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<ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="setup/forward_proxy.html">Configuring a Forward/Outbound Proxy</a></li><li class="chapter-item expanded "><a href="turn-howto.html">Configuring a Turn Server</a></li><li class="chapter-item expanded "><a href="delegate.html">Delegation</a></li><li class="chapter-item expanded affix "><li class="part-title">Upgrading</li><li class="chapter-item expanded "><a href="upgrade.html">Upgrading between Synapse 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href="usage/administration/understanding_synapse_through_grafana_graphs.html">Understanding Synapse Through Grafana Graphs</a></li><li class="chapter-item expanded "><a href="usage/administration/useful_sql_for_admins.html">Useful SQL for Admins</a></li><li class="chapter-item expanded "><a href="usage/administration/database_maintenance_tools.html">Database Maintenance Tools</a></li><li class="chapter-item expanded "><a href="usage/administration/state_groups.html">State Groups</a></li><li class="chapter-item expanded "><a href="usage/administration/request_log.html">Request log format</a></li><li class="chapter-item expanded "><a href="usage/administration/admin_faq.html">Admin FAQ</a></li><li class="chapter-item expanded "><div>Scripts</div></li></ol></li><li class="chapter-item expanded "><li class="part-title">Development</li><li class="chapter-item expanded "><a href="development/contributing_guide.html">Contributing Guide</a></li><li class="chapter-item expanded "><a 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Statistics</a></li></ol></li><li class="chapter-item expanded "><div>Scripts</div></li><li class="chapter-item expanded affix "><li class="part-title">Other</li><li class="chapter-item expanded "><a href="deprecation_policy.html">Dependency Deprecation Policy</a></li><li class="chapter-item expanded "><a href="other/running_synapse_on_single_board_computers.html">Running Synapse on a Single-Board Computer</a></li></ol>
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<h1 id="how-to-monitor-synapse-metrics-using-prometheus"><a class="header" href="#how-to-monitor-synapse-metrics-using-prometheus">How to monitor Synapse metrics using Prometheus</a></h1>
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<ol>
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<li>
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<p>Install Prometheus:</p>
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<p>Follow instructions at
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<a href="http://prometheus.io/docs/introduction/install/">http://prometheus.io/docs/introduction/install/</a></p>
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</li>
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<li>
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<p>Enable Synapse metrics:</p>
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<p>There are two methods of enabling metrics in Synapse.</p>
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<p>The first serves the metrics as a part of the usual web server and
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can be enabled by adding the "metrics" resource to the existing
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listener as such:</p>
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<pre><code class="language-yaml"> resources:
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- names:
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- client
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- metrics
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</code></pre>
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<p>This provides a simple way of adding metrics to your Synapse
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installation, and serves under <code>/_synapse/metrics</code>. If you do not
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wish your metrics be publicly exposed, you will need to either
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filter it out at your load balancer, or use the second method.</p>
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<p>The second method runs the metrics server on a different port, in a
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different thread to Synapse. This can make it more resilient to
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heavy load meaning metrics cannot be retrieved, and can be exposed
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to just internal networks easier. The served metrics are available
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over HTTP only, and will be available at <code>/_synapse/metrics</code>.</p>
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<p>Add a new listener to homeserver.yaml:</p>
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<pre><code class="language-yaml"> listeners:
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- type: metrics
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port: 9000
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bind_addresses:
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- '0.0.0.0'
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</code></pre>
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<p>For both options, you will need to ensure that <code>enable_metrics</code> is
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set to <code>True</code>.</p>
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</li>
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<li>
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<p>Restart Synapse.</p>
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</li>
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<li>
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<p>Add a Prometheus target for Synapse.</p>
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<p>It needs to set the <code>metrics_path</code> to a non-default value (under
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<code>scrape_configs</code>):</p>
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<pre><code class="language-yaml"> - job_name: "synapse"
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scrape_interval: 15s
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metrics_path: "/_synapse/metrics"
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static_configs:
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- targets: ["my.server.here:port"]
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</code></pre>
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<p>where <code>my.server.here</code> is the IP address of Synapse, and <code>port</code> is
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the listener port configured with the <code>metrics</code> resource.</p>
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<p>If your prometheus is older than 1.5.2, you will need to replace
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<code>static_configs</code> in the above with <code>target_groups</code>.</p>
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</li>
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<li>
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<p>Restart Prometheus.</p>
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</li>
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<li>
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<p>Consider using the <a href="https://github.com/matrix-org/synapse/tree/master/contrib/grafana/">grafana dashboard</a>
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and required <a href="https://github.com/matrix-org/synapse/tree/master/contrib/prometheus/">recording rules</a> </p>
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</li>
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</ol>
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<h2 id="monitoring-workers"><a class="header" href="#monitoring-workers">Monitoring workers</a></h2>
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<p>To monitor a Synapse installation using <a href="workers.html">workers</a>,
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every worker needs to be monitored independently, in addition to
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the main homeserver process. This is because workers don't send
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their metrics to the main homeserver process, but expose them
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directly (if they are configured to do so).</p>
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<p>To allow collecting metrics from a worker, you need to add a
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<code>metrics</code> listener to its configuration, by adding the following
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under <code>worker_listeners</code>:</p>
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<pre><code class="language-yaml"> - type: metrics
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bind_address: ''
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port: 9101
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</code></pre>
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<p>The <code>bind_address</code> and <code>port</code> parameters should be set so that
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the resulting listener can be reached by prometheus, and they
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don't clash with an existing worker.
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With this example, the worker's metrics would then be available
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on <code>http://127.0.0.1:9101</code>.</p>
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<p>Example Prometheus target for Synapse with workers:</p>
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<pre><code class="language-yaml"> - job_name: "synapse"
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scrape_interval: 15s
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metrics_path: "/_synapse/metrics"
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static_configs:
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- targets: ["my.server.here:port"]
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labels:
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instance: "my.server"
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job: "master"
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index: 1
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- targets: ["my.workerserver.here:port"]
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labels:
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instance: "my.server"
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job: "generic_worker"
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index: 1
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- targets: ["my.workerserver.here:port"]
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labels:
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instance: "my.server"
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job: "generic_worker"
|
|
index: 2
|
|
- targets: ["my.workerserver.here:port"]
|
|
labels:
|
|
instance: "my.server"
|
|
job: "media_repository"
|
|
index: 1
|
|
</code></pre>
|
|
<p>Labels (<code>instance</code>, <code>job</code>, <code>index</code>) can be defined as anything.
|
|
The labels are used to group graphs in grafana.</p>
|
|
<h2 id="renaming-of-metrics--deprecation-of-old-names-in-12"><a class="header" href="#renaming-of-metrics--deprecation-of-old-names-in-12">Renaming of metrics & deprecation of old names in 1.2</a></h2>
|
|
<p>Synapse 1.2 updates the Prometheus metrics to match the naming
|
|
convention of the upstream <code>prometheus_client</code>. The old names are
|
|
considered deprecated and will be removed in a future version of
|
|
Synapse.</p>
|
|
<table><thead><tr><th>New Name</th><th>Old Name</th></tr></thead><tbody>
|
|
<tr><td>python_gc_objects_collected_total</td><td>python_gc_objects_collected</td></tr>
|
|
<tr><td>python_gc_objects_uncollectable_total</td><td>python_gc_objects_uncollectable</td></tr>
|
|
<tr><td>python_gc_collections_total</td><td>python_gc_collections</td></tr>
|
|
<tr><td>process_cpu_seconds_total</td><td>process_cpu_seconds</td></tr>
|
|
<tr><td>synapse_federation_client_sent_transactions_total</td><td>synapse_federation_client_sent_transactions</td></tr>
|
|
<tr><td>synapse_federation_client_events_processed_total</td><td>synapse_federation_client_events_processed</td></tr>
|
|
<tr><td>synapse_event_processing_loop_count_total</td><td>synapse_event_processing_loop_count</td></tr>
|
|
<tr><td>synapse_event_processing_loop_room_count_total</td><td>synapse_event_processing_loop_room_count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_count_total</td><td>synapse_util_metrics_block_count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_time_seconds_total</td><td>synapse_util_metrics_block_time_seconds</td></tr>
|
|
<tr><td>synapse_util_metrics_block_ru_utime_seconds_total</td><td>synapse_util_metrics_block_ru_utime_seconds</td></tr>
|
|
<tr><td>synapse_util_metrics_block_ru_stime_seconds_total</td><td>synapse_util_metrics_block_ru_stime_seconds</td></tr>
|
|
<tr><td>synapse_util_metrics_block_db_txn_count_total</td><td>synapse_util_metrics_block_db_txn_count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_db_txn_duration_seconds_total</td><td>synapse_util_metrics_block_db_txn_duration_seconds</td></tr>
|
|
<tr><td>synapse_util_metrics_block_db_sched_duration_seconds_total</td><td>synapse_util_metrics_block_db_sched_duration_seconds</td></tr>
|
|
<tr><td>synapse_background_process_start_count_total</td><td>synapse_background_process_start_count</td></tr>
|
|
<tr><td>synapse_background_process_ru_utime_seconds_total</td><td>synapse_background_process_ru_utime_seconds</td></tr>
|
|
<tr><td>synapse_background_process_ru_stime_seconds_total</td><td>synapse_background_process_ru_stime_seconds</td></tr>
|
|
<tr><td>synapse_background_process_db_txn_count_total</td><td>synapse_background_process_db_txn_count</td></tr>
|
|
<tr><td>synapse_background_process_db_txn_duration_seconds_total</td><td>synapse_background_process_db_txn_duration_seconds</td></tr>
|
|
<tr><td>synapse_background_process_db_sched_duration_seconds_total</td><td>synapse_background_process_db_sched_duration_seconds</td></tr>
|
|
<tr><td>synapse_storage_events_persisted_events_total</td><td>synapse_storage_events_persisted_events</td></tr>
|
|
<tr><td>synapse_storage_events_persisted_events_sep_total</td><td>synapse_storage_events_persisted_events_sep</td></tr>
|
|
<tr><td>synapse_storage_events_state_delta_total</td><td>synapse_storage_events_state_delta</td></tr>
|
|
<tr><td>synapse_storage_events_state_delta_single_event_total</td><td>synapse_storage_events_state_delta_single_event</td></tr>
|
|
<tr><td>synapse_storage_events_state_delta_reuse_delta_total</td><td>synapse_storage_events_state_delta_reuse_delta</td></tr>
|
|
<tr><td>synapse_federation_server_received_pdus_total</td><td>synapse_federation_server_received_pdus</td></tr>
|
|
<tr><td>synapse_federation_server_received_edus_total</td><td>synapse_federation_server_received_edus</td></tr>
|
|
<tr><td>synapse_handler_presence_notified_presence_total</td><td>synapse_handler_presence_notified_presence</td></tr>
|
|
<tr><td>synapse_handler_presence_federation_presence_out_total</td><td>synapse_handler_presence_federation_presence_out</td></tr>
|
|
<tr><td>synapse_handler_presence_presence_updates_total</td><td>synapse_handler_presence_presence_updates</td></tr>
|
|
<tr><td>synapse_handler_presence_timers_fired_total</td><td>synapse_handler_presence_timers_fired</td></tr>
|
|
<tr><td>synapse_handler_presence_federation_presence_total</td><td>synapse_handler_presence_federation_presence</td></tr>
|
|
<tr><td>synapse_handler_presence_bump_active_time_total</td><td>synapse_handler_presence_bump_active_time</td></tr>
|
|
<tr><td>synapse_federation_client_sent_edus_total</td><td>synapse_federation_client_sent_edus</td></tr>
|
|
<tr><td>synapse_federation_client_sent_pdu_destinations_count_total</td><td>synapse_federation_client_sent_pdu_destinations:count</td></tr>
|
|
<tr><td>synapse_federation_client_sent_pdu_destinations_total</td><td>synapse_federation_client_sent_pdu_destinations:total</td></tr>
|
|
<tr><td>synapse_handlers_appservice_events_processed_total</td><td>synapse_handlers_appservice_events_processed</td></tr>
|
|
<tr><td>synapse_notifier_notified_events_total</td><td>synapse_notifier_notified_events</td></tr>
|
|
<tr><td>synapse_push_bulk_push_rule_evaluator_push_rules_invalidation_counter_total</td><td>synapse_push_bulk_push_rule_evaluator_push_rules_invalidation_counter</td></tr>
|
|
<tr><td>synapse_push_bulk_push_rule_evaluator_push_rules_state_size_counter_total</td><td>synapse_push_bulk_push_rule_evaluator_push_rules_state_size_counter</td></tr>
|
|
<tr><td>synapse_http_httppusher_http_pushes_processed_total</td><td>synapse_http_httppusher_http_pushes_processed</td></tr>
|
|
<tr><td>synapse_http_httppusher_http_pushes_failed_total</td><td>synapse_http_httppusher_http_pushes_failed</td></tr>
|
|
<tr><td>synapse_http_httppusher_badge_updates_processed_total</td><td>synapse_http_httppusher_badge_updates_processed</td></tr>
|
|
<tr><td>synapse_http_httppusher_badge_updates_failed_total</td><td>synapse_http_httppusher_badge_updates_failed</td></tr>
|
|
</tbody></table>
|
|
<h2 id="removal-of-deprecated-metrics--time-based-counters-becoming-histograms-in-0310"><a class="header" href="#removal-of-deprecated-metrics--time-based-counters-becoming-histograms-in-0310">Removal of deprecated metrics & time based counters becoming histograms in 0.31.0</a></h2>
|
|
<p>The duplicated metrics deprecated in Synapse 0.27.0 have been removed.</p>
|
|
<p>All time duration-based metrics have been changed to be seconds. This
|
|
affects:</p>
|
|
<table><thead><tr><th>msec -> sec metrics</th></tr></thead><tbody>
|
|
<tr><td>python_gc_time</td></tr>
|
|
<tr><td>python_twisted_reactor_tick_time</td></tr>
|
|
<tr><td>synapse_storage_query_time</td></tr>
|
|
<tr><td>synapse_storage_schedule_time</td></tr>
|
|
<tr><td>synapse_storage_transaction_time</td></tr>
|
|
</tbody></table>
|
|
<p>Several metrics have been changed to be histograms, which sort entries
|
|
into buckets and allow better analysis. The following metrics are now
|
|
histograms:</p>
|
|
<table><thead><tr><th>Altered metrics</th></tr></thead><tbody>
|
|
<tr><td>python_gc_time</td></tr>
|
|
<tr><td>python_twisted_reactor_pending_calls</td></tr>
|
|
<tr><td>python_twisted_reactor_tick_time</td></tr>
|
|
<tr><td>synapse_http_server_response_time_seconds</td></tr>
|
|
<tr><td>synapse_storage_query_time</td></tr>
|
|
<tr><td>synapse_storage_schedule_time</td></tr>
|
|
<tr><td>synapse_storage_transaction_time</td></tr>
|
|
</tbody></table>
|
|
<h2 id="block-and-response-metrics-renamed-for-0270"><a class="header" href="#block-and-response-metrics-renamed-for-0270">Block and response metrics renamed for 0.27.0</a></h2>
|
|
<p>Synapse 0.27.0 begins the process of rationalising the duplicate
|
|
<code>*:count</code> metrics reported for the resource tracking for code blocks and
|
|
HTTP requests.</p>
|
|
<p>At the same time, the corresponding <code>*:total</code> metrics are being renamed,
|
|
as the <code>:total</code> suffix no longer makes sense in the absence of a
|
|
corresponding <code>:count</code> metric.</p>
|
|
<p>To enable a graceful migration path, this release just adds new names
|
|
for the metrics being renamed. A future release will remove the old
|
|
ones.</p>
|
|
<p>The following table shows the new metrics, and the old metrics which
|
|
they are replacing.</p>
|
|
<table><thead><tr><th>New name</th><th>Old name</th></tr></thead><tbody>
|
|
<tr><td>synapse_util_metrics_block_count</td><td>synapse_util_metrics_block_timer:count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_count</td><td>synapse_util_metrics_block_ru_utime:count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_count</td><td>synapse_util_metrics_block_ru_stime:count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_count</td><td>synapse_util_metrics_block_db_txn_count:count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_count</td><td>synapse_util_metrics_block_db_txn_duration:count</td></tr>
|
|
<tr><td>synapse_util_metrics_block_time_seconds</td><td>synapse_util_metrics_block_timer:total</td></tr>
|
|
<tr><td>synapse_util_metrics_block_ru_utime_seconds</td><td>synapse_util_metrics_block_ru_utime:total</td></tr>
|
|
<tr><td>synapse_util_metrics_block_ru_stime_seconds</td><td>synapse_util_metrics_block_ru_stime:total</td></tr>
|
|
<tr><td>synapse_util_metrics_block_db_txn_count</td><td>synapse_util_metrics_block_db_txn_count:total</td></tr>
|
|
<tr><td>synapse_util_metrics_block_db_txn_duration_seconds</td><td>synapse_util_metrics_block_db_txn_duration:total</td></tr>
|
|
<tr><td>synapse_http_server_response_count</td><td>synapse_http_server_requests</td></tr>
|
|
<tr><td>synapse_http_server_response_count</td><td>synapse_http_server_response_time:count</td></tr>
|
|
<tr><td>synapse_http_server_response_count</td><td>synapse_http_server_response_ru_utime:count</td></tr>
|
|
<tr><td>synapse_http_server_response_count</td><td>synapse_http_server_response_ru_stime:count</td></tr>
|
|
<tr><td>synapse_http_server_response_count</td><td>synapse_http_server_response_db_txn_count:count</td></tr>
|
|
<tr><td>synapse_http_server_response_count</td><td>synapse_http_server_response_db_txn_duration:count</td></tr>
|
|
<tr><td>synapse_http_server_response_time_seconds</td><td>synapse_http_server_response_time:total</td></tr>
|
|
<tr><td>synapse_http_server_response_ru_utime_seconds</td><td>synapse_http_server_response_ru_utime:total</td></tr>
|
|
<tr><td>synapse_http_server_response_ru_stime_seconds</td><td>synapse_http_server_response_ru_stime:total</td></tr>
|
|
<tr><td>synapse_http_server_response_db_txn_count</td><td>synapse_http_server_response_db_txn_count:total</td></tr>
|
|
<tr><td>synapse_http_server_response_db_txn_duration_seconds</td><td>synapse_http_server_response_db_txn_duration:total</td></tr>
|
|
</tbody></table>
|
|
<h2 id="standard-metric-names"><a class="header" href="#standard-metric-names">Standard Metric Names</a></h2>
|
|
<p>As of synapse version 0.18.2, the format of the process-wide metrics has
|
|
been changed to fit prometheus standard naming conventions. Additionally
|
|
the units have been changed to seconds, from miliseconds.</p>
|
|
<table><thead><tr><th>New name</th><th>Old name</th></tr></thead><tbody>
|
|
<tr><td>process_cpu_user_seconds_total</td><td>process_resource_utime / 1000</td></tr>
|
|
<tr><td>process_cpu_system_seconds_total</td><td>process_resource_stime / 1000</td></tr>
|
|
<tr><td>process_open_fds (no 'type' label)</td><td>process_fds</td></tr>
|
|
</tbody></table>
|
|
<p>The python-specific counts of garbage collector performance have been
|
|
renamed.</p>
|
|
<table><thead><tr><th>New name</th><th>Old name</th></tr></thead><tbody>
|
|
<tr><td>python_gc_time</td><td>reactor_gc_time</td></tr>
|
|
<tr><td>python_gc_unreachable_total</td><td>reactor_gc_unreachable</td></tr>
|
|
<tr><td>python_gc_counts</td><td>reactor_gc_counts</td></tr>
|
|
</tbody></table>
|
|
<p>The twisted-specific reactor metrics have been renamed.</p>
|
|
<table><thead><tr><th>New name</th><th>Old name</th></tr></thead><tbody>
|
|
<tr><td>python_twisted_reactor_pending_calls</td><td>reactor_pending_calls</td></tr>
|
|
<tr><td>python_twisted_reactor_tick_time</td><td>reactor_tick_time</td></tr>
|
|
</tbody></table>
|
|
|
|
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