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From "Adam Fuchs (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-4036) remove verbose block cache eviction logging
Date Wed, 21 Oct 2015 18:25:28 GMT
Adam Fuchs created ACCUMULO-4036:
------------------------------------

             Summary: remove verbose block cache eviction logging
                 Key: ACCUMULO-4036
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4036
             Project: Accumulo
          Issue Type: Bug
          Components: core
    Affects Versions: 1.7.0
            Reporter: Adam Fuchs


For many scans and queries we get logs like the following at pretty extreme frequencies:
{code}
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)
{code}

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?



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