Add archive ready and temp file items to template

- Add the initital item definitions to the template for archive ready
  files and temp files.

- Fix the temp file query to be able to return both columns in all
  cases.

sample-config/pgmon-metrics.yml

@@ -116,6 +116,63 @@ metrics:
         FROM pg_stat_io
         GROUP BY backend_type
 
+  temp_files:
+    type: row
+    query:
+      120000: >
+        SELECT count(*) AS count,
+               coalesce(sum(size), 0) AS size
+        FROM pg_ls_tmpdir()
+        WHERE name LIKE 'pgsql_tmp%%'
+      90500: >
+        SELECT count(*) AS count,
+               coalesce(sum((pg_stat_file(name)).size), 0) AS size
+        FROM pg_ls_dir('base/pgsql_tmp/', true, false) AS name
+        WHERE name LIKE 'pgsql_tmp%%'
+      0: >
+          SELECT count(*) AS count,
+                 coalesce(sum((pg_stat_file(files.name)).size), 0) AS size
+          FROM (
+            SELECT name
+            FROM pg_ls_dir('base') AS name
+            WHERE name = 'pgsql_tmp') AS dir
+          LEFT JOIN (
+            SELECT name
+            FROM pg_ls_dir('base/pgsql_tmp/') AS name
+            WHERE name LIKE 'pgsql_tmp%%') AS files
+          ON dir.name IS NOT NULL
+
+
+  ready_archive_files:
+    type: value
+    query:
+      120000: >
+        SELECT count(*) AS count
+        FROM pg_ls_archive_statusdir()
+        WHERE name LIKE '%%.ready'
+      100000: >
+        SELECT count(*) AS count
+        FROM pg_ls_dir('pg_wal/archive_status/', true, false) AS name
+        WHERE name LIKE '%%.ready'
+      90500: >
+        SELECT count(*) AS count
+        FROM pg_ls_dir('pg_xlog/archive_status/', true, false) AS name
+        WHERE name LIKE '%%.ready'
+      0: >
+        SELECT
+          CASE WHEN (
+            SELECT count(*)
+            FROM pg_ls_dir('pg_xlog/') AS f
+            WHERE f = 'archive_status') = 0
+          THEN (
+            SELECT 0 AS count
+          )
+          ELSE (
+            SELECT count(*) AS count
+            FROM pg_ls_dir('pg_xlog/archive_status/') AS name
+            WHERE name LIKE '%%.ready')
+          END
+
 
   ##
   # Per-database metrics
@@ -196,12 +253,28 @@ metrics:
     type: set
     query:
       0: >
-        SELECT state,
+        SELECT
-               count(*) AS backend_count,
+          states.state,
-               COALESCE(EXTRACT(EPOCH FROM max(now() - state_change)), 0) AS max_state_time
+          COALESCE(a.backend_count, 0) AS backend_count,
-        FROM pg_stat_activity
+          COALESCE(a.max_state_time, 0) AS max_state_time
-        WHERE datname = %(dbname)s
+        FROM (
-        GROUP BY state
+          SELECT state,
+                 count(*) AS backend_count,
+                 COALESCE(EXTRACT(EPOCH FROM now() - min(state_change)), 0) AS max_state_time
+          FROM pg_stat_activity
+          WHERE datname = %(dbname)s
+          GROUP BY state
+        ) AS a
+        RIGHT JOIN
+          unnest(ARRAY[
+            'active',
+            'idle',
+            'idle in transaction',
+            'idle in transaction (aborted)',
+            'fastpath function call',
+            'disabled'
+          ]) AS states(state)
+        USING (state);
     test_args:
       dbname: postgres
 
@@ -235,7 +308,7 @@ metrics:
   locks:
     type: row
     query:
-      0:
+      0: >
         SELECT COUNT(*) AS total,
                SUM(CASE WHEN granted THEN 1 ELSE 0 END) AS granted
         FROM pg_locks

zabbix_templates/pgmon_templates.yaml

@@ -282,6 +282,39 @@ zabbix_export:
               expression: 'last(/PostgreSQL by pgmon/pgmon.release.supported)<>1'
               name: 'PostgreSQL major release is lo longer supported'
               priority: INFO
+        - uuid: d0651ffc203949e3a24b1e1a2beb3dd7
+          name: 'Temp file size'
+          type: DEPENDENT
+          key: 'pgmon.temp_files[bytes]'
+          delay: '0'
+          history: 90d
+          units: b
+          description: 'Total size of all temp files'
+          preprocessing:
+            - type: JSONPATH
+              parameters:
+                - $.size
+          master_item:
+            key: 'pgmon[temp_files]'
+          tags:
+            - tag: Application
+              value: PostgreSQL
+        - uuid: deb355b26c37441189c85ac82465f21e
+          name: 'Temp file count'
+          type: DEPENDENT
+          key: 'pgmon.temp_files[count]'
+          delay: '0'
+          history: 90d
+          description: 'Total number of temp flies'
+          preprocessing:
+            - type: JSONPATH
+              parameters:
+                - $.count
+          master_item:
+            key: 'pgmon[temp_files]'
+          tags:
+            - tag: Application
+              value: PostgreSQL
         - uuid: 763920af8da84db8a9a2667d9653cb21
           name: 'PostgreSQL Agent Version'
           type: HTTP_AGENT
@@ -295,6 +328,17 @@ zabbix_export:
           tags:
             - tag: Application
               value: PostgreSQL
+        - uuid: a0bd4a987b7643c5a86e160dd9f9afcb
+          name: 'PostgreSQL Archive ready count'
+          type: HTTP_AGENT
+          key: 'pgmon[archive_ready]'
+          history: 90d
+          trends: '0'
+          description: 'Number of WAL files ready and waiting to be archived'
+          url: 'http://localhost:{$AGENT_PORT}/ready_archive_files'
+          tags:
+            - tag: Application
+              value: PostgreSQL
         - uuid: 91baea76ebb240b19c5a5d3913d0b989
           name: 'PostgreSQL BGWriter Info'
           type: HTTP_AGENT
@@ -369,6 +413,20 @@ zabbix_export:
               value: PostgreSQL
             - tag: Type
               value: Raw
+        - uuid: bd3026ef3b82419d8a004e2d4684554a
+          name: 'PostgreSQL Temp Ffle info'
+          type: HTTP_AGENT
+          key: 'pgmon[temp_files]'
+          history: '0'
+          value_type: TEXT
+          trends: '0'
+          description: 'PostgreSQL temp file stats'
+          url: 'http://localhost:{$AGENT_PORT}/temp_files'
+          tags:
+            - tag: Application
+              value: PostgreSQL
+            - tag: Type
+              value: Raw
         - uuid: ee88f5f4d2384f97946d049af5af4502
           name: 'PostgreSQL version'
           type: HTTP_AGENT
@@ -411,7 +469,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "active")].max_state_time'
+                    - '$[?(@.state == "active")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -429,7 +487,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "active")].backend_count'
+                    - '$[?(@.state == "active")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -448,7 +506,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "disabled")].max_state_time'
+                    - '$[?(@.state == "disabled")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -466,7 +524,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "disabled")].backend_count'
+                    - '$[?(@.state == "disabled")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -485,7 +543,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "fastpath function call")].max_state_time'
+                    - '$[?(@.state == "fastpath function call")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -503,7 +561,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "fastpath function call")].backend_count'
+                    - '$[?(@.state == "fastpath function call")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -522,7 +580,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "idle")].max_state_time'
+                    - '$[?(@.state == "idle")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -540,7 +598,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "idle")].backend_count'
+                    - '$[?(@.state == "idle")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -559,7 +617,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "idle in transaction (aborted)")].max_state_time'
+                    - '$[?(@.state == "idle in transaction (aborted)")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -577,7 +635,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "idle in transaction (aborted)")].backend_count'
+                    - '$[?(@.state == "idle in transaction (aborted)")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -596,7 +654,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "idle in transaction")].max_state_time'
+                    - '$[?(@.state == "idle in transaction")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -614,7 +672,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "idle in transaction")].backend_count'
+                    - '$[?(@.state == "idle in transaction")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -633,7 +691,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "starting")].max_state_time'
+                    - '$[?(@.state == "starting")].max_state_time.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags:
@@ -651,7 +709,7 @@ zabbix_export:
               preprocessing:
                 - type: JSONPATH
                   parameters:
-                    - '$[?(@.state == "starting")].backend_count'
+                    - '$[?(@.state == "starting")].backend_count.first()'
               master_item:
                 key: 'pgmon_connection_states[{#DBNAME}]'
               tags: