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[opt](meta-cache) refine the meta cache (#33449) - #33754
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1. Use `caffeine` instead of `guava cache` to get better performace 2. Add a new class `CacheFactory` All (Async)LoadingCache should be built from `CacheFactory` 3. Use separator executor for different caches 1. rowCountRefreshExecutor For row count cache. Row count cache is an async loading cache, and we can ignore the result if cache missing or thread pool is full. So use a separate executor for this cache. 2. commonRefreshExecutor For other caches. Other caches are sync loading cache. But commonRefreshExecutor will be used for async refresh. That is, if cache entry is missing, the cache value will be loaded in caller thread, sychronously. if cache entry need refresh, it will be reloaded in commonRefreshExecutor. 3. fileListingExecutor File listing is a heavy operation, so use a separate executor for it. For fileCache, the refresh operation will still use commonRefreshExecutor to trigger refresh. And fileListingExecutor will be used to list file. 4. Change the refresh and expire logic of caches For most of caches, set `refreshAfterWrite` strategy, so that even if the cache entry is expired, the old entry can still be used while new entry is being loaded. 5. Add new global variable `enable_get_row_count_from_file_list` Default is true, if false, will disable getting row count from file list
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Apr 17, 2024
Thank you for your contribution to Apache Doris. Since 2024-03-18, the Document has been moved to doris-website. |
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bp #33449