Details
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Improvement
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Resolution: Fixed
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Minor
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master
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0
Description
memcached has long supported an undocumented "aggregate" stats group which returns a limited set of metrics aggregated across all buckets:
‡ ../install/bin/cbstats localhost:12000 -u Administrator -p asdasd raw aggregate
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auth_cmds: 0
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auth_errors: 0
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bytes_read: 30451
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bytes_subdoc_lookup_extracted: 0
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bytes_subdoc_lookup_total: 0
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bytes_subdoc_mutation_inserted: 0
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bytes_subdoc_mutation_total: 0
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bytes_written: 24826468
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cas_badval: 0
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cas_hits: 0
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cas_misses: 0
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cmd_flush: 0
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cmd_get: 0
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cmd_lock: 0
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cmd_lookup: 0
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cmd_lookup_10s_count: 0
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cmd_lookup_10s_duration_us: 0
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cmd_mutation: 0
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cmd_mutation_10s_count: 0
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cmd_mutation_10s_duration_us: 0
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cmd_set: 0
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cmd_subdoc_lookup: 0
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cmd_subdoc_mutation: 0
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cmd_total_gets: 0
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cmd_total_ops: 0
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cmd_total_sets: 0
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conn_yields: 0
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connection_structures: 14
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curr_connections: 18
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daemon_connections: 4
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daemon_memory_allocated: 20225040
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daemon_memory_resident: 26247168
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decr_hits: 0
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decr_misses: 0
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delete_hits: 0
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delete_misses: 0
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get_hits: 0
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get_misses: 0
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incr_hits: 0
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incr_misses: 0
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iovused_high_watermark: 0
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lock_errors: 0
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memcached_version: 128b8cffaebb3d7a7a279d6f73990674208a9c84
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msgused_high_watermark: 0
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rejected_conns: 0
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stat_reset: Tue Mar 28 15:40:09 2023
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stat_timings_mem_usage: 22128
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system_connections: 7
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threads: 8
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time: 1680014917
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total_connections: 21
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total_resp_errors: 0
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uptime: 508
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version: 0.0.0-0000
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This stat group is currently unused by the product - it used to be used by ns_server prior to the prometheus migration, and it's also not used by cbcollect_info, nor documented.
We should remove this group to simplify the stats tracking logic inside memcached; this also allows us to repurpose the "no bucket" - currently used to hold aggregate stats - to track operations when no bucket is selected.
Attachments
Issue Links
- relates to
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MB-56183 KV requests not associated with a bucket are not included in opcode stats
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- Closed
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