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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (ACCUMULO-4036) remove verbose block cache eviction logging
Date Thu, 31 Dec 2015 03:47:49 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-4036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Elser reassigned ACCUMULO-4036:
------------------------------------

    Assignee: Josh Elser

> remove verbose block cache eviction logging
> -------------------------------------------
>
>                 Key: ACCUMULO-4036
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4036
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.7.0
>            Reporter: Adam Fuchs
>            Assignee: Josh Elser
>            Priority: Minor
>             Fix For: 1.6.5, 1.7.1, 1.8.0
>
>
> 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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