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Christian Schwarz aad410c8f1 improve ondemand-download latency observability (#11421) 
## Problem

We don't have metrics to exactly quantify the end user impact of
on-demand downloads.

Perf tracing is underway (#11140) to supply us with high-resolution
*samples*.

But it will also be useful to have some aggregate per-timeline and
per-instance metrics that definitively contain all observations.

## Summary of changes

This PR consists of independent commits that should be reviewed
independently.

However, for convenience, we're going to merge them together.

- refactor(metrics): measure_remote_op can use async traits
- impr(pageserver metrics): task_kind dimension for
remote_timeline_client latency histo
  - implements https://github.com/neondatabase/cloud/issues/26800
- refs
https://github.com/neondatabase/cloud/issues/26193#issuecomment-2769705793
- use the opportunity to rename the metric and add a _global suffix;
checked grafana export, it's only used in two personal dashboards, one
of them mine, the other by Heikki
- log on-demand download latency for expensive-to-query but precise
ground truth
- metric for wall clock time spent waiting for on-demand downloads

## Refs

- refs https://github.com/neondatabase/cloud/issues/26800
- a bunch of minor investigations / incidents into latency outliers
2025-04-04 18:04:39 +00:00
..
data
Fetch remote extension in ALTER EXTENSION UPDATE statements (#11102)
2025-03-09 17:29:44 +00:00
test_ancestor_branch.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_attach_tenant_config.py
pageserver: add tenant level performance tracing sampling ratio (#11433)
2025-04-04 13:41:28 +00:00
test_auth_broker.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_auth.py
Enable all pyupgrade checks in ruff
2024-10-08 14:32:26 -05:00
test_backpressure.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_bad_connection.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_basebackup_error.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_branch_and_gc.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_branch_behind.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_branching.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_broken_timeline.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_build_info_metric.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_change_pageserver.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_clog_truncate.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_close_fds.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_combocid.py
test_runner: use LFC by default (#8613)
2024-11-25 09:01:05 +00:00
test_compaction.py
Increase timeout for test_pageserver_gc_compaction_smoke (#11410)
2025-04-03 11:23:30 +00:00
test_compatibility.py
pageserver config: ignore+warn about unknown fields (instead of deny_unknown_fields) (#11275)
2025-04-04 17:30:58 +00:00
test_compute_catalog.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_compute_locales.py
Switch compute-related locales to C.UTF-8 by default
2024-11-08 12:19:18 -06:00
test_compute_metrics.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_compute_migrations.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_compute_reconfigure.py
feat(compute): Add compute_ctl_up metric (#11376)
2025-04-01 08:51:17 +00:00
test_config.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_crafted_wal_end.py
safekeeper: use protobuf for sending compressed records to pageserver (#9821)
2024-11-27 12:12:21 +00:00
test_createdropdb.py
Enable all pyupgrade checks in ruff
2024-10-08 14:32:26 -05:00
test_createuser.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_ddl_forwarding.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_disk_usage_eviction.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_download_extensions.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_endpoint_crash.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_explain_with_lfc_stats.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_extensions.py
compute_ctl: Add endpoint that allows extensions to be installed (#9344)
2024-10-18 15:07:36 +03:00
test_fsm_truncate.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_fullbackup.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_gc_aggressive.py
improve ondemand-download latency observability (#11421)
2025-04-04 18:04:39 +00:00
test_gin_redo.py
Enable all pyupgrade checks in ruff
2024-10-08 14:32:26 -05:00
test_hot_standby.py
test_runner: improve wait_until (#9936)
2024-12-02 10:26:15 +00:00
test_import_pgdata.py
use a prod-like shared_buffers size for some perf unit tests (#11373)
2025-04-02 10:43:05 +00:00
test_import.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_ingestion_layer_size.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_large_schema.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_layer_bloating.py
Fix logical_replication_sync test fixture (#10531)
2025-02-03 12:44:47 +00:00
test_layer_eviction.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_layer_writers_fail.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_layers_from_future.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_lfc_prefetch.py
Remove loop from pageserver_try_receive (#11387)
2025-03-31 19:49:32 +00:00
test_lfc_resize.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_lfc_working_set_approximation.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_local_file_cache.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_logging.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_logical_replication.py
Fix logical_replication_sync test fixture (#10531)
2025-02-03 12:44:47 +00:00
test_lsn_mapping.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_multixact.py
Enable all pyupgrade checks in ruff
2024-10-08 14:32:26 -05:00
test_nbtree_pagesplit_cycleid.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_neon_cli.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_neon_extension.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_neon_local_cli.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_neon_superuser.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_next_xid.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_normal_work.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_oid_overflow.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_old_request_lsn.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_ondemand_download.py
improve ondemand-download latency observability (#11421)
2025-04-04 18:04:39 +00:00
test_ondemand_slru_download.py
Python 3.11 (#9515)
2024-11-21 16:25:31 +00:00
test_ondemand_wal_download.py
Register custom xlog reader callbacks for on-demand WAL download in StartupDecodingContext (#9007)
2024-11-19 22:29:57 +02:00
test_page_service_batching_regressions.py
fix(page_service pipelining): tenant cannot shut down because gate kept open while flushing responses (#10386)
2025-01-16 20:34:02 +00:00
test_pageserver_api.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_catchup.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_config.py
pageserver config: ignore+warn about unknown fields (instead of deny_unknown_fields) (#11275)
2025-04-04 17:30:58 +00:00
test_pageserver_crash_consistency.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_generations.py
pageserver: clean up DeletionQueue push_layers_sync (#10701)
2025-02-07 13:03:01 +00:00
test_pageserver_getpage_throttle.py
pageserver config: ignore+warn about unknown fields (instead of deny_unknown_fields) (#11275)
2025-04-04 17:30:58 +00:00
test_pageserver_layer_rolling.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_metric_collection.py
improve ondemand-download latency observability (#11421)
2025-04-04 18:04:39 +00:00
test_pageserver_reconnect.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_restart.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_restarts_under_workload.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pageserver_secondary.py
pageserver/secondary: deregister IO metrics (#11283)
2025-04-04 10:52:59 +00:00
test_pg_query_cancellation.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pg_regress.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pg_waldump.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_pgstat.py
Move neon_pgstat_file_size_limit to the extension (#10959)
2025-02-25 12:23:04 +00:00
test_physical_and_logical_replicaiton.py
Fix logical_replication_sync test fixture (#10531)
2025-02-03 12:44:47 +00:00
test_physical_replication.py
use a prod-like shared_buffers size for some perf unit tests (#11373)
2025-04-02 10:43:05 +00:00
test_pitr_gc.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_postgres_version.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_prefetch_buffer_resize.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_proxy_allowed_ips.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_proxy_metric_collection.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_proxy_websockets.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_proxy.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_read_validation.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_readonly_node.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_recovery.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_relations.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_remote_storage.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_replica_start.py
test_runner: improve wait_until (#9936)
2024-12-02 10:26:15 +00:00
test_role_grants.py
compute_ctl: Add endpoint that allows setting role grants (#9395)
2024-10-18 11:25:45 +01:00
test_s3_restore.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_safekeeper_deletion.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_setup.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_sharding.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_signed_char.py
Add -fsigned-char for cross platform signed chars (#10852)
2025-02-28 21:07:21 +00:00
test_sni_router.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_ssl.py
storage: live ssl certificate reload (#11309)
2025-03-20 16:26:27 +00:00
test_storage_controller.py
Add test_storcon_create_delete_sk_down and make it work (#11400)
2025-04-04 00:17:40 +00:00
test_storage_scrubber.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_subscriber_branching.py
Fix deadlock in drop_subscriptions_before_start (#10806)
2025-02-20 17:14:16 +00:00
test_subscriber_restart.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_subxacts.py
safekeeper: use protobuf for sending compressed records to pageserver (#9821)
2024-11-27 12:12:21 +00:00
test_tenant_conf.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_tenant_delete.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_tenant_detach.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_tenant_relocation.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_tenant_size.py
fix(test): wait for shard split complete for test_lsn_lease_storcon (#11436)
2025-04-03 17:49:45 +00:00
test_tenant_tasks.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_tenants_with_remote_storage.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_tenants.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_threshold_based_eviction.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_timeline_archive.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_timeline_delete.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_timeline_detach_ancestor.py
fix(pageserver): clean up aux files before detaching (#11299)
2025-04-03 15:55:22 +00:00
test_timeline_gc_blocking.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_timeline_size.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_truncate.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_twophase.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_unlogged.py
Enable all pyupgrade checks in ruff
2024-10-08 14:32:26 -05:00
test_unstable_extensions.py
Create the notion of unstable extensions
2024-10-28 17:47:15 -05:00
test_vm_bits.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_vm_truncate.py
Correctly truncate VM (#9342)
2024-11-14 17:19:13 +02:00
test_wal_acceptor_async.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_wal_acceptor.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_wal_receiver.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_wal_restore.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00
test_walredo_not_left_behind_on_detach.py
ruff: enable TC — flake8-type-checking (#11368)
2025-03-30 18:58:33 +00:00