Google Cloud Monitoring Metrics

Key
Metric Type Display Name

Kind, Type, Unit	Description
	Labels

🚧
Metric prefixes
All metrics listed below are prefixed with external.googleapis.com/bluemedora/generic_node/varnish except for the metrics that are also listed in the associated Stackdriver Agent Migration page. If the collector is installed on the Varnish host system, the metrics listed there will be prefixed with agent.googleapis.com/varnish

Google Cloud Monitoring Metrics Metrics

`/backend/data` Data

CUMULATIVE, INT64, By	Amount of data flowing to and from backend.
	type: Data type ('body', 'header').
	category: Data category ('backend request', 'pipe session').





`/backend/requests` Requests

CUMULATIVE, INT64, Requests	Backend requests sent.





`/backend/fetches/not_attempted_busy` Requests not Attempted due to Backend Being Busy

CUMULATIVE, INT64, n/a	Number of times the max_connections limit was reached.





`/backend/fetches/not_attempted_unhealthy` Requests not Attempted due to Backend Being Unhealthy

CUMULATIVE, INT64, n/a	Fetches not attempted due to backend being unhealthy.





`/backend/connections` Concurrent Connections

GAUGE, INT64, Connections	Concurrent connections to the backend.





`/backend/connections/failed` Connection Failures

CUMULATIVE, INT64, Connections	Count of failures to create connection.
	reason: Reason for connection failure.




`/backend/connections/failed_total` Connections Failed

CUMULATIVE, INT64, Connections	All failed connections. All connections/failed_ counters may be slightly inaccurate for efficiency.*





`/backend/connections/not_attempted` Connections Not Attempted

CUMULATIVE, INT64, Connections	Connections not attempted during the backend_local_error_holddown or backend_remote_error_holddown interval after a fundamental connection issue.





`/cache/data` Data

CUMULATIVE, INT64, By	Amount of data flowing to and from backend.
	type: Data type ('body', 'header').
	category: Data category ('backend request', 'pipe session').





`/cache/active_pipe_sessions` Active Pipe Sessions

GAUGE, INT64, Sessions	Number of ongoing pipe sessions.





`/backend_connection_count` Backend connection successes

CUMULATIVE, INT64, Connections	Backend connection success count.
	type: The backend connection type (either 'failures', 'not-attempted', 'recycled', 'reuses', 'success', 'too-many', 'unused', or 'was-closed'.
	category: The Varnish metric category.





`/cache/backend_connections/retried` Backend Connections Retried

CUMULATIVE, INT64, Connections	Number of times a connection to a backend was retried because a recycled connection was closed before we could reuse it.





`/cache/backend_connections/too_late` Backend Connections Closed

CUMULATIVE, INT64, Connections	Number of times a connection to a backend was closed before we could reuse it. This metric only exists in version 3.X.





`/cache/backend_requests` Backend Requests

CUMULATIVE, INT64, Requests	Number of Backend requests made.





`/cache/backends` Number of backends

GAUGE, INT64, n/a	Number of backends known to Varnish.





`/cache/bans/current` Current Bans

GAUGE, INT64, n/a	Number of all bans in system, including bans superseded by newer bans and bans already checked by the ban-lurker.





`/cache/bans/added` Bans Added

CUMULATIVE, INT64, n/a	Number of bans added to ban list.





`/cache/bans/completed` Bans Marked Completed

GAUGE, INT64, n/a	Number of bans which are no longer active, either because they got checked by the ban-lurker or superseded by newer identical bans.





`/cache/bans/deleted` Bans Deleted

CUMULATIVE, INT64, n/a	Number of bans deleted from ban list.





`/cache/bans/duplicated` Bans Superseded by Other Bans

CUMULATIVE, INT64, n/a	Number of bans replaced by later identical bans.





`/cache/ban_lurker/contention` Ban-Lurker Waits for Lookup

CUMULATIVE, INT64, n/a	Number of times the ban-lurker had to wait for lookups.





`/cache/ban_lurker/objects_killed` Objects Killed by Ban-Lurker

CUMULATIVE, INT64, n/a	Number of objects killed by the ban-lurker.





`/cache/ban_lurker/objects_killed_cutoff` Objects Killed for Cutoff by Ban-Lurker

CUMULATIVE, INT64, n/a	Number of objects killed by the ban-lurker to keep the number of bans below ban_cutoff.





`/cache/ban_lurker/tested` Bans Tested by Ban-Lurker

CUMULATIVE, INT64, n/a	Number of bans and objects tested against each other by the ban-lurker.





`/cache/ban_lurker/tests_tested` Ban Tests Tested by Ban-Lurker

CUMULATIVE, INT64, n/a	Number of tests and objects tested against each other by the ban-lurker. 'ban req.url == foo && req.http.host == bar' counts as one in 'bans_tested' and as two in 'bans_tests_tested'.





`/cache/bans/objects_killed` Objects Killed by Bans

CUMULATIVE, INT64, n/a	Number of objects killed by bans during object lookup.





`/cache/bans/persisted_data` Persisted Ban Lists Size

GAUGE, INT64, By	Amount of data used by the persisted ban lists.





`/cache/bans/persisted_fragmentation` Fragmentation in Persistent Ban Lists

GAUGE, INT64, By	Amount of extra data accumulated through dropped and completed bans in the persistent ban lists.





`/cache/bans/tested` Bans Tested

CUMULATIVE, INT64, n/a	Number of bans and objects tested against each other during hash lookup.





`/cache/bans/tests_tested` Ban Tests Tested

CUMULATIVE, INT64, n/a	Number of tests and objects tested against each other during lookup. 'ban req.url == foo && req.http.host == bar' counts as one in 'bans_tested' and as two in 'bans_tests_tested'.





`/cache/bans/using_obj` Bans Using obj.*

GAUGE, INT64, n/a	Number of bans which use obj. variables. These bans can possibly be washed by the ban-lurker.*





`/cache/bans/using_req` Bans Using req.*

GAUGE, INT64, n/a	Number of bans which use req. variables. These bans can not be washed by the ban-lurker.*





`/cache/requests/busy_killed` Requests Killed after Sleep

CUMULATIVE, INT64, n/a	Number of requests killed from the busy object sleep list due to lack of resources.





`/cache/requests/busy_sleep` Requests Sent to Sleep

CUMULATIVE, INT64, n/a	Number of requests sent to sleep without a worker thread because they found a busy object.





`/cache/requests/busy_wakeup` Requests Woken after Sleep

CUMULATIVE, INT64, n/a	Number of requests taken off the busy object sleep list and rescheduled.





`/cache_operation_count` Cache operations

CUMULATIVE, INT64, n/a	Cache operation count.
	operation: The cache operation type (either 'hit', 'miss', or 'hitpass').
	cache_name: The Varnish cache name suffixed with a metric category





`/cache/child_process/dumps` Child Process Core Dumps

CUMULATIVE, INT64, n/a	Number of times the child process has produced core dumps.





`/cache/child_process/starts` Child Process Starts

CUMULATIVE, INT64, n/a	Number of times the child process has been started.





`/cache/child_process/stops` Child Process Stops

CUMULATIVE, INT64, n/a	Number of times the child process stopped.
	reason: Reason that the child process stopped.




`/cache/client_requests/dropped` Client Requests Dropped

CUMULATIVE, INT64, Connections	Number of times a client connection was closed before we could respond. This metric only exists in version 3.X.





`/cache/client_requests/errors` Client Requests Received Subject to HTTP Errors

CUMULATIVE, INT64, n/a	Number of times a client received an HTTP error (4XX are client errors, 500 are Varnish errors).
	type: Type of HTTP Error response ('400', '417', '500').




`/cache/client_requests` Good Client Requests Received

CUMULATIVE, INT64, Requests	The count of parseable client requests.





`/cache/dns_director/operations` DNS Director Operations

CUMULATIVE, INT64, n/a	Number of DNS director operations.
	type: DNS Director operation ('cache hit', 'failed lookup', 'lookup').




`/cache/dns_director/full_cache` DNS Director Full DNSCache

CUMULATIVE, INT64, n/a	Number of times the DNS Director lookup cache did not have space for new entries. This metric only exists in version 3.X.





`/cache/esi/parse_errors` ESI Parse Errors

CUMULATIVE, INT64, n/a	Number of ESI parse errors (unlock).





`/cache/esi/parse_warnings` ESI Parse Warnings

CUMULATIVE, INT64, n/a	Number of ESI parse warnings (unlock).





`/cache/objects/expired` Expired Objects

CUMULATIVE, INT64, n/a	Number of objects that expired from cache because of old age.





`/cache/objects/mailed_to_expiry` Objects Mailed to Expiry Thread

CUMULATIVE, INT64, n/a	Number of objects mailed to expiry thread for handling.





`/cache/objects/received_by_expiry` Objects Received by Expiry Thread

CUMULATIVE, INT64, n/a	Number of objects received by expiry thread for handling.





`/cache/fetches` Backend Fetches

CUMULATIVE, INT64, n/a	Number of fetches that Varnish executed against backends.
	result: Result of backend request ('empty response', 'response', 'failed').
	detail: Detailed reason for result of backend request if available.




`/cache/fetches/total` Backend Fetches Initiated

CUMULATIVE, INT64, n/a	Number of backend fetches initiated.





`/cache/gunzips` Gunzip Operations

CUMULATIVE, INT64, n/a	Number of gunzip operations.





`/cache/gzips` Gzip Operations

CUMULATIVE, INT64, n/a	Number of gzip operations.





`/cache/hcb/inserts` HCB Inserts

CUMULATIVE, INT64, n/a	Number of HCB Inserts.





`/cache/hcb/lookups_lock` HCB Lookups with Lock

CUMULATIVE, INT64, n/a	Number of HCB Lookups with lock.





`/cache/hcb/lookups_nolock` HCB Lookups without Lock

CUMULATIVE, INT64, n/a	Number of HCB Lookups without lock.





`/cache/http_sessions/dropped` HTTP Sessions Dropped

CUMULATIVE, INT64, Sessions	Number of times an HTTP/1 session was dropped because the thread queue was too long already. See also parameter thread_queue_limit.





`/cache/lost_headers` HTTP Header Overflows

CUMULATIVE, INT64, n/a	HTTP header overflows.





`/cache/lru/limited` Nuke Limit Reached

CUMULATIVE, INT64, n/a	Number of times more storage space was needed, but limit was reached in a nuke_limit. See also parameter nuke_limit.





`/cache/lru/moved_objects` LRU Moved Objects

CUMULATIVE, INT64, n/a	Number of move operations done on the LRU list.





`/cache/lru/nuked_objects` LRU Nuked Objects

CUMULATIVE, INT64, n/a	Number of objects that have been forcefully evicted from storage to make room for a new object.





`/cache/objectcores` Object Metadata Elements in Cache

GAUGE, INT64, n/a	Approximate number of object metadata elements in the cache. Each object needs an objectcore, extra objectcores are for hit-for-miss, hit-for-pass and busy objects.





`/cache/objectheads` Hash Entries in Cache

GAUGE, INT64, n/a	Approximate number of different hash entries in the cache.





`/cache/objects` Objects in Cache

GAUGE, INT64, n/a	Approximate number of HTTP objects (headers + body, if present) in the cache.





`/cache/objects/overflowing` Objects Overflowing Workspace

CUMULATIVE, INT64, n/a	Number of objects overflowing workspace. This metric only exists in version 3.X.





`/cache/objects/purged` Objects Purged

CUMULATIVE, INT64, n/a	Number of purged objects.





`/cache/objects/sent_with_sendfile` Objects Sent with Sendfile

CUMULATIVE, INT64, n/a	Number of objects sent with sendfile. This metric only exists in version 3.X.





`/cache/objects/sent_with_write` Objects Sent with Write

CUMULATIVE, INT64, n/a	Number of objects sent with write. This metric only exists in version 3.X.





`/cache/requests/passes` Passed Requests

CUMULATIVE, INT64, Requests	Number of pass-ed requests seen by Varnish.





`/cache/pipe_sessions` Pipe Sessions

CUMULATIVE, INT64, Sessions	Number of pipe sessions seen by Varnish.





`/cache/pipe_sessions/limited` Pipes Limited

CUMULATIVE, INT64, Sessions	Number of times more pipes were needed, but the limit was reached. See also parameter pipe_sess_max.





`/cache/purge_operations` Purge Operations

CUMULATIVE, INT64, n/a	Number of purge operations executed.





`/cache/requests/dropped` Requests Dropped

CUMULATIVE, INT64, Requests	Number of times an HTTP/2 stream was refused because the thread queue was too long already. See also parameter thread_queue_limit.





`/client_connection_count` Client connections

CUMULATIVE, INT64, Sessions	Client connection count.
	type: the client connection type (either 'accepted', 'dropped', or 'received'
	category: The Varnish metric category.





`/cache/sessions/closed_total` Sessions Closed

CUMULATIVE, INT64, Sessions	Number of sessions closed.





`/cache/sessions/closed` Session Closed

CUMULATIVE, INT64, Sessions	Number of sessions closed.
	type: Overall reason for session close. ('error', ok')
	reason: Detailed reason for session close.




`/cache/sessions/closed_with_error` Session Closed with Error

CUMULATIVE, INT64, Sessions	Number of sessions closed with errors. This value is the sum of the error sessionsclosed Counters, which are detailed in sessions/closed.*





`/cache/sessions/connected` Sessions Accepted

CUMULATIVE, INT64, Sessions	Count of sessions successfully accepted.





`/cache/sessions/dropped` Sessions Dropped

CUMULATIVE, INT64, Sessions	Count of sessions silently dropped due to lack of worker thread.





`/cache/sessions/failed_total` Session Accept Failures

CUMULATIVE, INT64, Sessions	Count of failures to accept TCP connection. This value is the sum of the sessionsfailed Counters, which are detailed in sessions/failed.*





`/cache/sessions/failed` Session Accept Failures

CUMULATIVE, INT64, Sessions	Count of failures to accept TCP connection.
	type: Type of session accept failure.




`/cache/sessions/herded` Sessions Herded

CUMULATIVE, INT64, Sessions	Number of times the timeout_linger triggered and a session released its thread. This allows a thread to be shared between multiple request sessions while the backend processes a request.





`/cache/sessions/linger` Sessions Lingering

CUMULATIVE, INT64, Sessions	Number of sessions reinitialized after use with the timeout_linger enabled. This metric only exists in version 3.X.





`/cache/sessions/queued` Sessions Queued

CUMULATIVE, INT64, Sessions	Number of times session was queued waiting for a thread. See also parameter thread_queue_limit.





`/cache/sessions/read_ahead` Sessions Read Ahead

CUMULATIVE, INT64, Sessions	Session read ahead.





`/cache/sessions/with_pipelined_input` Sessions with Pipelined Input

CUMULATIVE, INT64, Sessions	Number of sessions reinitialized with pipelined input. This metric only exists in version 3.X.





`/cache/shm/contention` SHM Mutex Contention

CUMULATIVE, INT64, n/a	Number of EBUSY errors when attempting to write to SHM.





`/cache/shm/cycles` SHM Cycles

CUMULATIVE, INT64, n/a	Number of SHM cycles wrapping through buffer.





`/cache/shm/flushes` SHM Flushes

CUMULATIVE, INT64, n/a	Number of SHM flushes due to overflow.





`/cache/shm/records` SHM Records

CUMULATIVE, INT64, n/a	Number of SHM records.





`/cache/shm/writes` SHM Writes

CUMULATIVE, INT64, n/a	Number of SHM writes.





`/cache/summ_operations` Stat Summ Operations

CUMULATIVE, INT64, n/a	Number of times per-thread statistics were summed into the global Counters.





`/cache/synthetic_responses` Synthetic Response

CUMULATIVE, INT64, n/a	Number of synthetic responses made by Varnish.





`/cache/test_gunzips` Test Gunzip Operations

CUMULATIVE, INT64, n/a	Those operations occur when Varnish receives a compressed object from a backend. They are done to verify the gzip stream while it's inserted in storage.





`/cache/thread_pools` Thread Pools

GAUGE, INT64, n/a	Number of thread pools (see also parameter thread_pools). Pools cannot be removed once created.





`/cache/thread_queue_length` Length of Session Queue

GAUGE, INT64, n/a	Length of session queue waiting for threads. See also parameter thread_queue_limit.





`/cache/threads` Number of Threads

GAUGE, INT64, n/a	Number of threads in all pools. See also parameters thread_pools, thread_pool_min and thread_pool_max.





`/cache/threads/requested` Threads Requested

CUMULATIVE, INT64, n/a	Number of threads that Varnish attempted to create in thread pools.
	result: Result of thread request ('created', 'failed', 'limited').




`/cache/threads/destroyed` Threads Destroyed

CUMULATIVE, INT64, n/a	Number of threads destroyed in all pools.





`/cache/uptime` Varnish Process Uptime

GAUGE, INT64, s	How long the Varnish processes have been running.
	process: Process ('management', 'child').




`/cache/objects/vampire` Unresurrected Objects

GAUGE, INT64, n/a	Number of unresurrected objects.





`/cache/vbc` VBCs

GAUGE, INT64, n/a	Number of VBC structs. This metric only exists in version 3.X.





`/cache/vcl` Loaded VLCs

GAUGE, INT64, n/a	Number of loaded VCLs in total.





`/cache/vcl/available` VCLs Available

GAUGE, INT64, n/a	Number of VCLs available.





`/cache/vcl/discarded` Discarded VCLs

GAUGE, INT64, n/a	Number of discarded VCLs.





`/cache/vcl/failures` VCL Failures

CUMULATIVE, INT64, n/a	Number of failures which prevented VCL from completing.





`/cache/vmods` Loaded VMODs

GAUGE, INT64, n/a	Number of loaded VMODs.





`/cache/waiting_list` Hash Waiting List Size

GAUGE, INT64, n/a	Size of hash waiting list. This metric only exists in version 3.X.





`/cache/workspace_overflows` Workspace Overflows

CUMULATIVE, INT64, n/a	Number of times Varnish ran out of space in workspaces.
	workspace: Workspace that ran out of space ('backend', 'client', 'session', 'thread').




`/lock_class/operations/contended` Contended Lock Operations

CUMULATIVE, INT64, n/a	Lock operations which returned EBUSY on the first locking attempt. If the lck debug bit is unset, this counter will never be incremented even if lock operations are contended.





`/lock_class/operations/contended_trylock` Contended Trylock Operations

CUMULATIVE, INT64, n/a	Trylock operations which returned EBUSY. If the lck debug bit is unset, this counter will never be incremented even if lock operations are contended.





`/lock_class/created` Created Locks

CUMULATIVE, INT64, n/a	Created locks.





`/lock_class/destroyed` Destroyed Locks

CUMULATIVE, INT64, n/a	Destroyed locks.





`/lock_class/operations` Lock Operations

CUMULATIVE, INT64, n/a	Lock Operations.





`/memory_pool/allocations` Allocations

CUMULATIVE, INT64, n/a	Allocations on items in the pool.





`/memory_pool/frees` Frees

CUMULATIVE, INT64, n/a	Free operations on items in use.





`/memory_pool/items/in_pool` In Pool

GAUGE, INT64, n/a	Number of items available in memory pool.





`/memory_pool/items/in_use` In Use

GAUGE, INT64, n/a	Number of items currently in use.





`/memory_pool/ran_dry` Pool Ran Dry

CUMULATIVE, INT64, n/a	Number of times that no items were in pool when an allocation was attempted.





`/memory_pool/items/recycled` Recycled Items

CUMULATIVE, INT64, n/a	Number of reused items from the pool.





`/memory_pool/size_allocated` Size Allocated

GAUGE, INT64, By	Allocated size of the pool.





`/memory_pool/size_requested` Size Requested

GAUGE, INT64, By	Requested size of the pool.





`/memory_pool/items/surplus` Surplus Items Removed

CUMULATIVE, INT64, n/a	Number of items removed from pool because the maximum size was exceeded.





`/memory_pool/items/timed_out` Timed Out Items Removed

CUMULATIVE, INT64, n/a	Number of items removed from pool because they had exceeded the maximum age since the last time used.





`/memory_pool/items/too_small_to_recycle` Too Small to Recycle

CUMULATIVE, INT64, n/a	Number of items that were chosen for recycle but were too small.





`/storage_device/allocated_data` Data Allocated

CUMULATIVE, INT64, By	Amount of data allocated by this storage.





`/storage_device/allocations` Current Allocations

GAUGE, INT64, n/a	Number of storage allocations outstanding.





`/storage_device/allocator_failures` Allocator Failures

CUMULATIVE, INT64, n/a	Number of times the storage has failed to provide a storage segment.





`/storage_device/allocator_requests` Allocator Requests

CUMULATIVE, INT64, n/a	Number of times the storage has been asked to provide a storage segment.





`/storage_device/available_space` Space Available

GAUGE, INT64, By	Amount of data left in the storage.





`/storage_device/current_allocated_data` Current Allocated Data

GAUGE, INT64, By	Amount of data currently allocated from the storage.





`/storage_device/file_allocations` Allocations on File

GAUGE, INT64, n/a	Number of allocated ranges on file. This metric is only available for File storage devices.





`/storage_device/freed_data` Data Freed

CUMULATIVE, INT64, By	Amount of data returned to this storage.





`/storage_device/large_file_allocations_free` Large File Allocations Free

GAUGE, INT64, n/a	Number of large free allocated ranges on file. This metric is only available for File storage devices.





`/storage_device/small_file_allocations_free` Small File Allocations Free

GAUGE, INT64, n/a	Number of small free allocated ranges on file. This metric is only available for File storage devices.

🚧Metric prefixes

🚧
Metric prefixes