Re: Help me in reducing the CPU cost for the high cost query below,as it is hitting production seriously!!

Hi Matthew,

Yeah and you said right!. I have analyzed the entire database and also
created appropriate indexes for the columns used in WHERE/JOIN clauses.

Okay I will just provide the fourth union part of the query which you can
analyze easier(this not that big).

Please find the query part. And refer to the table definitions in my
previous posts.
Query:

select 
                0 as id,
                header.id as header_id,
                '0' as emp_id,
                 0 as sno,
                users.alias_id as alias,
                partner.name as name,
                (select SUM( floor(effort_hours) + ( (effort_hours -
floor(effort_hours)) / 0.6 ))
                    from tms_timesheet_details where work_order_no != 'CORPORATE' and
res_employee_id=users.res_employee_id and date in (select date::date from
generate_series((select start_date from tms_timesheet_period where
id=127),(select end_date from tms_timesheet_period where id=127),'1
day'::interval) date)) billed_hrs,
                (select SUM( floor(effort_hours) + ( (effort_hours -
floor(effort_hours)) / 0.6 ))
                    from tms_timesheet_details where release_no = 'unbillable_time' and
res_employee_id=users.res_employee_id and date in (select date::date from
generate_series((select start_date from tms_timesheet_period where
id=127),(select end_date from tms_timesheet_period where id=127),'1
day'::interval) date)) as unbilled_hrs,
                (select SUM( floor(effort_hours) + ( (effort_hours -
floor(effort_hours)) / 0.6 ))
                    from tms_timesheet_details where release_no = 'paid_time_off' and
res_employee_id=users.res_employee_id and date in (select date::date from
generate_series((select start_date from tms_timesheet_period where
id=127),(select end_date from tms_timesheet_period where id=127),'1
day'::interval) date)) as paid_time_off,
                (select SUM( floor(effort_hours) + ( (effort_hours -
floor(effort_hours)) / 0.6 ))
                    from tms_timesheet_details where release_no = 'unpaid_leave' and
res_employee_id=users.res_employee_id and date in (select date::date from
generate_series((select start_date from tms_timesheet_period where
id=127),(select end_date from tms_timesheet_period where id=127),'1
day'::interval) date)) as unpaid_leave,
                (select SUM( floor(effort_hours) + ( (effort_hours -
floor(effort_hours)) / 0.6 ))
                    from tms_timesheet_details where release_no = 'bereavement_time' and
res_employee_id=users.res_employee_id and date in (select date::date from
generate_series((select start_date from tms_timesheet_period where
id=127),(select end_date from tms_timesheet_period where id=127),'1
day'::interval) date)) as breavement_time,
                (select SUM( floor(effort_hours) + ( (effort_hours -
floor(effort_hours)) / 0.6 ))
                    from tms_timesheet_details where res_employee_id=users.res_employee_id
and  date >='2018-04-16' and date <='2018-04-30' and release_no in
('sick_leave','casual_leave','privilege_leave','optional_holiday') ) as
leave,
                'Not Submitted' state,
                header.res_employee_id as header_emp_id,
                'Not Submitted' as header_status
                
                from res_users users,
                    res_partner partner,
                    tms_timesheet_status status,
                    tms_timesheet_header header
                    
                where 
                    header.res_employee_id=users.res_employee_id
                    and  status.id=header.status_id
                    and users.partner_id=partner.id
                    and status.name='Draft'
                    and header.timesheet_period_id=127
                    and header.res_employee_id in ('14145', '14147',
'ON-14148', '11331', '11332', '11333', 'ON-11334', '65432', '65416',
'54643', '23266', '4681', '56464', '64649', '89564', '98798', '13333',
'44466', '87852', '65464', '65464', '44655', '8201', '65465', 'ON-78785',
'13233', 'ON-5544', 'ON-54654', '23131', '98765', '25134', '13218', '84645',
'4687', '6546', '4988', '89796', '79878', '7198', '15726', '2132', '5310',
'13056', '4446', '16825', '16740', '3912', '19601', '13200', '12981',
'ON-3332', '13166', 'ON-3144', 'ON-1251', 'ON-2799', 'ON-2338', '7286',
'ON-2381', 'ON-3102', 'ON-2938', '64782', '5407', '54641', '46379',
'G151151', '5007', '6011', '5050', '20869', '20204', '12410', '10488',
'14582', '13574', '12982', '7884', '7788', '13417', '7922', '16744',
'16746', '16756', '8292', '16745', '19989', '8297', '5020', '14184',
'17161', '20767', '20753', '20289', '19979', '19975', '20272', '4292',
'G9341010', '14791', '5121', 'ON-1767', 'ON-581', 'ON-700', 'ON-437',
'ON-562', 'ON-1726', 'OFF-1060', 'ON-147', 'OFF-612', 'OFF-635', 'OFF-857',
'ON-900280', 'ON-1934', 'ON-1922', 'ON-2258', 'OFF-2537', 'ON-2872',
'ON-2450', 'ON-2265', 'OFF-2900', 'ON-2551', 'ON-1867', 'ON-2086',
'ON-2348', 'OFF-2706', 'ON-2244', 'ON-2134', 'ON-2654', 'ON-2346',
'ON-1984', 'ON-1243', 'OFF-1266', 'ON-1276', 'ON-2452', 'ON-2179',
'ON-2931', 'ON-2164', 'ON-2468', 'ON-1473', 'ON-1481', 'ON-1521', 'ON-2455',
'ON-2104', 'ON-2295', 'ON-1540', 'ON-900501', 'ON-1351', 'OFF-1364',
'ON-2704', 'ON-1757', 'ON-1690', 'ON-1670', 'ON-1671', 'ON-1689', 'ON-1704',
'ON-1714', 'ON-1655', 'ON-1709', 'ON-1737', 'ON-1725', 'ON-1750', 'ON-1731',
'ON-1715', 'ON-1745', 'ON-1751', 'ON-2191', 'OFF-2686', 'ON-1815',
'ON-2052', 'ON-2019', 'ON-1820', 'ON-1717', 'ON-1713', 'ON-1661',
'OFF-1664', 'ON-1703', 'ON-1734', 'ON-1735', 'ON-1656', 'ON-1705',
'ON-1733', 'ON-1708', 'ON-1666', 'ON-1667', 'ON-1658', 'ON-900487',
'ON-900214', 'ON-1676', 'ON-2378', 'ON-1654', 'ON-2417', 'ON-1488',
'ON-1500', 'ON-1506', 'ON-2875', 'ON-1531', 'ON-2099', 'ON-2195', 'ON-2038',
'ON-1490', 'ON-1489', 'ON-1501', 'ON-1627', 'ON-1929', 'ON-900431',
'ON-1462', 'ON-1466', 'OFF-1468', 'ON-1420', 'ON-1479', 'ON-900543',
'ON-1485', 'ON-1493', 'ON-2347', 'ON-1499', 'ON-2324', 'ON-2733', 'ON-1736',
'ON-1720', 'ON-1674', 'ON-1849', 'ON-1836', 'ON-1846', 'ON-2140',
'OFF-2856', 'ON-2128', 'OFF-2524', 'ON-1845', 'ON-2336', 'ON-1945',
'ON-2008', 'ON-1900', 'ON-2117', 'ON-1837', 'ON-2199', 'ON-2200', 'ON-1821',
'ON-2060', 'ON-1804', 'ON-1803', 'ON-2364', 'ON-2068', 'ON-2474', 'ON-1895',
'ON-1838', 'ON-2024', 'ON-2653', 'ON-1621', 'OFF-1145', 'OFF-994',
'OFF-999', 'ON-1003', 'ON-812', 'OFF-1033', 'ON-1048', 'OFF-1058',
'ON-1053', 'ON-1071', 'ON-1088', 'ON-256', 'ON-207', 'ON-206', 'ON-184',
'OFF-268', 'ON-285', 'OFF-286', 'ON-649', 'ON-301', 'OFF-645', 'ON-338',
'OFF-323', 'ON-347', 'ON-351', 'ON-350', 'ON-354', 'ON-719', 'ON-723',
'ON-137', 'ON-112', 'ON-141', 'ON-752', 'ON-791', 'OFF-802', 'OFF-822',
'ON-573', 'ON-616', 'OFF-587', 'ON-641', 'ON-664', 'ON-336', 'OFF-676',
'ON-687', 'ON-695', 'ON-439', 'ON-406', 'ON-659', 'OFF-890', 'ON-900',
'ON-935', 'ON-228', 'ON-942', 'ON-954', 'OFF-957', 'ON-961', 'ON-830',
'OFF-966', 'OFF-969', 'OFF-951', 'ON-1043', 'OFF-1042', 'ON-1055',
'ON-1109', 'ON-2212', 'ON-2036', 'OFF-1221', 'ON-1238', 'ON-1331',
'OFF-1353', 'ON-1343', 'ON-2014', 'ON-1995', 'ON-2133', 'OFF-2189',
'ON-1581', 'OFF-1595', 'ON-1556', 'ON-1580', 'OFF-1591', 'ON-2437',
'ON-900466', 'ON-1611', 'OFF-1612', 'ON-1624', 'ON-2765', 'ON-1927',
'ON-2361', 'ON-2054', 'ON-1633', 'ON-1503', 'OFF-2546', 'ON-1512',
'ON-1536', 'ON-2543', 'ON-2558', 'ON-2237', 'ON-1535', 'ON-2436',
'OFF-1547', 'ON-2380', 'ON-2116', 'ON-2820', 'ON-1563', 'ON-900512',
'ON-1568', 'ON-1570', 'ON-900514', 'ON-1130', 'ON-1632', 'ON-2359',
'ON-3176', 'ON-2132', 'ON-2012', 'ON-1762', 'ON-900230', 'ON-2299',
'ON-3552', 'ON-2557', 'ON-2129', 'ON-1918', 'OFF-2552', 'ON-2235',
'OFF-2773', 'ON-2123', 'ON-2658', 'ON-1866', 'ON-2506', 'OFF-2703',
'ON-2882', 'ON-2649', 'ON-2997', 'ON-1925', 'OFF-3096', 'ON-3297',
'ON-3359', 'ON-3352', 'ON-3357', 'ON-3378', 'ON-3071', 'OFF-2702',
'ON-2801', 'ON-2689', 'ON-2416', 'ON-3305', 'OFF-2695', 'ON-2069',
'ON-3318', 'OFF-3681', 'ON-1541', 'ON-2248', 'ON-2249', 'ON-2250',
'ON-2259', 'ON-2280', 'ON-3345', 'OFF-3545', 'ON-2286', 'ON-2293',
'ON-2277', 'ON-1180', 'ON-2304', 'OFF-3575', 'OFF-2384', 'OFF-2513',
'ON-2444', 'OFF-3218', 'ON-2497', 'ON-2708', 'ON-2774', 'ON-2667',
'ON-2803', 'OFF-3044', 'ON-2290', 'ON-2791', 'ON-2810', 'ON-2767',
'ON-2415', 'ON-2489', 'ON-2180', 'ON-2131', 'ON-2207', 'ON-2233', 'ON-3045',
'ON-3675', 'ON-2260', 'ON-2700', 'ON-2418', 'ON-2924', 'OFF-2828',
'ON-2536', 'ON-3127', 'ON-2472', 'ON-2482', 'ON-3098', 'ON-2473', 'ON-3073',
'ON-2855', 'OFF-2709', 'ON-2789', 'ON-2589', 'ON-2409', 'ON-3455',
'OFF-3556', 'ON-2510', 'ON-3120', 'ON-2457', 'ON-2303', 'ON-2044',
'ON-2313', 'ON-2326', 'ON-2312', 'OFF-2391', 'ON-2438', 'OFF-3548',
'ON-2581', 'ON-2525', 'ON-2538', 'ON-2433', 'ON-3300', 'ON-2487', 'ON-2754',
'OFF-3049', 'ON-2370', 'ON-3151', 'ON-3100', 'ON-3101', 'ON-1044',
'ON-2431', 'ON-2371', 'ON-2714', 'OFF-3544', 'OFF-2388', 'ON-2790',
'OFF-2918', 'ON-2681', 'ON-2512', 'ON-2511', 'ON-2521', 'OFF-2539',
'ON-3551', 'OFF-3549', 'OFF-3462', 'ON-2745', 'ON-2778', 'OFF-2821',
'ON-900498', 'ON-2812', 'OFF-2955', 'ON-2840', 'ON-2847', 'ON-3309',
'OFF-2917', 'OFF-2857', 'ON-2795', 'ON-2793', 'ON-2796', 'ON-2873',
'ON-2874', 'OFF-2870', 'ON-2889', 'ON-2719', 'ON-2824', 'ON-2861',
'ON-2865', 'ON-2866', 'OFF-2826', 'OFF-2898', 'ON-3301', 'OFF-2961',
'ON-2878', 'OFF-2886', 'ON-2914', 'ON-2909', 'OFF-2906', 'ON-2922',
'OFF-3682', 'ON-2937', 'ON-2913', 'OFF-2916', 'ON-2923', 'OFF-3006',
'OFF-3046', 'OFF-3042', 'OFF-3050', 'OFF-2642', 'ON-3093', 'ON-2685',
'OFF-3112', 'ON-3576', 'OFF-3094', 'OFF-3126', 'ON-3129', 'ON-3152',
'ON-3153', 'ON-3171', 'ON-3177', 'ON-3217', 'ON-2617', 'ON-3654', 'ON-3677',
'ON-1817', 'ON-3684', 'ON-3686', 'ON-3685', 'ON-3278', 'ON-3317', 'ON-3316',
'ON-3325', 'ON-3349', 'ON-3351', 'ON-3391', 'ON-3398', 'ON-3451', 'ON-3414',
'ON-3452', 'ON-3412', 'ON-3453', 'ON-3417', 'OFF-3473', 'ON-3457',
'ON-3523', 'ON-3546', 'ON-3554', 'ON-3553', 'ON-900552', 'G12941370',
'6479', '14192', '87546', '19755', '16751', '2095', '12244', '12363',
'17510', '19935', '7973', '13189', '19733', '19928', '21124', '16725',
'7244', '3027', '11426', '12732', '8530', '10301', '19555', '19706',
'20097', '13156', '14690', '4183', '8340', '18026', '12297', '6577',
'11301', '12980', '18138', '5603', '17587', '19118', '12210', '7292',
'17577', '16578', '7895', '200186', '20100', '34541', '19370', '11111',
'1492', '1111', '2556', '3445643643', '20379', 'ON-2338P', '20899')


And the explain plan for the above query can be found in the below link.
Link: https://explain.depesz.com/s/y3J8 <http://>  

Please help me tune this query or logic to rewrite at the painful area in
the query.

Thanks in Advance!

Regards,
Pavan









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Sent from: http://www.postgresql-archive.org/PostgreSQL-performance-f2050081.html