82635d4b59
After all LRU Cache inherits from LRUCachePolicy, this will allow prune stale entry, eviction when memory exceeds limit, and define common properties. LRUCache constructor change to private, only allow LRUCachePolicy to construct it. Impl DummyLRUCache, when LRU Cache capacity is 0, will no longer be meaningless insert and evict.
86 lines
3.5 KiB
C++
86 lines
3.5 KiB
C++
// Licensed to the Apache Software Foundation (ASF) 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. The ASF licenses this file
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// 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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#include "olap/page_cache.h"
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#include <glog/logging.h>
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#include <ostream>
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#include "runtime/exec_env.h"
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namespace doris {
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StoragePageCache* StoragePageCache::create_global_cache(size_t capacity,
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int32_t index_cache_percentage,
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int64_t pk_index_cache_capacity,
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uint32_t num_shards) {
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StoragePageCache* res = new StoragePageCache(capacity, index_cache_percentage,
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pk_index_cache_capacity, num_shards);
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return res;
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}
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StoragePageCache::StoragePageCache(size_t capacity, int32_t index_cache_percentage,
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int64_t pk_index_cache_capacity, uint32_t num_shards)
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: _index_cache_percentage(index_cache_percentage) {
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if (index_cache_percentage == 0) {
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_data_page_cache = std::make_unique<DataPageCache>(capacity, num_shards);
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} else if (index_cache_percentage == 100) {
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_index_page_cache = std::make_unique<IndexPageCache>(capacity, num_shards);
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} else if (index_cache_percentage > 0 && index_cache_percentage < 100) {
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_data_page_cache = std::make_unique<DataPageCache>(
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capacity * (100 - index_cache_percentage) / 100, num_shards);
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_index_page_cache = std::make_unique<IndexPageCache>(
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capacity * index_cache_percentage / 100, num_shards);
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} else {
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CHECK(false) << "invalid index page cache percentage";
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}
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_pk_index_page_cache = std::make_unique<PKIndexPageCache>(pk_index_cache_capacity, num_shards);
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}
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bool StoragePageCache::lookup(const CacheKey& key, PageCacheHandle* handle,
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segment_v2::PageTypePB page_type) {
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auto cache = _get_page_cache(page_type);
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auto lru_handle = cache->lookup(key.encode());
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if (lru_handle == nullptr) {
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return false;
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}
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*handle = PageCacheHandle(cache, lru_handle);
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handle->update_last_visit_time();
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return true;
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}
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void StoragePageCache::insert(const CacheKey& key, DataPage* data, PageCacheHandle* handle,
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segment_v2::PageTypePB page_type, bool in_memory) {
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auto deleter = [](const doris::CacheKey& key, void* value) {
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DataPage* cache_value = (DataPage*)value;
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delete cache_value;
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};
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CachePriority priority = CachePriority::NORMAL;
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if (in_memory) {
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priority = CachePriority::DURABLE;
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}
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auto cache = _get_page_cache(page_type);
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auto lru_handle = cache->insert(key.encode(), data, data->capacity(), deleter, priority);
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*handle = PageCacheHandle(cache, lru_handle);
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handle->update_last_visit_time();
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}
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} // namespace doris
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