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6f7a069bce
This series is part of the effort to reduce the overall overhead originating from metrics reporting, both on the Scylla side and the metrics collecting server (Prometheus or similar) The idea in this series is to create an equivalent of levels with a label. First, label a subset of the metrics used by the dashboards. Second, the per-table metrics that are now off by default will be marked with a different label. The following specific optional features: CDC, CAS, and Alternator have a dedicated label now. This will allow users to disable all metrics of features that are not in use. All the rest of the metrics are left unlabeled. Without any changes, users would get the same metrics they are getting today. But you could pass the `__level=1` and get only those metrics the dashboard needs. That reduces between 50% and 70% (many metrics are hidden if not used, so the overall number of metrics varies). The labels are not reported based on the seastar feature of hiding labels that start with an underscore. Closes scylladb/scylladb#12246 * github.com:scylladb/scylladb: db/view/view.cc: label metrics with basic_level transport/server.cc: label metrics with basic_level service/storage_proxy.cc: label metrics with basic_level and cas main.cc: label metrics with basic_level streaming/stream_manager.cc: label metrics with basic_level repair/repair.cc: label metrics with basic_level service/storage_service.cc: label metrics with basic_level gms/gossiper.cc: label metrics with basic_level replica/database.cc: label metrics with basic_level cdc/log.cc: label metrics with basic_level and cdc alternator: label metrics with basic_level and alternator row_cache.cc: label metrics with basic_level query_processor.cc: label metrics with basic_level sstables.cc: label metrics with basic_level utils/logalloc.cc label metrics with basic_level commitlog.cc: label metrics with basic_level compaction_manager.cc: label metrics with basic_level Adding the __level and features labels