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Thread: [GENERAL] Re: Re: [GENERAL] PostgreSQL mirroring from RPM install to Source install

[GENERAL] Re: Re: [GENERAL] PostgreSQL mirroring from RPM install to Source install

From
Richard Brosnahan
Date:

gdb is not available on this machine. Neither which or locate could find it. The servers we're given are truly, shockingly, stripped down models. 

At this point, I believe my best course of action is to twist some sys admin arms and get a properly installed PostgreSQL on this machine. Even if I manage to get the mirror working with the current install, there's a real risk something bad will happen. I can't trust this source built version.

Sigh

Thanks again for your help.
-- 

Richard Brosnahan

On Dec 15, 2016, at 01:00 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:

Richard Brosnahan <broz@mac.com> Re: [GENERAL] PostgreSQL mirroring from RPM install to Source install writes:
The slave:
$ pg_controldata --version
pg_controldata (PostgreSQL) 9.4.1
$ echo $PGDATA
/apps/database/postgresql-data
$ pg_controldata $PGDATA
WARNING: Calculated CRC checksum does not match value stored in file.
Either the file is corrupt, or it has a different layout than this program
is expecting.  The results below are untrustworthy.

Segmentation fault (core dumped)

Wow --- a core dump in pg_controldata is *really* unexpected, since it's
just printing some scalar fields. I can easily believe garbage out, but
a crash is harder. I'm beginning to think that there's something wrong
with your hand-rolled build, though I have no idea what.

Can you get a stack trace out of that? Should be enough to do

$ gdb path/to/pg_controldata
gdb> run /apps/database/postgresql-data
(wait for it to report segfault)
gdb> bt

Understood that it's way easier to do the mirroring when the directory paths agree. In my case, I can't line them up, due to restrictions.

That doesn't seem to be your problem, at least not yet.

                   regards, tom lane

Re: [GENERAL] Re: Re: [GENERAL] PostgreSQL mirroring from RPM installto Source install

From
John R Pierce
Date:
On 12/15/2016 2:16 PM, Richard Brosnahan wrote:
>
> gdb is not available on this machine. Neither which or locate could
> find it. The servers we're given are truly, shockingly, stripped down
> models.

what OS is this, what compiler toolchain did you use to build postgres
on them?



--
john r pierce, recycling bits in santa cruz