# Accessing specific datafields for Prometheus Exporter

**URL:** <https://discuss.elastic.co/t/accessing-specific-datafields-for-prometheus-exporter/295424>\
**Category:** Beats\
**Tags:** metricbeat\
**Created:** [January 26, 2022, 7:12am UTC](https://discuss.elastic.co/t/accessing-specific-datafields-for-prometheus-exporter/295424 "2022-01-26T07:12:54Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![purple\_key](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/purple_key/32/100880_2.png) [@purple\_key](https://discuss.elastic.co/u/purple_key)\
**Post date:** [January 26, 2022, 7:12am UTC](https://discuss.elastic.co/t/accessing-specific-datafields-for-prometheus-exporter/295424/1 "2022-01-26T07:12:54Z")

</div>

Using [Postgres\_Exporter](https://github.com/prometheus-community/postgres_exporter) on my PSQL servers and piping them to the Prometheus MetricBeat with a sample config of

```auto
# Module: prometheus
# Docs: https://www.elastic.co/guide/en/beats/metricbeat/7.6/metricbeat-module-prometheus.html

- module: prometheus
  period: 10s
  hosts: ["192.168.100.102:9187"]
  metrics_path: '/metrics'

- module: prometheus
  period: 10s
  hosts: ["192.168.100.101:9187"]
  metrics_path: '/metrics'

```

A sample of the metrics collected:

```auto
# HELP pg_stat_database_conflicts Number of queries canceled due to conflicts with recovery in this database. (Conflicts occur only on standby servers; see pg_stat_database_conflicts for details.)
# TYPE pg_stat_database_conflicts counter
pg_stat_database_conflicts{datid="1",datname="template1"} 0
pg_stat_database_conflicts{datid="12136",datname="template0"} 0
pg_stat_database_conflicts{datid="12141",datname="postgres"} 0
pg_stat_database_conflicts{datid="16385",datname="gis"} 0
...
# HELP pg_stat_activity_max_tx_duration max duration in seconds any active transaction has been running
# TYPE pg_stat_activity_max_tx_duration gauge
pg_stat_activity_max_tx_duration{datname="gis",state="active"} 0
pg_stat_activity_max_tx_duration{datname="gis",state="disabled"} 0
pg_stat_activity_max_tx_duration{datname="gis",state="fastpath function call"} 0
pg_stat_activity_max_tx_duration{datname="gis",state="idle"} 0
pg_stat_activity_max_tx_duration{datname="gis",state="idle in transaction"} 0
pg_stat_activity_max_tx_duration{datname="gis",state="idle in transaction (aborted)"} 0
pg_stat_activity_max_tx_duration{datname="postgres",state="active"} 0
pg_stat_activity_max_tx_duration{datname="postgres",state="disabled"} 0
pg_stat_activity_max_tx_duration{datname="postgres",state="fastpath function call"} 0
pg_stat_activity_max_tx_duration{datname="postgres",state="idle"} 0
pg_stat_activity_max_tx_duration{datname="postgres",state="idle in transaction"} 0
pg_stat_activity_max_tx_duration{datname="postgres",state="idle in transaction (aborted)"} 0
pg_stat_activity_max_tx_duration{datname="template0",state="active"} 0
pg_stat_activity_max_tx_duration{datname="template0",state="disabled"} 0
pg_stat_activity_max_tx_duration{datname="template0",state="fastpath function call"} 0
pg_stat_activity_max_tx_duration{datname="template0",state="idle"} 0
pg_stat_activity_max_tx_duration{datname="template0",state="idle in transaction"} 0
pg_stat_activity_max_tx_duration{datname="template0",state="idle in transaction (aborted)"} 0
pg_stat_activity_max_tx_duration{datname="template1",state="active"} 0
pg_stat_activity_max_tx_duration{datname="template1",state="disabled"} 0
pg_stat_activity_max_tx_duration{datname="template1",state="fastpath function call"} 0
pg_stat_activity_max_tx_duration{datname="template1",state="idle"} 0
pg_stat_activity_max_tx_duration{datname="template1",state="idle in transaction"} 0
pg_stat_activity_max_tx_duration{datname="template1",state="idle in transaction (aborted)"} 0

```

How should I get the metrics for the specific databases? Currently, all I see is the generic fieldname, unsure where the value of the field is obtained from.

---

<div class="post-metadata">

**Author:** ![mtojek](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mtojek/32/63863_2.png) [@mtojek](https://discuss.elastic.co/u/mtojek)\
**Post date:** [January 26, 2022, 2:35pm UTC](https://discuss.elastic.co/t/accessing-specific-datafields-for-prometheus-exporter/295424/2 "2022-01-26T14:35:26Z")

</div>

Hi,

could you please post a sample document from Elasticsearch? I'm curious if there is any field that's related to a database name.

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<div class="post-metadata">

**Author:** ![purple\_key](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/purple_key/32/100880_2.png) [@purple\_key](https://discuss.elastic.co/u/purple_key)\
**Post date:** [January 27, 2022, 4:35am UTC](https://discuss.elastic.co/t/accessing-specific-datafields-for-prometheus-exporter/295424/3 "2022-01-27T04:35:15Z")

</div>

There is a label!

Now my timelion expression will be like:

```auto
.es(index=metricbeat-*, 
metric=sum:prometheus.metrics.pg_stat_database_conflicts,
q="service.address:192.168.100.101* AND prometheus.labels.datname:postgres")
    .color(red),

```

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 24, 2022, 6:36am UTC](https://discuss.elastic.co/t/accessing-specific-datafields-for-prometheus-exporter/295424/4 "2022-02-24T06:36:11Z")

</div>

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