[jira] [Updated] (CASSANDRA-18400) Nodetool info should report on the new networking cache

["Ningzi Zhan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-18400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ningzi Zhan updated CASSANDRA-18400:
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    Attachment: Screen Shot 2023-05-18 at 13.57.45.png

> 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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