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[+] add longest_idle_in_tx_seconds to backends #1613

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[+] add longest_idle_in_tx_seconds to backends #1613

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1704f9e
[+] add longest_idle_in_tx_seconds to backends
pashagolub Oct 22, 2026
5762693
[-] cast fractional backends durations to float in v13 dashboards
pashagolub Oct 22, 2026
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2 changes: 1 addition & 1 deletion grafana/postgres/v13/global-health.json
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Expand Up @@ -58,7 +58,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "SELECT * FROM (\nSELECT\n dbname,\n max((data->>'longest_tx_seconds')::int) AS longest_tx_seconds\nFROM\n backends\nWHERE\n $__timeFilter(\"time\")\nGROUP BY\n dbname\n) x\nWHERE longest_tx_seconds > 0\nORDER BY 2 DESC\nLIMIT $top_limit",
"rawSql": "SELECT * FROM (\nSELECT\n dbname,\n max((data->>'longest_tx_seconds')::float) AS longest_tx_seconds\nFROM\n backends\nWHERE\n $__timeFilter(\"time\")\nGROUP BY\n dbname\n) x\nWHERE longest_tx_seconds > 0\nORDER BY 2 DESC\nLIMIT $top_limit",
"select": [
[
{
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4 changes: 2 additions & 2 deletions grafana/postgres/v13/recommendations.json
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Expand Up @@ -284,7 +284,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "SELECT\n dbname AS \"Source\",\n (SELECT (data->>'value')::int8::text FROM settings_num s WHERE s.dbname = x.dbname AND s.tag_data->>'name' = 'server_version_num' ORDER BY time DESC LIMIT 1) AS \"PostgreSQL Version\",\n 'AUTOVACUUM Workers' AS \"Category\",\n 'If most / all autovacuum worker slots are busy or AV runs for hours then this could hint at incorrect AV params or too much workload' AS \"Recommendation\",\n 'Max. active autovacuum workers: ' || max_av_workers || ' (of total ' || (SELECT (data->>'value')::int FROM settings_num s WHERE s.dbname = x.dbname AND s.tag_data->>'name' = 'autovacuum_max_workers' ORDER BY s.time DESC LIMIT 1) || '); Max. AV duration (seconds): ' || longest_autovacuum_seconds AS \"Additional Info\"\nFROM (\nSELECT\n dbname,\n max((data->>'av_workers')::int) as max_av_workers,\n coalesce(max((data->>'longest_autovacuum_seconds')::int), 0) as longest_autovacuum_seconds\nFROM\n backends\nWHERE\n $__timeFilter(time)\n AND dbname IN ($dbname)\nGROUP BY\n dbname\n) x\nWHERE\n (max_av_workers > 1 AND max_av_workers::numeric / (SELECT (data->>'value')::int FROM settings_num s WHERE s.dbname = x.dbname AND s.tag_data->>'name' = 'autovacuum_max_workers' ORDER BY s.time DESC LIMIT 1) >= 0.6)\n OR\n (longest_autovacuum_seconds > 1800)",
"rawSql": "SELECT\n dbname AS \"Source\",\n (SELECT (data->>'value')::int8::text FROM settings_num s WHERE s.dbname = x.dbname AND s.tag_data->>'name' = 'server_version_num' ORDER BY time DESC LIMIT 1) AS \"PostgreSQL Version\",\n 'AUTOVACUUM Workers' AS \"Category\",\n 'If most / all autovacuum worker slots are busy or AV runs for hours then this could hint at incorrect AV params or too much workload' AS \"Recommendation\",\n 'Max. active autovacuum workers: ' || max_av_workers || ' (of total ' || (SELECT (data->>'value')::int FROM settings_num s WHERE s.dbname = x.dbname AND s.tag_data->>'name' = 'autovacuum_max_workers' ORDER BY s.time DESC LIMIT 1) || '); Max. AV duration (seconds): ' || longest_autovacuum_seconds AS \"Additional Info\"\nFROM (\nSELECT\n dbname,\n max((data->>'av_workers')::int) as max_av_workers,\n coalesce(max((data->>'longest_autovacuum_seconds')::float), 0) as longest_autovacuum_seconds\nFROM\n backends\nWHERE\n $__timeFilter(time)\n AND dbname IN ($dbname)\nGROUP BY\n dbname\n) x\nWHERE\n (max_av_workers > 1 AND max_av_workers::numeric / (SELECT (data->>'value')::int FROM settings_num s WHERE s.dbname = x.dbname AND s.tag_data->>'name' = 'autovacuum_max_workers' ORDER BY s.time DESC LIMIT 1) >= 0.6)\n OR\n (longest_autovacuum_seconds > 1800)",
"select": [
[
{
Expand Down Expand Up @@ -590,7 +590,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "SELECT\n dbname AS \"Source\",\n 'Performance Issue' AS \"Category\",\n 'Long Running Queries' AS \"Objects\",\n 'Long running queries block autovacuum and thereby cause bloat' AS \"Recommendation\",\n 'Longest query duration: '|| max((data->>'longest_query_seconds')::int)::text || ' seconds' AS \"Additional Info\"\nFROM\n backends\nWHERE\n $__timeFilter(time)\n AND dbname IN ($dbname)\n AND (data->>'longest_query_seconds')::int > 0\nGROUP BY\n dbname\nORDER BY\n max((data->>'longest_query_seconds')::int) DESC NULLS LAST, dbname",
"rawSql": "SELECT\n dbname AS \"Source\",\n 'Performance Issue' AS \"Category\",\n 'Long Running Queries' AS \"Objects\",\n 'Long running queries block autovacuum and thereby cause bloat' AS \"Recommendation\",\n 'Longest query duration: '|| max((data->>'longest_query_seconds')::float)::text || ' seconds' AS \"Additional Info\"\nFROM\n backends\nWHERE\n $__timeFilter(time)\n AND dbname IN ($dbname)\n AND (data->>'longest_query_seconds')::float > 0\nGROUP BY\n dbname\nORDER BY\n max((data->>'longest_query_seconds')::float) DESC NULLS LAST, dbname",
"select": [
[
{
Expand Down
180 changes: 172 additions & 8 deletions grafana/postgres/v13/sessions-overview.json
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Original file line number Diff line number Diff line change
Expand Up @@ -651,7 +651,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_query_seconds')::int8) as longest_query,\n max((data->>'avg_query_seconds')::float) as avg_query\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_query_seconds')::float) as longest_query,\n max((data->>'avg_query_seconds')::float) as avg_query\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"select": [
[
{
Expand Down Expand Up @@ -817,7 +817,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_tx_seconds')::int8) as longest_tx,\n max((data->>'avg_tx_seconds')::float) as avg_tx\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_tx_seconds')::float) as longest_tx,\n max((data->>'avg_tx_seconds')::float) as avg_tx\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"select": [
[
{
Expand Down Expand Up @@ -972,6 +972,157 @@
}
}
},
"panel-15": {
"kind": "Panel",
"spec": {
"id": 15,
"title": "Longest idle-in-transaction duration",
"description": "Seconds since the oldest idle-in-transaction client session (aborted ones included) entered that state. Such a session holds its snapshot and locks, so vacuum cannot remove dead rows.",
"links": [],
"data": {
"kind": "QueryGroup",
"spec": {
"queries": [
{
"kind": "PanelQuery",
"spec": {
"query": {
"kind": "DataQuery",
"group": "grafana-postgresql-datasource",
"version": "v0",
"datasource": {
"name": "pgwatch-metrics"
},
"spec": {
"format": "time_series",
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_idle_in_tx_seconds')::float) as longest_idle_in_tx\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"select": [
[
{
"params": [
"value"
],
"type": "column"
}
]
],
"timeColumn": "time",
"where": [
{
"name": "$__timeFilter",
"params": [],
"type": "macro"
}
]
}
},
"refId": "A",
"hidden": false
}
}
],
"transformations": [],
"queryOptions": {}
}
},
"vizConfig": {
"kind": "VizConfig",
"group": "timeseries",
"version": "12.1.0",
"spec": {
"options": {
"legend": {
"calcs": [
"max"
],
"displayMode": "list",
"placement": "bottom",
"showLegend": true
},
"tooltip": {
"hideZeros": false,
"mode": "multi",
"sort": "none"
}
},
"fieldConfig": {
"defaults": {
"unit": "s",
"thresholds": {
"mode": "absolute",
"steps": [
{
"value": 0,
"color": "green"
},
{
"value": 80,
"color": "red"
}
]
},
"color": {
"mode": "palette-classic"
},
"custom": {
"axisBorderShow": false,
"axisCenteredZero": false,
"axisColorMode": "text",
"axisLabel": "",
"axisPlacement": "auto",
"barAlignment": 0,
"barWidthFactor": 0.6,
"drawStyle": "line",
"fillOpacity": 10,
"gradientMode": "none",
"hideFrom": {
"legend": false,
"tooltip": false,
"viz": false
},
"insertNulls": false,
"lineInterpolation": "linear",
"lineWidth": 1,
"pointSize": 5,
"scaleDistribution": {
"type": "linear"
},
"showPoints": "never",
"spanNulls": false,
"stacking": {
"group": "A",
"mode": "none"
},
"thresholdsStyle": {
"mode": "off"
}
}
},
"overrides": [
{
"matcher": {
"id": "byName",
"options": "longest_idle_in_tx"
},
"properties": [
{
"id": "color",
"value": {
"fixedColor": "dark-orange",
"mode": "fixed"
}
}
]
}
]
}
}
}
}
},
"panel-6": {
"kind": "Panel",
"spec": {
Expand All @@ -998,7 +1149,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_autovacuum_seconds')::int8) as longest_autovacuum_seconds\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_autovacuum_seconds')::float) as longest_autovacuum_seconds\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"select": [
[
{
Expand Down Expand Up @@ -1205,7 +1356,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_waiting_seconds')::int8) as longest_waiting,\n max((data->>'avg_waiting_seconds')::float) as avg_waiting\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_waiting_seconds')::float) as longest_waiting,\n max((data->>'avg_waiting_seconds')::float) as avg_waiting\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"select": [
[
{
Expand Down Expand Up @@ -1372,7 +1523,7 @@
"group": [],
"metricColumn": "none",
"rawQuery": true,
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_session_seconds')::int8) as longest_session,\n max((data->>'avg_session_seconds')::float) as avg_session\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"rawSql": "select\n $__timeGroup(time, $agg_interval),\n max((data->>'longest_session_seconds')::float) as longest_session,\n max((data->>'avg_session_seconds')::float) as avg_session\nfrom backends\nwhere dbname = '$dbname' and $__timeFilter(time)\ngroup by 1\norder by 1",
"select": [
[
{
Expand Down Expand Up @@ -1624,7 +1775,7 @@
"height": 6,
"element": {
"kind": "ElementReference",
"name": "panel-8"
"name": "panel-15"
}
}
},
Expand All @@ -1637,7 +1788,7 @@
"height": 6,
"element": {
"kind": "ElementReference",
"name": "panel-6"
"name": "panel-8"
}
}
},
Expand All @@ -1650,7 +1801,7 @@
"height": 6,
"element": {
"kind": "ElementReference",
"name": "panel-10"
"name": "panel-6"
}
}
},
Expand All @@ -1661,6 +1812,19 @@
"y": 50,
"width": 24,
"height": 6,
"element": {
"kind": "ElementReference",
"name": "panel-10"
}
}
},
{
"kind": "GridLayoutItem",
"spec": {
"x": 0,
"y": 56,
"width": 24,
"height": 6,
"element": {
"kind": "ElementReference",
"name": "panel-11"
Expand Down
72 changes: 70 additions & 2 deletions grafana/prometheus/v13/sessions-overview-prometheus.json
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Expand Up @@ -798,6 +798,61 @@
}
}
},
"panel-10": {
"kind": "Panel",
"spec": {
"id": 10,
"title": "Longest idle-in-transaction duration",
"description": "Seconds since the oldest idle-in-transaction client session (aborted ones included) entered that state. Such a session holds its snapshot and locks, so vacuum cannot remove dead rows.",
"links": [],
"data": {
"kind": "QueryGroup",
"spec": {
"queries": [
{
"kind": "PanelQuery",
"spec": {
"query": {
"kind": "DataQuery",
"group": "prometheus",
"version": "v0",
"datasource": {
"name": "pgwatch-prometheus"
},
"spec": {
"exemplar": true,
"expr": "max(max_over_time(pgwatch_backends_longest_idle_in_tx_seconds{dbname='$dbname'}[$agg_interval]))",
"interval": "",
"legendFormat": "Longest idle in TX"
}
},
"refId": "A",
"hidden": false
}
}
],
"transformations": [],
"queryOptions": {
"interval": "$agg_interval"
}
}
},
"vizConfig": {
"kind": "VizConfig",
"group": "timeseries",
"version": "7.5.9",
"spec": {
"options": {
"alertThreshold": true
},
"fieldConfig": {
"defaults": {},
"overrides": []
}
}
}
}
},
"panel-8": {
"kind": "Panel",
"spec": {
Expand Down Expand Up @@ -1062,7 +1117,7 @@
"height": 9,
"element": {
"kind": "ElementReference",
"name": "panel-9"
"name": "panel-10"
}
}
},
Expand All @@ -1075,7 +1130,7 @@
"height": 9,
"element": {
"kind": "ElementReference",
"name": "panel-6"
"name": "panel-9"
}
}
},
Expand All @@ -1086,6 +1141,19 @@
"y": 54,
"width": 24,
"height": 9,
"element": {
"kind": "ElementReference",
"name": "panel-6"
}
}
},
{
"kind": "GridLayoutItem",
"spec": {
"x": 0,
"y": 63,
"width": 24,
"height": 9,
"element": {
"kind": "ElementReference",
"name": "panel-8"
Expand Down
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