Minor Description
For many scans and queries we get logs like the following at pretty extreme frequencies:
2015-10-20 17:33:50,458 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578760 bytes 2015-10-20 17:33:50,458 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643840 bytes. Priority Sizes: Single=7.152191MB (7499616), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,465 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578576 bytes 2015-10-20 17:33:50,465 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643584 bytes. Priority Sizes: Single=7.249962MB (7602136), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,470 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578616 bytes 2015-10-20 17:33:50,470 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643872 bytes. Priority Sizes: Single=7.2499924MB (7602168), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,477 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578344 bytes 2015-10-20 17:33:50,477 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643808 bytes. Priority Sizes: Single=7.1517944MB (7499200), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,483 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578408 bytes 2015-10-20 17:33:50,483 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643648 bytes. Priority Sizes: Single=7.1518555MB (7499264), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,488 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578408 bytes 2015-10-20 17:33:50,488 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643672 bytes. Priority Sizes: Single=7.1518555MB (7499264), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,494 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578560 bytes 2015-10-20 17:33:50,494 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643472 bytes. Priority Sizes: Single=7.1520004MB (7499416), Multi=5.60128MB (5873368),Memory=0.0MB (0) 2015-10-20 17:33:50,500 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction started. Attempting to free 1578872 bytes 2015-10-20 17:33:50,500 [cache.LruBlockCache] [LruBlockCache.EvictionThread] DEBUG: Block cache LRU eviction completed. Freed 1643840 bytes. Priority Sizes: Single=7.152298MB (7499728), Multi=5.60128MB (5873368),Memory=0.0MB (0)
In this case, it's a message every few milliseconds. Does anybody need these log messages? If so, could/should they be rolled up into stats other than our cache hit stats?
