Thread: 1024 limits??
Hi, Im building a server that uses libpq to connect to a database and
authenticate the users that connect. I do PQfinish for the conn and PQclear for the result so there cant be
a memory leak there. If I remove the function where I authenticate my server can handle as
much clients as I want.If I authenticate every clients with connections to the database it
crashes on PQconnectdb at th 1024th client without returning an error(it just
segfaults). My ulimit -n is more than 1024 btw.
Did anybody encounter such problem?? I've been trying to fix this one
for a long time...
Thanks -Mat
--
Mathieu Dube
Mondo-Live
www.flipr.com
I just do a select on a user table with the username and password pretty upfront and normal query you would like me to use PQtrace??? it doesnt say much if I do bt on gdb it says: 0x4b3003d in ?? () On Mon, 05 Feb 2001, you wrote: > Mathieu Dube <mathieu_dube@videotron.ca> writes: > > If I remove the function where I authenticate my server can handle as > > much clients as I want. > > Which authentication method do you use? > > > If I authenticate every clients with connections to the database it > > crashes on PQconnectdb at th 1024th client without returning an error(it just > > segfaults). > > Please provide a backtrace from the segfault ... > > regards, tom lane -- Mathieu Dube Mondo-Live www.flipr.com
Mathieu Dube <mathieu_dube@videotron.ca> writes:
> If I remove the function where I authenticate my server can handle as
> much clients as I want.
Which authentication method do you use?
> If I authenticate every clients with connections to the database it
> crashes on PQconnectdb at th 1024th client without returning an error(it just
> segfaults).
Please provide a backtrace from the segfault ...
regards, tom lane
Im currently using rpms is there a way to just remove an rpm(the API one) and compile only that?? where can I find libpq sources? my app is already compiled with -g On Mon, 05 Feb 2001, you wrote: > Mathieu Dube <mathieu_dube@videotron.ca> writes: > > if I do bt on gdb it says: 0x4b3003d in ?? () > > You'll need to recompile libpq and your application with -g in CFLAGS > to get a more useful backtrace from gdb. > > regards, tom lane -- Mathieu Dube Mondo-Live www.flipr.com
You need to compile PostgreSQL from source with -g .. ftp.postgresql.org is the main FTP, there are many mirrors. Look for the source tarball there.. -Mitch ----- Original Message ----- From: "Mathieu Dube" <mathieu_dube@videotron.ca> To: "Tom Lane" <tgl@sss.pgh.pa.us> Cc: <pgsql-hackers@postgresql.org> Sent: Monday, February 05, 2001 11:31 AM Subject: Re: 1024 limits?? > Im currently using rpms > is there a way to just remove an rpm(the API one) and compile only that?? > > where can I find libpq sources? > > my app is already compiled with -g > > On Mon, 05 Feb 2001, you wrote: > > Mathieu Dube <mathieu_dube@videotron.ca> writes: > > > if I do bt on gdb it says: 0x4b3003d in ?? () > > > > You'll need to recompile libpq and your application with -g in CFLAGS > > to get a more useful backtrace from gdb. > > > > regards, tom lane > -- > Mathieu Dube > Mondo-Live > www.flipr.com >
"Mitch Vincent" <mitch@venux.net> writes:
> You need to compile PostgreSQL from source with -g ..
> ftp.postgresql.org is the main FTP, there are many mirrors. Look for the
> source tarball there..
>> Im currently using rpms
>> is there a way to just remove an rpm(the API one) and compile only that??
If you don't want to mess with removing the RPMs, you don't have to.
Build the source with -g, but don't install it. Instead, copy the
static libpq.a library (look in src/interfaces/libpq after building)
to your application directory, and force your app to link against it
instead of against the libpq.so that's in /usr/lib (or whereever the
RPMs installed it).
regards, tom lane
cc -o therver therver.c -g -lflipr -lpq -L. -lpthread -D_REENTRANT ./libpq.a(fe-auth.o): In function `pg_password_sendauth': /usr/local/postgresql-7.0.3/src/interfaces/libpq/fe-auth.c:465: undefined reference to `crypt' collect2: ld returned 1 exit status make: *** [therver] Error 1 this is what I get should I copy other files? On Mon, 05 Feb 2001, you wrote: > "Mitch Vincent" <mitch@venux.net> writes: > > You need to compile PostgreSQL from source with -g .. > > ftp.postgresql.org is the main FTP, there are many mirrors. Look for the > > source tarball there.. > > >> Im currently using rpms > >> is there a way to just remove an rpm(the API one) and compile only that?? > > If you don't want to mess with removing the RPMs, you don't have to. > Build the source with -g, but don't install it. Instead, copy the > static libpq.a library (look in src/interfaces/libpq after building) > to your application directory, and force your app to link against it > instead of against the libpq.so that's in /usr/lib (or whereever the > RPMs installed it). > > regards, tom lane -- Mathieu Dube Mondo-Live www.flipr.com
* Mathieu Dube <mathieu_dube@videotron.ca> [010205 09:32] wrote: > cc -o therver therver.c -g -lflipr -lpq -L. -lpthread -D_REENTRANT > ./libpq.a(fe-auth.o): In function `pg_password_sendauth': > /usr/local/postgresql-7.0.3/src/interfaces/libpq/fe-auth.c:465: undefined reference to `crypt' > collect2: ld returned 1 exit status > make: *** [therver] Error 1 > > this is what I get > should I copy other files? no, just add -lcrypt to your LDFLAGS
Which file should I read the symbol from?? On Mon, 05 Feb 2001, Mitch Vincent wrote: > You need to compile PostgreSQL from source with -g .. > > ftp.postgresql.org is the main FTP, there are many mirrors. Look for the > source tarball there.. > > -Mitch > > ----- Original Message ----- > From: "Mathieu Dube" <mathieu_dube@videotron.ca> > To: "Tom Lane" <tgl@sss.pgh.pa.us> > Cc: <pgsql-hackers@postgresql.org> > Sent: Monday, February 05, 2001 11:31 AM > Subject: Re: 1024 limits?? > > > > Im currently using rpms > > is there a way to just remove an rpm(the API one) and compile only that?? > > > > where can I find libpq sources? > > > > my app is already compiled with -g > > > > On Mon, 05 Feb 2001, you wrote: > > > Mathieu Dube <mathieu_dube@videotron.ca> writes: > > > > if I do bt on gdb it says: 0x4b3003d in ?? () > > > > > > You'll need to recompile libpq and your application with -g in CFLAGS > > > to get a more useful backtrace from gdb. > > > > > > regards, tom lane > > -- > > Mathieu Dube > > Mondo-Live > > www.flipr.com > > -- Mathieu Dube Mondo-Live www.flipr.com
From which file should I load the symbol for gdb??
Thanks -Mat
On Mon, 05 Feb 2001, you wrote:
> "Mitch Vincent" <mitch@venux.net> writes:
> > You need to compile PostgreSQL from source with -g ..
> > ftp.postgresql.org is the main FTP, there are many mirrors. Look for the
> > source tarball there..
>
> >> Im currently using rpms
> >> is there a way to just remove an rpm(the API one) and compile only that??
>
> If you don't want to mess with removing the RPMs, you don't have to.
> Build the source with -g, but don't install it. Instead, copy the
> static libpq.a library (look in src/interfaces/libpq after building)
> to your application directory, and force your app to link against it
> instead of against the libpq.so that's in /usr/lib (or whereever the
> RPMs installed it).
>
> regards, tom lane
--
Mathieu Dube
Mondo-Live
www.flipr.com