dist/win-x64/postgres-standalone/share/extension/system_stats--1.0.sql

@@ -0,0 +1,219 @@
+/* system statistics extension */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION system_stats" to load this file. \quit
+
+-- role to be assigned while executing functions of system stats
+-- before creating role, check the role exists or not. It may possible
+-- that user want to create extension in multiple database of same server
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'monitor_system_stats') THEN
+        CREATE ROLE monitor_system_stats WITH
+            NOLOGIN
+            NOSUPERUSER
+            NOCREATEDB
+            NOCREATEROLE
+            INHERIT
+            NOREPLICATION
+            CONNECTION LIMIT -1;
+    END IF;
+END
+$$;
+
+-- Operating system information function
+CREATE FUNCTION pg_sys_os_info(
+    OUT name text,
+    OUT version text,
+    OUT host_name text,
+    OUT domain_name text,
+    OUT handle_count int,
+    OUT process_count int,
+    OUT thread_count int,
+    OUT architecture text,
+    OUT last_bootup_time text,
+    OUT os_up_since_seconds int
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_os_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_os_info() TO monitor_system_stats;
+
+-- System CPU information function
+CREATE FUNCTION pg_sys_cpu_info(            
+    OUT vendor text,
+    OUT description text,
+    OUT model_name text,
+    OUT processor_type int,
+    OUT logical_processor int,
+    OUT physical_processor int,
+    OUT no_of_cores int,
+    OUT architecture text,
+    OUT clock_speed_hz int8,
+    OUT cpu_type text,
+    OUT cpu_family text,
+    OUT byte_order text,
+    OUT l1dcache_size int,
+    OUT l1icache_size int,
+    OUT l2cache_size int,
+    OUT l3cache_size int
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_cpu_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_cpu_info() TO monitor_system_stats; 
+
+-- Memory information function
+CREATE FUNCTION pg_sys_memory_info(
+    OUT total_memory int8,
+    OUT used_memory int8,
+    OUT free_memory int8,
+    OUT swap_total int8,
+    OUT swap_used int8,
+    OUT swap_free int8,
+    OUT cache_total int8,
+    OUT kernel_total int8,
+    OUT kernel_paged int8,
+    OUT kernel_non_paged int8,
+    OUT total_page_file int8,
+    OUT avail_page_file int8            
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_memory_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_memory_info() TO monitor_system_stats;
+
+-- Load average information function
+CREATE FUNCTION pg_sys_load_avg_info(
+    OUT load_avg_one_minute float4,
+    OUT load_avg_five_minutes float4,
+    OUT load_avg_ten_minutes float4,
+    OUT load_avg_fifteen_minutes float4
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_load_avg_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_load_avg_info() TO monitor_system_stats;
+
+-- network information function
+CREATE FUNCTION pg_sys_network_info(
+    OUT interface_name text,
+    OUT ip_address text,
+    OUT tx_bytes int8,
+    OUT tx_packets int8,
+    OUT tx_errors int8,
+    OUT tx_dropped int8,
+    OUT rx_bytes int8,
+    OUT rx_packets int8,
+    OUT rx_errors int8,
+    OUT rx_dropped int8,
+    OUT link_speed_mbps int
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_network_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_network_info() TO monitor_system_stats;
+
+-- CPU and memory information by process id or name
+CREATE FUNCTION pg_sys_cpu_memory_by_process(
+    OUT pid int,
+    OUT name text,
+    OUT running_since_seconds int8,
+    OUT cpu_usage float4,
+    OUT memory_usage float4,
+    OUT memory_bytes int8
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_cpu_memory_by_process() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_cpu_memory_by_process() TO monitor_system_stats;
+
+-- Disk information function
+CREATE FUNCTION pg_sys_disk_info(
+    OUT mount_point text,
+    OUT file_system text,
+    OUT drive_letter text,
+    OUT drive_type int,
+    OUT file_system_type text,
+    OUT total_space int8,
+    OUT used_space int8,
+    OUT free_space int8,
+    OUT total_inodes int8,
+    OUT used_inodes int8,
+    OUT free_inodes int8
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_disk_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_disk_info() TO monitor_system_stats;
+
+-- process information function
+CREATE FUNCTION pg_sys_process_info(
+    OUT total_processes int,
+    OUT running_processes int,
+    OUT sleeping_processes int,
+    OUT stopped_processes int,
+    OUT zombie_processes int
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_process_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_process_info() TO monitor_system_stats;
+
+-- CPU usage information function
+-- This function will fetch the time spent in percentage by CPU in each mode
+-- as described by arguments
+CREATE FUNCTION pg_sys_cpu_usage_info(
+    OUT usermode_normal_process_percent float4,
+    OUT usermode_niced_process_percent float4,
+    OUT kernelmode_process_percent float4,
+    OUT idle_mode_percent float4,
+    OUT IO_completion_percent float4,
+    OUT servicing_irq_percent float4,
+    OUT servicing_softirq_percent float4,
+    OUT user_time_percent float4,
+    OUT processor_time_percent float4,
+    OUT privileged_time_percent float4,
+    OUT interrupt_time_percent float4
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_cpu_usage_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_cpu_usage_info() TO monitor_system_stats;
+
+-- IO analysis information function
+CREATE FUNCTION pg_sys_io_analysis_info(
+	OUT device_name text,
+	OUT total_reads int8,
+	OUT total_writes int8,
+	OUT read_bytes int8,
+	OUT write_bytes int8,
+	OUT read_time_ms int8,
+	OUT write_time_ms int8
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+REVOKE ALL ON FUNCTION pg_sys_io_analysis_info() FROM PUBLIC;
+GRANT EXECUTE ON FUNCTION pg_sys_io_analysis_info() TO monitor_system_stats;
+
+