Hi all, A broker with a lot of topics (10k+) consumes a considerable amount of CPU even while idling (no messages being processed).
In profiling, I can see that most CPU is spent in ManagedLedgerFactorImpl.doCacheEviction. It's also a major source of object allocations (when a broker is idling). A similar observation was made by Kirill K about a month ago. There is a configuration parameter called managedLedgerCacheEvictionFrequency which is documented as "Configure the cache eviction frequency for the managed ledger cache (evictions/sec)" . I'd assume that by reducing the managedLedgerCacheEvictionFrequency, it's possible to reduce CPU consumption. I'm just wondering what the tradeoff in lowering the value is and why is the default value 100 evictions per second? How does changing the managedLedgerCacheEvictionFrequency configuration value impact the broker? BR, Lari
