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From Damien Dudognon <damien.dudog...@ebuzzing.com>
Subject Re: Replication lag after cache optimizations
Date Wed, 05 Sep 2012 09:00:14 GMT
Thanks for all the information.

> I'm not sure how exactly you are measuring/defining "replication lag" but 
> if you mean "lag in how long until the newly replicated documents are 
> visible in searches"

That is exactly what I wanted to say.

I've attached the cache statistics.

If you are interested in, a few more details on our use case :
Actually, we have only few hits on Solr (about 2 req/s) but we will quickly have more than
50 req/s. The requests are mainly facet requests. The index counts about 1,5M documents and
we plan a size of 15M documents in one year.

Best regards,
Damien

----------------
CACHE
----------------
name: 	 queryResultCache  
class: 	 org.apache.solr.search.FastLRUCache  
version: 	 1.0  
description: 	 Concurrent LRU Cache(maxSize=16384, initialSize=4096, minSize=14745, acceptableSize=15564,
cleanupThread=false, autowarmCount=1024, regenerator=org.apache.solr.search.SolrIndexSearcher$3@3d762027)
 
stats: 	lookups : 4 
hits : 4 
hitratio : 1.00 
inserts : 0 
evictions : 0 
size : 1024 
warmupTime : 20 
cumulative_lookups : 1003454 
cumulative_hits : 894365 
cumulative_hitratio : 0.89 
cumulative_inserts : 120343 
cumulative_evictions : 0 

name: 	 fieldCache  
class: 	 org.apache.solr.search.SolrFieldCacheMBean  
insanity_count : 0 
name: 	 documentCache  
class: 	 org.apache.solr.search.FastLRUCache  
version: 	 1.0  
description: 	 Concurrent LRU Cache(maxSize=16384, initialSize=4096, minSize=14745, acceptableSize=15564,
cleanupThread=false, autowarmCount=1024, regenerator=null)  
stats: 	lookups : 80 
hits : 60 
hitratio : 0.75 
inserts : 20 
evictions : 0 
size : 20 
warmupTime : 0 
cumulative_lookups : 10844723 
cumulative_hits : 8318341 
cumulative_hitratio : 0.76 
cumulative_inserts : 2526382 
cumulative_evictions : 0 

name: 	 fieldValueCache  
class: 	 org.apache.solr.search.FastLRUCache  
version: 	 1.0  
description: 	 Concurrent LRU Cache(maxSize=16384, initialSize=16384, minSize=14745, acceptableSize=15564,
cleanupThread=false, autowarmCount=1024, regenerator=org.apache.solr.search.SolrIndexSearcher$1@38bdc9b3)
 
stats: 	lookups : 2 
hits : 2 
hitratio : 1.00 
inserts : 0 
evictions : 0 
size : 1 
warmupTime : 1369 
cumulative_lookups : 485281 
cumulative_hits : 485276 
cumulative_hitratio : 0.99 
cumulative_inserts : 2 
cumulative_evictions : 0 
item_tags : {field=tags,memSize=5804302,tindexSize=36148,time=1369,phase1=1357,nTerms=118241,bigTerms=0,termInstances=448772,uses=2}


name: 	 filterCache  
class: 	 org.apache.solr.search.FastLRUCache  
version: 	 1.0  
description: 	 Concurrent LRU Cache(maxSize=16384, initialSize=4096, minSize=14745, acceptableSize=15564,
cleanupThread=false, autowarmCount=1024, regenerator=org.apache.solr.search.SolrIndexSearcher$2@340523df)
 
stats: 	lookups : 21 
hits : 21 
hitratio : 1.00 
inserts : 0 
evictions : 0 
size : 1024 
warmupTime : 1305 
cumulative_lookups : 5956615 
cumulative_hits : 5868136 
cumulative_hitratio : 0.98 
cumulative_inserts : 88479 
cumulative_evictions : 0
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