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13decdbf96
We aren't ready to release this yet, so I'm reverting it for now. This reverts commit d1679a4ed7947b0814e0f2af9b888a16c588f1a1, reversing changes made to e089100c6231541c446e37e157dec8feed02d283.
116 lines
5.4 KiB
ReStructuredText
116 lines
5.4 KiB
ReStructuredText
How to monitor Synapse metrics using Prometheus
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===============================================
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1. Install prometheus:
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Follow instructions at http://prometheus.io/docs/introduction/install/
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2. Enable synapse metrics:
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Simply setting a (local) port number will enable it. Pick a port.
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prometheus itself defaults to 9090, so starting just above that for
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locally monitored services seems reasonable. E.g. 9092:
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Add to homeserver.yaml::
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metrics_port: 9092
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Also ensure that ``enable_metrics`` is set to ``True``.
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Restart synapse.
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3. Add a prometheus target for synapse.
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It needs to set the ``metrics_path`` to a non-default value (under ``scrape_configs``)::
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- job_name: "synapse"
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metrics_path: "/_synapse/metrics"
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static_configs:
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- targets: ["my.server.here:9092"]
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If your prometheus is older than 1.5.2, you will need to replace
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``static_configs`` in the above with ``target_groups``.
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Restart prometheus.
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Block and response metrics renamed for 0.27.0
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---------------------------------------------
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Synapse 0.27.0 begins the process of rationalising the duplicate ``*:count``
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metrics reported for the resource tracking for code blocks and HTTP requests.
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At the same time, the corresponding ``*:total`` metrics are being renamed, as
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the ``:total`` suffix no longer makes sense in the absence of a corresponding
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``:count`` metric.
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To enable a graceful migration path, this release just adds new names for the
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metrics being renamed. A future release will remove the old ones.
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The following table shows the new metrics, and the old metrics which they are
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replacing.
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==================================================== ===================================================
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New name Old name
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==================================================== ===================================================
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synapse_util_metrics_block_count synapse_util_metrics_block_timer:count
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synapse_util_metrics_block_count synapse_util_metrics_block_ru_utime:count
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synapse_util_metrics_block_count synapse_util_metrics_block_ru_stime:count
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synapse_util_metrics_block_count synapse_util_metrics_block_db_txn_count:count
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synapse_util_metrics_block_count synapse_util_metrics_block_db_txn_duration:count
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synapse_util_metrics_block_time_seconds synapse_util_metrics_block_timer:total
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synapse_util_metrics_block_ru_utime_seconds synapse_util_metrics_block_ru_utime:total
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synapse_util_metrics_block_ru_stime_seconds synapse_util_metrics_block_ru_stime:total
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synapse_util_metrics_block_db_txn_count synapse_util_metrics_block_db_txn_count:total
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synapse_util_metrics_block_db_txn_duration_seconds synapse_util_metrics_block_db_txn_duration:total
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synapse_http_server_response_count synapse_http_server_requests
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synapse_http_server_response_count synapse_http_server_response_time:count
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synapse_http_server_response_count synapse_http_server_response_ru_utime:count
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synapse_http_server_response_count synapse_http_server_response_ru_stime:count
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synapse_http_server_response_count synapse_http_server_response_db_txn_count:count
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synapse_http_server_response_count synapse_http_server_response_db_txn_duration:count
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synapse_http_server_response_time_seconds synapse_http_server_response_time:total
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synapse_http_server_response_ru_utime_seconds synapse_http_server_response_ru_utime:total
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synapse_http_server_response_ru_stime_seconds synapse_http_server_response_ru_stime:total
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synapse_http_server_response_db_txn_count synapse_http_server_response_db_txn_count:total
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synapse_http_server_response_db_txn_duration_seconds synapse_http_server_response_db_txn_duration:total
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==================================================== ===================================================
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Standard Metric Names
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---------------------
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As of synapse version 0.18.2, the format of the process-wide metrics has been
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changed to fit prometheus standard naming conventions. Additionally the units
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have been changed to seconds, from miliseconds.
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================================== =============================
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New name Old name
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================================== =============================
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process_cpu_user_seconds_total process_resource_utime / 1000
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process_cpu_system_seconds_total process_resource_stime / 1000
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process_open_fds (no 'type' label) process_fds
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================================== =============================
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The python-specific counts of garbage collector performance have been renamed.
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=========================== ======================
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New name Old name
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=========================== ======================
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python_gc_time reactor_gc_time
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python_gc_unreachable_total reactor_gc_unreachable
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python_gc_counts reactor_gc_counts
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=========================== ======================
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The twisted-specific reactor metrics have been renamed.
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==================================== =====================
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New name Old name
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==================================== =====================
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python_twisted_reactor_pending_calls reactor_pending_calls
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python_twisted_reactor_tick_time reactor_tick_time
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==================================== =====================
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