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document metrics changes

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Richard van der Hoff 2018-01-16 13:04:01 +00:00
parent 39f4e29d01
commit ee7a1cabd8
2 changed files with 58 additions and 8 deletions
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5
CHANGES.rst
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@ -2,7 +2,10 @@ Unreleased
==========
synctl no longer starts the main synapse when using ``-a`` option with workers.
A new worker file should be added with ``worker_app: synapse.app.homeserver``
A new worker file should be added with ``worker_app: synapse.app.homeserver``.
This release also begins the process of renaming a number of the metrics
reported to prometheus. See `docs/metrics-howto.rst <docs/metrics-howto.rst#block-and-response-metrics-renamed-for-0-27-0>`_.
Changes in synapse v0.26.0 (2018-01-05)

53
docs/metrics-howto.rst
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@ -33,6 +33,53 @@ How to monitor Synapse metrics using Prometheus
Restart prometheus.
Block and response metrics renamed for 0.27.0
---------------------------------------------
Synapse 0.27.0 begins the process of rationalising the duplicate ``*:count``
metrics reported for the resource tracking for code blocks and HTTP requests.
At the same time, the corresponding ``*:total`` metrics are being renamed, as
the ``:total`` suffix no longer makes sense in the absence of a corresponding
``:count`` metric.
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.
The following table shows the new metrics, and the old metrics which they are
replacing.
==================================================== ===================================================
New name Old name
==================================================== ===================================================
synapse_util_metrics_block_count synapse_util_metrics_block_timer:count
synapse_util_metrics_block_count synapse_util_metrics_block_ru_utime:count
synapse_util_metrics_block_count synapse_util_metrics_block_ru_stime:count
synapse_util_metrics_block_count synapse_util_metrics_block_db_txn_count:count
synapse_util_metrics_block_count synapse_util_metrics_block_db_txn_duration:count
synapse_util_metrics_block_time_seconds synapse_util_metrics_block_timer:total
synapse_util_metrics_block_ru_utime_seconds synapse_util_metrics_block_ru_utime:total
synapse_util_metrics_block_ru_stime_seconds synapse_util_metrics_block_ru_stime:total
synapse_util_metrics_block_db_txn_count synapse_util_metrics_block_db_txn_count:total
synapse_util_metrics_block_db_txn_duration_seconds synapse_util_metrics_block_db_txn_duration:total
synapse_http_server_response_count synapse_http_server_requests
synapse_http_server_response_count synapse_http_server_response_time:count
synapse_http_server_response_count synapse_http_server_response_ru_utime:count
synapse_http_server_response_count synapse_http_server_response_ru_stime:count
synapse_http_server_response_count synapse_http_server_response_db_txn_count:count
synapse_http_server_response_count synapse_http_server_response_db_txn_duration:count
synapse_http_server_response_time_seconds synapse_http_server_response_time:total
synapse_http_server_response_ru_utime_seconds synapse_http_server_response_ru_utime:total
synapse_http_server_response_ru_stime_seconds synapse_http_server_response_ru_stime:total
synapse_http_server_response_db_txn_count synapse_http_server_response_db_txn_count:total
synapse_http_server_response_db_txn_duration_seconds synapse_http_server_response_db_txn_duration:total
==================================================== ===================================================
Standard Metric Names
---------------------
@ -42,7 +89,7 @@ have been changed to seconds, from miliseconds.
================================== =============================
New name Old name
---------------------------------- -----------------------------
================================== =============================
process_cpu_user_seconds_total process_resource_utime / 1000
process_cpu_system_seconds_total process_resource_stime / 1000
process_open_fds (no 'type' label) process_fds
@ -52,7 +99,7 @@ The python-specific counts of garbage collector performance have been renamed.
=========================== ======================
New name Old name
--------------------------- ----------------------
=========================== ======================
python_gc_time reactor_gc_time
python_gc_unreachable_total reactor_gc_unreachable
python_gc_counts reactor_gc_counts
@ -62,7 +109,7 @@ The twisted-specific reactor metrics have been renamed.
==================================== =====================
New name Old name
------------------------------------ ---------------------
==================================== =====================
python_twisted_reactor_pending_calls reactor_pending_calls
python_twisted_reactor_tick_time reactor_tick_time
==================================== =====================