Hi,
I guess the memory consumption is depending on the size of my database, so
only giving a reduced version of it won't allow to hit the issue.
The pg_dumpall file of my database can be found at the address
https://gerb.oma.be/owncloud/public.php?service=files&t=5e0e9e1bb06dce1d12c95662a9ee1c03
The queries causing the issue are given in files
- tmp.OqOavPYbHa (with the new upsert_func function)
- tmp.f60wlgEDWB (with WITH .. AS statement)
I hope it will help. Thanks.
Regards,
A.
On Thursday 18 December 2014 12:05:45 Tom Lane wrote:
> Alessandro Ipe <Alessandro.Ipe@xxxxxxxx> writes:
> > Hi,
> > I tried also with an upsert function
> > CREATE FUNCTION upsert_func(sql_insert text, sql_update text) RETURNS void
> >
> > LANGUAGE plpgsql
> > AS $$
> >
> > BEGIN
> > EXECUTE sql_update;
> > IF FOUND THEN
> >
> > RETURN;
> >
> > END IF;
> > BEGIN
> >
> > EXECUTE sql_insert;
> > EXCEPTION WHEN OTHERS THEN
> > EXECUTE sql_update;
> > END;
> >
> > RETURN;
> >
> > END;
> > $$;
> > with the same result on the memory used...
>
> If you want to provide a self-contained test case, possibly we could look
> into it, but these fragmentary bits of what you're doing don't really
> constitute an investigatable problem statement.
>
> I will note that EXCEPTION blocks aren't terribly cheap, so if you're
> reaching the "EXECUTE sql_insert" a lot of times that might have something
> to do with it.
>
> regards, tom lane
\set VERBOSITY terse
\set ON_ERROR_STOP
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081530', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081530', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081530', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080400', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080400', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080400', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302082115', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302082115', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302082115', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080245', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080245', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080245', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080600', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080600', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080600', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081800', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081800', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081800', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081515', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081515', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081515', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080545', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080545', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080545', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081715', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081715', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081715', 'YYYYMMDDHH24MI') and MSG=3 $$);
select upsert_func($$ insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081900', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' $$, $$ update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081900', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081900', 'YYYYMMDDHH24MI') and MSG=3 $$);
\set VERBOSITY terse
\set ON_ERROR_STOP
BEGIN;
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081100', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081100', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081100', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302081100', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080515', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080515', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080515', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302080515', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080815', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080815', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080815', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302080815', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080945', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080945', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080945', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302080945', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080930', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080930', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080930', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302080930', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080200', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080200', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080200', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302080200', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302081430', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302081430', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302081430', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302081430', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302082000', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302082000', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302082000', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302082000', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302080530', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302080530', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302080530', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302080530', 'YYYYMMDDHH24MI') and MSG=3);
WITH upsert AS (update MSG set (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) = (to_timestamp('201302082100', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021') where slot=to_timestamp('201302082100', 'YYYYMMDDHH24MI') and MSG=3 RETURNING *) insert into MSG (slot,MSG,HRV,VIS006,VIS008,IR_016,IR_039,WV_062,WV_073,IR_087,IR_097,IR_108,IR_120,IR_134,PRO,EPI,CLM,TAPE) select to_timestamp('201302082100', 'YYYYMMDDHH24MI'),3,'\xffffff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\xff','\x01','\x01','\x7f','LTO5_021' WHERE NOT EXISTS (SELECT * FROM upsert WHERE slot=to_timestamp('201302082100', 'YYYYMMDDHH24MI') and MSG=3);
COMMIT;
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