Metrics about Gerrit’s internal state can be sent to external monitoring systems via plugins. See the plugin documentation for details of plugin implementations.
Metrics
The following metrics are reported.
General
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build/label: Version of Gerrit server software.
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events: Triggered events.
Process
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proc/birth_timestamp: Time at which the Gerrit process started.
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proc/uptime: Uptime of the Gerrit process.
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proc/cpu/usage: CPU time used by the Gerrit process.
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proc/num_open_fds: Number of open file descriptors.
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proc/jvm/memory/heap_committed: Amount of memory guaranteed for user objects.
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proc/jvm/memory/heap_used: Amount of memory holding user objects.
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proc/jvm/memory/non_heap_committed: Amount of memory guaranteed for classes, etc.
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proc/jvm/memory/non_heap_used: Amount of memory holding classes, etc.
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proc/jvm/memory/object_pending_finalization_count: Approximate number of objects needing finalization.
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proc/jvm/gc/count: Number of GCs.
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proc/jvm/gc/time: Approximate accumulated GC elapsed time.
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proc/jvm/thread/num_live: Current live thread count.
Caches
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caches/memory_cached: Memory entries.
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caches/memory_hit_ratio: Memory hit ratio.
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caches/memory_eviction_count: Memory eviction count.
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caches/disk_cached: Disk entries used by persistent cache.
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caches/disk_hit_ratio: Disk hit ratio for persistent cache.
HTTP
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http/server/error_count: Rate of REST API error responses.
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http/server/success_count: Rate of REST API success responses.
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http/server/rest_api/count: Rate of REST API calls by view.
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http/server/rest_api/error_count: Rate of REST API calls by view.
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http/server/rest_api/server_latency: REST API call latency by view.
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http/server/rest_api/response_bytes: Size of REST API response on network (may be gzip compressed) by view.
Query
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query/query_latency: Successful query latency, accumulated over the life of the process.
SSH sessions
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sshd/sessions/connected: Number of currently connected SSH sessions.
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sshd/sessions/created: Rate of new SSH sessions.
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sshd/sessions/authentication_failures: Rate of SSH authentication failures.
SQL connections
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sql/connection_pool/connections: SQL database connections.
JGit
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jgit/block_cache/cache_used: Bytes of memory retained in JGit block cache.
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jgit/block_cache/open_files: File handles held open by JGit block cache.
Git
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git/upload-pack/request_count: Total number of git-upload-pack requests.
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git/upload-pack/phase_counting: Time spent in the 'Counting…' phase.
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git/upload-pack/phase_compressing: Time spent in the 'Compressing…' phase.
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git/upload-pack/phase_writing: Time spent transferring bytes to client.
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git/upload-pack/pack_bytes: Distribution of sizes of packs sent to clients.
BatchUpdate
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batch_update/execute_change_ops: BatchUpdate change update latency, excluding reindexing
NoteDb
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notedb/update_latency: NoteDb update latency by table.
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notedb/stage_update_latency: Latency for staging updates to NoteDb by table.
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notedb/read_latency: NoteDb read latency by table.
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notedb/parse_latency: NoteDb parse latency by table.
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notedb/auto_rebuild_latency: NoteDb auto-rebuilding latency by table.
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notedb/auto_rebuild_failure_count: NoteDb auto-rebuilding attempts that failed by table.
Reviewer Suggestion
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reviewer_suggestion/query_accounts: Latency for querying accounts for reviewer suggestion.
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reviewer_suggestion/recommend_accounts: Latency for recommending accounts for reviewer suggestion.
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reviewer_suggestion/load_accounts: Latency for loading accounts for reviewer suggestion.
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reviewer_suggestion/query_groups: Latency for querying groups for reviewer suggestion.
Replication Plugin
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plugins/replication/replication_latency: Time spent pushing to remote destination.
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plugins/replication/replication_delay: Time spent waiting before pushing to remote destination.
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plugins/replication/replication_retries: Number of retries when pushing to remote destination.