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0595320c87
We can't call pg_current_wal_lsn() if we are a standby instance (read replica). Any attempt to call this function while in recovery results in: ERROR: recovery is in progress Signed-off-by: Tristan Partin <tristan@neon.tech>
Compute Configuration
These files are the configuration files for various other pieces of software that will be running in the compute alongside Postgres.
sql_exporter
Adding a sql_exporter Metric
We use sql_exporter to export various metrics from Postgres. In order to add
a metric, you will need to create two files: a libsonnet and a sql file. You
will then import the libsonnet file in one of the collector files, and the
sql file will be imported in the libsonnet file.
In the event your statistic is an LSN, you may want to cast it to a float8
because Prometheus only supports floats. It's probably fine because float8 can
store integers from -2^53 to +2^53 exactly.