Hi everyone,
I am revamping a computer system by Red Hat 6.0 +
PostgreSQL 6.5.3 + ecpg 2.7 + C. The user interface is
perl Pg + Apache. Everything seems fine, but when I
use "top" to display long term CPU processes, I find
the postmaster is getting bigger in step of 4 kb and
performance is getting worse GRADUALLY (It seems that
perl + Pg would make the size expansion more quickly
than ECPG). Here are some data display in "top":
PID SIZE RSS SHARE TIME COMMAND
2526 1260 1260 1040 0:00 postmaster --
when postmaster started
2526 28384 20M 388 4:41 postmaster --
2 days later
I didn't find any error in tracing my program, and
the child postmaster is terminated correctly. I really
can't figure out the reason. Please give me advise.
I have installed the latest version 7.0RC5, but I
find my C program fails in ECPG 2.7 although it works
fine in PostgreSQL 6.5.3, Postmaster is getting bigger
too (perl + Pg), Here is a simple example:
1. I create a table foo_1 and insert 2 rows of data: CREATE TABLE foo_1 ( recno int PRIMARY KEY, --
PRIMARYKEY a1 int, b1 float, spare int ); insert into foo_1
values(1,10,11.1,0); insert into foo_1 values(2,20,22.2,0);
2. I write a program (Test.pgc) to get a whole row
into a structure temp by "select *":
/*
exec sql whenever sqlerror sqlprint;
*/
exec sql include sqlca;
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
main()
{ exec sql begin declare section; struct data { int recno; int a1;
float b1; int spare;
} temp; int PK_INDEX; exec sql end declare section;
exec sql connect to by2db; if (sqlca.sqlcode != 0) { printf ("connect database error =
%s\n",sqlca.sqlerrm.sqlerrmc); exit (-1); }
PK_INDEX = 1; exec sql select * into :temp from foo_1 where recno
= :PK_INDEX; if (sqlca.sqlcode != 0) { printf ("sql_select--foo_1 :
%s\n",sqlca.sqlerrm.sqlerrmc); exit (-1); } printf (" a1 = %d b1 = %f\n",temp.a1,temp.b1);
exec sql disconnect all; exit(0);
}
After executing program(Test), I got different result
in each version of PostgreSQL,
such as:
In PostgreSQL 6.5.3 + ecpg 2.7 : a1 = 10 b1 =
11.100000
In PostgreSQL 7.0RC5 + ecpg 2.7 : sql_select--foo_1
: Too few arguments in line 33.
I would REALLY appreciate some suggestions.
Thanks S.F.Lee
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