[ACCUMULO-4036] remove verbose block cache eviction logging

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.7.0
• Fix Version/s: 1.6.5, 1.7.1, 1.8.0
• Component/s: core
• Assignee: Josh Elser
• Reporter: Adam Fuchs
• Created: 21/Oct/15 18:25
• Updated: 31/Dec/15 06:18
• Resolved: 31/Dec/15 06:18

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?