0b5ed87220
#### Summary of Changes This PR enables RocksDB read side performance metrics to report to blockstore_rocksdb_read_perf. The sampling rate is controlled by an env arg `SOLANA_METRICS_ROCKSDB_PERF_SAMPLES_IN_1K`, specifies the number of perf samples for every 1000 operations. The default value is set to 10, meaning we will report 10 out of 1000 (or 1/100) reads. The metrics are based on the RocksDB [PerfContext](https://github.com/facebook/rocksdb/blob/main/include/rocksdb/perf_context.h). It includes many useful metrics including block read time, cache hit rate, and time spent on decompressing the block. |
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| benches | ||
| src | ||
| tests | ||
| .gitignore | ||
| Cargo.toml | ||
| build.rs | ||