2016-01-29 22:53:50 +05:30
|
|
|
# GitLab Performance Monitoring
|
|
|
|
|
|
|
|
|
|
GitLab comes with its own application performance measuring system as of GitLab
|
|
|
|
|
8.4, simply called "GitLab Performance Monitoring". GitLab Performance Monitoring is available in both the
|
|
|
|
|
Community and Enterprise editions.
|
|
|
|
|
|
|
|
|
|
Apart from this introduction, you are advised to read through the following
|
|
|
|
|
documents in order to understand and properly configure GitLab Performance Monitoring:
|
|
|
|
|
|
|
|
|
|
- [GitLab Configuration](gitlab_configuration.md)
|
2016-06-02 11:05:42 +05:30
|
|
|
- [InfluxDB Install/Configuration](influxdb_configuration.md)
|
2016-01-29 22:53:50 +05:30
|
|
|
- [InfluxDB Schema](influxdb_schema.md)
|
2016-06-02 11:05:42 +05:30
|
|
|
- [Grafana Install/Configuration](grafana_configuration.md)
|
2016-01-29 22:53:50 +05:30
|
|
|
|
|
|
|
|
## Introduction to GitLab Performance Monitoring
|
|
|
|
|
|
|
|
|
|
GitLab Performance Monitoring makes it possible to measure a wide variety of statistics
|
|
|
|
|
including (but not limited to):
|
|
|
|
|
|
|
|
|
|
- The time it took to complete a transaction (a web request or Sidekiq job).
|
|
|
|
|
- The time spent in running SQL queries and rendering HAML views.
|
|
|
|
|
- The time spent executing (instrumented) Ruby methods.
|
|
|
|
|
- Ruby object allocations, and retained objects in particular.
|
|
|
|
|
- System statistics such as the process' memory usage and open file descriptors.
|
|
|
|
|
- Ruby garbage collection statistics.
|
|
|
|
|
|
|
|
|
|
Metrics data is written to [InfluxDB][influxdb] over [UDP][influxdb-udp]. Stored
|
|
|
|
|
data can be visualized using [Grafana][grafana] or any other application that
|
|
|
|
|
supports reading data from InfluxDB. Alternatively data can be queried using the
|
|
|
|
|
InfluxDB CLI.
|
|
|
|
|
|
|
|
|
|
## Metric Types
|
|
|
|
|
|
|
|
|
|
Two types of metrics are collected:
|
|
|
|
|
|
|
|
|
|
1. Transaction specific metrics.
|
|
|
|
|
1. Sampled metrics, collected at a certain interval in a separate thread.
|
|
|
|
|
|
|
|
|
|
### Transaction Metrics
|
|
|
|
|
|
|
|
|
|
Transaction metrics are metrics that can be associated with a single
|
|
|
|
|
transaction. This includes statistics such as the transaction duration, timings
|
|
|
|
|
of any executed SQL queries, time spent rendering HAML views, etc. These metrics
|
|
|
|
|
are collected for every Rack request and Sidekiq job processed.
|
|
|
|
|
|
|
|
|
|
### Sampled Metrics
|
|
|
|
|
|
|
|
|
|
Sampled metrics are metrics that can't be associated with a single transaction.
|
|
|
|
|
Examples include garbage collection statistics and retained Ruby objects. These
|
|
|
|
|
metrics are collected at a regular interval. This interval is made up out of two
|
|
|
|
|
parts:
|
|
|
|
|
|
|
|
|
|
1. A user defined interval.
|
|
|
|
|
1. A randomly generated offset added on top of the interval, the same offset
|
|
|
|
|
can't be used twice in a row.
|
|
|
|
|
|
|
|
|
|
The actual interval can be anywhere between a half of the defined interval and a
|
|
|
|
|
half above the interval. For example, for a user defined interval of 15 seconds
|
|
|
|
|
the actual interval can be anywhere between 7.5 and 22.5. The interval is
|
|
|
|
|
re-generated for every sampling run instead of being generated once and re-used
|
|
|
|
|
for the duration of the process' lifetime.
|
|
|
|
|
|
|
|
|
|
[influxdb]: https://influxdata.com/time-series-platform/influxdb/
|
|
|
|
|
[influxdb-udp]: https://docs.influxdata.com/influxdb/v0.9/write_protocols/udp/
|
|
|
|
|
[grafana]: http://grafana.org/
|
