Isaac Reath created CASSANDRA-20864:
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Summary: Expose Prepared Statement Cache Size Metric (in bytes)
Key: CASSANDRA-20864
URL: https://issues.apache.org/jira/browse/CASSANDRA-20864
Project: Apache Cassandra
Issue Type: Improvement
Components: Observability/Metrics
Reporter: Isaac Reath
Assignee: Isaac Reath
Currently, Cassandra exposes the count of prepared statements through a metric,
PreparedStatementsCount. However, the maximum cache size is configured in terms
of bytes through the configuration prepared_statements_cache_size, creating a
mismatch between the exposed metrics and the configuration units. This
discrepancy makes it difficult for operators to anticipate when the cache is
approaching its configured limit. The scope of this ticket is to add a new
metric, PreparedStatementsCacheSize, which will expose the size of the cache in
bytes to improve the observability of the size of the prepared statement cache.
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