48.1. Viewing Main Metrics #
To view graphs associated with metrics:
In the navigation panel, go to Infrastructure → Instances.
Click the name of the instance.
In the navigation panel, go to Metrics.
Select the graphs to be displayed on the page:
Manually:
In the top-left corner of the page, click
Charts. Select the graphs to display.
Click Save.
By selecting one of the presets in the top-left corner of the page.
Default preset: instance overview.
(Optional) In Period, specify the time period.
Default time period: last 3 hours.
(Optional) In the top-right corner of the page, enable or disable the Simultaneous scaling toggle.
The toggle controls whether to maintain a single scale factor for all displayed graphs.
Default value: disabled — the displayed graphs can be scaled independently.
The selected graphs will be displayed. To manage an individual graph:
In the top-right corner of the graph, click Select interval or Reset to change the displayed interval or to reset it, respectively.
In the top-right corner of the graph, click Download PNG or Download SVG to download the graph contents as PNG or SVG, respectively.
In the bottom of the graph, click the legend checkboxes to show or hide the data on the graph.
48.1.1. Graph List #
WAL Archiver: The number of archived WAL segments.
Vacuum workers: The number of vacuum operations.
Background Writes: Buffers: The data volume written in the background from shared cache to disk.
Background Writes: Maxwritten/Fsync:
maxwritten: The number of times the background writer had to stop writing because the limit was reached.
fsync: The number of forced fsync calls.
Background Writes: Checkpoints: The number of checkpoints.
Background Writes: Checkpoints Write/Sync time: The time spent writing and synchronizing blocks during execution of checkpoints.
Instance: Connections: Connections established with the DBMS instance and their state.
Instance: Blocks rate: The number of cache hits and misses that resulted in the need to read data from disk.
Instance: Transactions rate: Transactional activity in the DBMS instance.
Instance: Events: Deadlocks, replication conflicts, and checksum validation errors in the DBMS instance.
Instance: Tuples: The number of rows read, inserted, updated, and deleted.
Instance: Cache hit ratio: The proportion of cache hits relative to all shared cache accesses.
Instance: Temp bytes written: The amount of data written to temporary files.
Instance: Temp files: The number of temporary files written by the DBMS instance.
Instance: Locks: Lock dynamics.
Instance: Wait Events Types: The count of wait events, grouped by type.
The
ClientReadandExtensionwait events, as well as the wait events ofActivityandTimeouttypes, are not displayed in this graph.Instance: Wait Events: The count of wait events.
The
ClientReadandExtensionwait events, as well as the wait events ofActivityandTimeouttypes, are not displayed in this graph.WAL: Written bytes: The number of bytes written to WAL.
System: Load Average: Average server load.
System: Memory Usage: Usage of server memory.
System: Swap Usage: Usage of swap space in the system.
System: Processes: Usage of processes in the system.