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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4150) Looks like Maximum amount of cache available in 1.1 is 2 GB
Date Wed, 16 May 2012 16:57:02 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276879#comment-13276879
] 

Jonathan Ellis commented on CASSANDRA-4150:
-------------------------------------------

{code}
.       EntryWeigher<KeyCacheKey, RowIndexEntry> weigher = new EntryWeigher<KeyCacheKey,
RowIndexEntry>()
        {
            public int weightOf(KeyCacheKey key, RowIndexEntry value)
            {
                return key.serializedSize() + value.serializedSize();
            }
        };
        ICache<KeyCacheKey, RowIndexEntry> kc = ConcurrentLinkedHashCache.create(keyCacheInMemoryCapacity,
weigher);
{code}

Using the serialized size for a non-serialized cache looks fishy to me.
                
> Looks like Maximum amount of cache available in 1.1 is 2 GB
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-4150
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4150
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.1.0
>            Reporter: Vijay
>            Assignee: Vijay
>         Attachments: 0001-CASSANDRA-4139-v2.patch, 0001-CASSANDRA-4150.patch, 0002-Use-EntryWeigher-for-HeapCache.patch,
0002-add-bytes-written-metric-v2.patch, concurrentlinkedhashmap-lru-1.3.jar
>
>
> The problem is that capacity is a Integer which can maximum hold 2 GB,
> I will post a fix to CLHM in the mean time we might want to remove the maximumWeightedCapacity
code path (atleast for Serializing cache) and implement it in our code.

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