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High memory usage when PSQL code SELECT's from stored procedure which modified some data [CORE3895] #4231

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firebird-issue-importer opened this issue Jul 23, 2012 · 7 comments

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@firebird-issue-importer

Submitted by: @hvlad

Test case:

1. create metadata
create table t (id integer not null);

set term ^;

create or alter procedure selproc (p_id integer) returns (id integer)
AS
begin
insert into t values (:p_id);
id = p_id;
suspend;
end
^

create or alter procedure main returns (id integer)
as
declare I integer = 0;
begin
while (i < 1000) do begin
select id from selproc(:i) into :id;
i = i + 1;
end
suspend;
end
^

set term ;^

2. run test and look at memory usage (below i removed not needed stats)
set stat on;

SQL> select * from main;

      ID

============
999

Current memory = 4852448
Delta memory = 257764
Max memory = 4859608

SQL> select * from main;

      ID

============
999

Current memory = 4961764
Delta memory = 109316
Max memory = 4974260

SQL> select * from main;

      ID

============
999

Current memory = 5071132
Delta memory = 109368
Max memory = 5081956

you see - memory usage is incremented at each run by 109368 bytes

SQL> commit;
Current memory = 4735108
Delta memory = -336024
Max memory = 5081956

memory is returned on commit. But it shoud be returned at the statement execution finish.

If replace "select from selproc" by "execute procedure selproc" then there is no such high memory usage.

Commits: 3ec82bd cf91de6 f221651

@firebird-issue-importer
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firebird-issue-importer commented Jul 23, 2012

Modified by: @hvlad

assignee: Vlad Khorsun [ hvlad ]

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firebird-issue-importer commented Jul 23, 2012

Modified by: @hvlad

Version: 2.1.5 [ 10420 ]

Version: 2.1.4 [ 10361 ]

Version: 2.5.0 [ 10221 ]

Version: 2.1.3 [ 10302 ]

Version: 2.1.2 [ 10270 ]

Version: 2.1.1 [ 10223 ]

Version: 2.1.0 [ 10041 ]

Version: 2.5.2 [ 10450 ]

Fix Version: 3.0 Alpha 1 [ 10331 ]

Fix Version: 2.5.3 [ 10461 ]

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firebird-issue-importer commented Jul 23, 2012

Modified by: @hvlad

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 2.1.6 [ 10460 ]

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firebird-issue-importer commented Apr 23, 2013

Modified by: @pcisar

status: Resolved [ 5 ] => Closed [ 6 ]

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firebird-issue-importer commented Jan 18, 2016

Modified by: @pavel-zotov

status: Closed [ 6 ] => Closed [ 6 ]

QA Status: No test

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firebird-issue-importer commented Nov 16, 2016

Modified by: @pavel-zotov

status: Closed [ 6 ] => Closed [ 6 ]

QA Status: No test => Deferred

Test Details: Waiting for reply from hvlad, letter 16.11.2016 09:20.

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firebird-issue-importer commented Nov 17, 2016

Modified by: @pavel-zotov

status: Closed [ 6 ] => Closed [ 6 ]

QA Status: Deferred => Done successfully

Test Details: Waiting for reply from hvlad, letter 16.11.2016 09:20. =>

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