Skysheepwang commented on a change in pull request #5008:
URL: https://github.com/apache/incubator-doris/pull/5008#discussion_r542993632
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File path: be/src/olap/page_cache.cpp
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@@ -21,35 +21,48 @@ namespace doris {
StoragePageCache* StoragePageCache::_s_instance = nullptr;
-void StoragePageCache::create_global_cache(size_t capacity) {
+void StoragePageCache::create_global_cache(size_t capacity, int32_t
index_cache_percentage) {
DCHECK(_s_instance == nullptr);
- static StoragePageCache instance(capacity);
+ static StoragePageCache instance(capacity, index_cache_percentage);
_s_instance = &instance;
}
-StoragePageCache::StoragePageCache(size_t capacity)
- : _cache(new_lru_cache("StoragePageCache", capacity)) {}
+StoragePageCache::StoragePageCache(size_t capacity, int32_t
index_cache_percentage)
+ : _index_cache_percentage(index_cache_percentage) {
+ if (index_cache_percentage == 0) {
+ _data_page_cache =
std::unique_ptr<Cache>(new_lru_cache("DataPageCache", capacity));
+ } else if (index_cache_percentage == 100) {
+ _index_page_cache =
std::unique_ptr<Cache>(new_lru_cache("IndexPageCache", capacity));
+ } else if (index_cache_percentage > 0 && index_cache_percentage < 100) {
+ _data_page_cache =
std::unique_ptr<Cache>(new_lru_cache("DataPageCache", capacity * (100 -
index_cache_percentage) / 100));
+ _index_page_cache =
std::unique_ptr<Cache>(new_lru_cache("IndexPageCache", capacity *
index_cache_percentage / 100));
+ } else {
+ CHECK(false) << "invalid index page cache percentage";
+ }
+}
-bool StoragePageCache::lookup(const CacheKey& key, PageCacheHandle* handle) {
- auto lru_handle = _cache->lookup(key.encode());
+bool StoragePageCache::lookup(const CacheKey& key, PageCacheHandle* handle,
segment_v2::PageTypePB page_type) {
+ auto cache = _get_page_cache(page_type);
Review comment:
Actually not because the `is_cache_available()` check will be called
before using the `lookup()` method.
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