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https://issues.apache.org/jira/browse/CASSANDRA-18400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17724351#comment-17724351
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Brandon Williams edited comment on CASSANDRA-18400 at 5/19/23 6:42 PM:
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was (Author: brandon.williams):
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> Nodetool info should report on the new networking cache
> -------------------------------------------------------
>
> Key: CASSANDRA-18400
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18400
> Project: Cassandra
> Issue Type: Improvement
> Components: Tool/nodetool
> Reporter: Brad Schoening
> Assignee: Ningzi Zhan
> Priority: Normal
> Fix For: 4.0.x, 4.1.x, 5.x
>
> Attachments: Screen Shot 2023-05-18 at 13.57.45.png
>
>
> CASSANDRA-15229 separated the chunk and network cache, creating a new
> network_cache_size parameter.
> However, *nodetool info* does not report the in-use size of this cache or a
> hit ratio as it does for key, row, counter and chunk cache.
> {quote}Exceptions : 4
> Key Cache : entries 2852, size 297.59 KiB, capacity 100 MiB, 2406561 hits,
> 2409424 requests, 0.999 recent hit rate, 14400 save period in seconds
> Row Cache : entries 0, size 0 bytes, capacity 0 bytes, 0 hits, 0 requests,
> NaN recent hit rate, 0 save period in seconds
> Counter Cache : entries 0, size 0 bytes, capacity 50 MiB, 0 hits, 0 requests,
> NaN recent hit rate, 7200 save period in seconds
> Chunk Cache : entries 1118, size 55.02 MiB, capacity 992 MiB, 4695794 misses,
> 7179421 requests, 0.346 recent hit rate, 24.145 microseconds miss latency
> Percent Repaired : 0.0%
> {quote}
> However, when its full, it will be logged:
> {quote}[INFO ] [epollEventLoopGroup-5-12] cluster_id=1 ip_address=127.1.1.1
> NoSpamLogger.java:92 - Maximum memory usage reached (128.000MiB), cannot
> allocate chunk of 8.000MiB
> {quote}
> It should report a line similar to the above:
> {quote}Network Cache : entries ?, size ? MiB, capacity ? MiB, ? misses, ?
> requests, ? recent hit rate
> {quote}
> Also, not sure why the above show NaN for row and counter cache, is there is
> a divide by zero error when the entries are zero?
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