisons by using Unsafe)
that also takes a PageCacheRecycler
Close #4557
44 lines
1.4 KiB
Java
44 lines
1.4 KiB
Java
/*
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* Licensed to ElasticSearch and Shay Banon under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. ElasticSearch licenses this
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* file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.common.util;
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import org.elasticsearch.cache.recycler.PageCacheRecycler;
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import org.elasticsearch.common.lease.Releasable;
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abstract class AbstractArray implements Releasable {
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public final PageCacheRecycler recycler;
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public final boolean clearOnResize;
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private boolean released = false;
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AbstractArray(PageCacheRecycler recycler, boolean clearOnResize) {
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this.recycler = recycler;
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this.clearOnResize = clearOnResize;
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}
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@Override
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public boolean release() {
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assert !released : "double release";
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released = true;
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return true; // nothing to release by default
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}
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}
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