[infinispan-issues] [JBoss JIRA] Created: (ISPN-663) Eviction with passivation using JdbmCacheStore is 100 times slower in 4.1 vs 4.0

[Paul Nardone (JIRA)]

Eviction with passivation using JdbmCacheStore is 100 times slower in 4.1 vs 4.0
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                 Key: ISPN-663
                 URL: https://jira.jboss.org/browse/ISPN-663
             Project: Infinispan
          Issue Type: Bug
          Components: Eviction, Loaders and Stores
    Affects Versions: 4.1.0.Final
         Environment: Win32 JRE 1.6.0_21
            Reporter: Paul Nardone
            Assignee: Manik Surtani
         Attachments: InfinispanPassivationTest.java

Eviction with passivation enabled using the JdbmCacheStore appears to be significantly slower in 4.1.0.FINAL vs 4.0.0.FINAL.

The degredation in performance is so signficant to make it impossible  to use

The  performance issue seems to due as the JdbmCacheStore synching the filesystem via FileDescriptor.sync() or similar which occurs during every object passivation and each passivation occurs as a new object is added beyond the EvictionMaxEntries capacity.

The attached test inserts 1000 values into two caches


Both caches use a JdbmCacheStore and  LRU


PASSIVATIONLRU10 runs with cache with EvictionMaxEntries  10
PASSIVATIONLRU1000 runs with cache with EvictionMaxEntries  1000



4.1.0.FINAL

PASSIVATIONLRU10 Time Taken : 51704
PASSIVATIONLRU1000 Time Taken : 4484



4.0.0.FINAL
PASSIVATIONLRU10 Time Taken : 281
PASSIVATIONLRU1000 Time Taken : 141


4.2.0.ALPHA2
PASSIVATIONLRU10 Time Taken : 51047
PASSIVATIONLRU1000 Time Taken : 5156



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