In addition to my last comment, if you are looking fior real embedded database
then Postgress does not fit your needs unless you would like to work with it as
Server mode.
With H2 (or Derby) you can work in Server mode or in embbedded mode and both
are much suitable for Java applications.
Robert Haas wrote:
The advice in Stephen's email is also very good - in particular,
whatever you come up with, you should submit performance results.
Note that while --enable-profiling is very useful and profiling
numbers are good to submit, you'll also want to make sure you do a
build that is
Konstantin Izmailov wrote:
Here you go:
from Mail Delivery Subsystem mailer-dae...@googlemail.com
mailto:mailer-dae...@googlemail.com
to pgf...@gmail.com mailto:pgf...@gmail.com
dateMon, Jun 15, 2009 at 9:16 PM
subject Delivery Status Notification (Failure)
hide details 9:16
(back from vacation)
Tom Lane wrote:
I wrote:
Another interesting question is why successive vacuums aren't causing
the index reltuples counts to go to zero. Shouldn't a partial vacuum
result in *all* pages of the relation being marked as not needing to
be examined by the next vacuum?
I
Hi,
On 06/12/2009 07:15 AM, Robert Haas wrote:
If you don't like the syntax, please argue about that on the generic
explain options v2 thread. Let's try to use this thread to discuss
the output format, about which I spent a good deal of time agonizing.
I spent some time playing around with the
* Robert Haas (robertmh...@gmail.com) wrote:
As I look at this, another problem is that it seems to me that you're
assuming that VARDATA_ANY() will return an aligned pointer, which
isn't necessarily the case (see src/include/postgres.h).
I believe you need to look at it more carefully. I
http://archives.postgresql.org/pgsql-hackers/2008-12/msg00448.php
One of the major complaints about the current synch rep patch is that
signals are used for communication between backends and walsender.
On some platforms, a signal doesn't interrupt sleep (i.e. poll or select
system call), which
On Tue, Jun 16, 2009 at 6:30 AM, Stephen Frostsfr...@snowman.net wrote:
* Robert Haas (robertmh...@gmail.com) wrote:
As I look at this, another problem is that it seems to me that you're
assuming that VARDATA_ANY() will return an aligned pointer, which
isn't necessarily the case (see
On Tue, Jun 16, 2009 at 12:19 PM, Andres Freundand...@anarazel.de wrote:
Startup-Cost1710.98/Startup-Cost
Total-Cost1710.98/Total-Cost
Plan-Rows72398/Plan-Rows
Plan-Width4/Plan-Width
Actual-Startup-Time136.595/Actual-Startup-Time
Actual-Total-Time136.595/Actual-Total-Time
On Tue, Jun 16, 2009 at 1:03 PM, Robert Haasrobertmh...@gmail.com wrote:
I see that... but I don't think the test in the first loop is correct.
It's based on the value of i % 4, but I'm not convinced that you know
anything about the alignment at the point where i == 0.
That's correct. To
* Robert Haas (robertmh...@gmail.com) wrote:
I see that... but I don't think the test in the first loop is correct.
It's based on the value of i % 4, but I'm not convinced that you know
anything about the alignment at the point where i == 0.
Ah, you may be half right there (see below). It
On Tue, Jun 16, 2009 at 1:03 PM, Robert Haasrobertmh...@gmail.com wrote:
On the flip side, I am curious as to if the arguments to a stored
procedure are always aligned or not. Never had a case to care before,
but if palloc() is always going to return an aligned chunk of memory
(per
* Greg Stark (gsst...@mit.edu) wrote:
There are two points here that kind of cancel each other out :)
Thanks for the insight. :)
Stephen
signature.asc
Description: Digital signature
On Tue, Jun 16, 2009 at 1:41 PM, Stephen Frostsfr...@snowman.net wrote:
Ah, you may be half right there (see below). It does appear to be
assuming that char *s (or s[i == 0]) is aligned, which isn't a
guarentee (in fact, it might never be right..). If having it actually
aligned is an
On 06/16/2009 02:14 PM, Greg Stark wrote:
On Tue, Jun 16, 2009 at 12:19 PM, Andres Freundand...@anarazel.de wrote:
Startup-Cost1710.98/Startup-Cost
Total-Cost1710.98/Total-Cost
Plan-Rows72398/Plan-Rows
Plan-Width4/Plan-Width
Actual-Startup-Time136.595/Actual-Startup-Time
On Tue, Jun 16, 2009 at 8:38 AM, Greg Starkgsst...@mit.edu wrote:
On Tue, Jun 16, 2009 at 1:03 PM, Robert Haasrobertmh...@gmail.com wrote:
I see that... but I don't think the test in the first loop is correct.
It's based on the value of i % 4, but I'm not convinced that you know
anything
Robert Haas wrote:
Ooh, good point. I still don't like the 0x20 thing, but using uint32
instead of int or long is the main point, unless we support any
platforms where 0x20 != ' '.
All our server encodings are strictly ASCII supersets. So 0x20 is always
the space character.
cheers
On Tue, Jun 16, 2009 at 8:53 AM, Andres Freundand...@anarazel.de wrote:
On 06/16/2009 02:14 PM, Greg Stark wrote:
On Tue, Jun 16, 2009 at 12:19 PM, Andres Freundand...@anarazel.de
wrote:
Startup-Cost1710.98/Startup-Cost
Total-Cost1710.98/Total-Cost
Plan-Rows72398/Plan-Rows
Hi all,
That's correct. To check the alignment you would have to look at the
actual pointer. I would suggest using the existing macros to handle
alignment. Hm, though the only one I see offhand which is relevant is
the moderately silly PointerIsAligned(). Still it would make the code
clearer
On 06/16/2009 03:22 PM, Robert Haas wrote:
Well, one problem with this is that the actual values are not costs,
but times, and the estimated values are not times, but costs. The
planner estimates the cost of operations on an arbitrary scale where
the cost of a sequential page fetch is 1.0.
Robert Haas wrote:
3. We have existing precedent for this design pattern in, e.g. table_to_xml
http://www.postgresql.org/docs/current/interactive/functions-xml.html
Tables are flat, explain output is not.
If there is a relationship between the items then that needs to be
expressed in
Greg Stark gsst...@mit.edu writes:
On some architectures like intel accessing unaligned ints is just
slow. On others (Alpha and PPC iirc?) it is an immediate bus error.
To a first approximation, Intel is the *only* popular architecture that
doesn't bus-error on unaligned accesses. (And I'm
On 06/16/2009 03:45 PM, Andrew Dunstan wrote:
3. We have existing precedent for this design pattern in, e.g.
table_to_xml
http://www.postgresql.org/docs/current/interactive/functions-xml.html
Tables are flat, explain output is not.
Comparing Greg's approach with Robert's it seems to me that
On Tue, Jun 16, 2009 at 9:45 AM, Andrew Dunstanand...@dunslane.net wrote:
Robert Haas wrote:
3. We have existing precedent for this design pattern in, e.g.
table_to_xml
http://www.postgresql.org/docs/current/interactive/functions-xml.html
Tables are flat, explain output is not.
If there
On Tue, Jun 16, 2009 at 10:30 AM, Andres Freundand...@anarazel.de wrote:
How would you model something like:
plans
plan ... /plan
plan ... /plan
...
/plans
otherwise?
There are potentially unlimited number of child nodes - AppendNode for
example can have any number of them. Sure, you
On Tue, Jun 16, 2009 at 12:50 PM, Fujii Masaomasao.fu...@gmail.com wrote:
On some platforms, a signal doesn't interrupt sleep (i.e. poll or select
system call)
say what?
--
Gregory Stark
http://mit.edu/~gsstark/resume.pdf
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
Hi Tom,
Speaking of which, what about some performance numbers? Like Heikki,
I'm quite suspicious of whether there is any real-world gain to be
had from this approach.
Will send numbers tomorrow, with the reworked patch.
Cheers,
Jeremy
--
Sent via pgsql-hackers mailing list
Robert Haas wrote:
If there is a relationship between the items then that needs to be expressed
in the XML structure, either by use of child nodes or attributes. Relying on
the sequence of nodes, if that's what you're doing, is not a good idea, and
I'm not doing that. Period, full
Hi,
On 06/16/2009 04:32 PM, Robert Haas wrote:
On Tue, Jun 16, 2009 at 10:30 AM, Andres Freundand...@anarazel.de wrote:
How would you model something like:
plans
plan .../plan
plan .../plan
...
/plans
otherwise?
There are potentially unlimited number of child nodes - AppendNode for
On Tue, Jun 16, 2009 at 10:59 AM, Andrew Dunstanand...@dunslane.net wrote:
Robert Haas wrote:
If there is a relationship between the items then that needs to be
expressed
in the XML structure, either by use of child nodes or attributes. Relying
on
the sequence of nodes, if that's what
Greg Stark st...@enterprisedb.com writes:
On Tue, Jun 16, 2009 at 12:50 PM, Fujii Masaomasao.fu...@gmail.com wrote:
On some platforms, a signal doesn't interrupt sleep (i.e. poll or select
system call)
say what?
Yup, what he said.
regards, tom lane
--
Sent via
Andres Freund and...@anarazel.de writes:
On 06/16/2009 04:32 PM, Robert Haas wrote:
Note that even in this case we DON'T rely on the ordering of the
nodes. The innerplan nodes have child nodes which contain their
relationship to the parent.
Not in the case of Append nodes, but I fail to
Hi,
I've found the uninstallation error...
# make uninstall
:
n/man7/truncate.7 /usr/local/pgsql/share/man/man7/unlisten.7
/usr/local/pgsql/share/man/man7/update.7
/usr/local/pgsql/share/man/man7/vacuum.7
/usr/local/pgsql/share/man/man7/values.7
rm: cannot remove
Tom Lane wrote:
Andres Freund and...@anarazel.de writes:
On 06/16/2009 04:32 PM, Robert Haas wrote:
Note that even in this case we DON'T rely on the ordering of the
nodes. The innerplan nodes have child nodes which contain their
relationship to the parent.
Not in the
Andres Freund wrote:
Anyway, I think what this discussion points out is that we actually need
a formal XML Schema for this output.
Agreed.
If helpful I can create a schema for the current format.
That will give us a useful starting point.
cheers
andrew
--
Sent via pgsql-hackers
On Tue, Jun 16, 2009 at 1:53 PM, Andres Freundand...@anarazel.de wrote:
While that also looks sensible the more structured variant makes it easier
to integrate additional stats which may not easily be pressed in the
'attribute' format. As a fastly contrived example you could have io
statistics
Jeremy Kerr wrote:
Hi Tom,
Speaking of which, what about some performance numbers? Like Heikki,
I'm quite suspicious of whether there is any real-world gain to be
had from this approach.
Will send numbers tomorrow, with the reworked patch.
I can easily redo my testing as well if required.
Hi all,
I am thinking about implementing GRANT ON ALL TABLES IN schema TODO
item. I saw many people sending proposals to the list but nobody seemed
to actually do anything. I have few questions and problems to iron out
before I can start the implementation. I would also like to note that I
hi,
I am working together with Harald on this issue. Below some thoughts on
why we think it should be possible to disable the postmaster-internal
recovery attempt and instead have faults in the processes started
by postmaster escalated to postmaster-exit.
[Our typical embedded situation]
Greg Stark gsst...@mit.edu writes:
I'm picturing adding a new tag, such as iostats, or actually I was
thinking of dtrace. If we have separate tags for all the estimates
and actual timings then any tags which come with the iostat or
dtrace option would just get mixed up with the estimates and
Tom Lane wrote:
But I'd be just as happy with a naming convention, like
planner:rowcount versus actual:rowcount, etc. I don't know
enough about XML usage to understand the benefits and costs of
different ways of providing that kind of structure.
FYI, you probably don't want this. the ':'
Czichy, Thoralf (NSN - FI/Helsinki) thoralf.czi...@nsn.com writes:
I am working together with Harald on this issue. Below some thoughts on
why we think it should be possible to disable the postmaster-internal
recovery attempt and instead have faults in the processes started
by postmaster
Hi!
I have been doing some bulk loading testing recently - mostly with a
focus on answering why we are only getting a (max of) cores/2(up to
around 8 cores even less with more) speedup using parallel restore.
What I found is that on some fast IO-subsystem we are CPU bottlenecked
on concurrent
On Tue, Jun 16, 2009 at 12:04 PM, Tom Lanet...@sss.pgh.pa.us wrote:
Greg Stark gsst...@mit.edu writes:
I'm picturing adding a new tag, such as iostats, or actually I was
thinking of dtrace. If we have separate tags for all the estimates
and actual timings then any tags which come with the
Robert Haas robertmh...@gmail.com writes:
On Tue, Jun 16, 2009 at 12:04 PM, Tom Lanet...@sss.pgh.pa.us wrote:
FWIW, I like Greg's idea of subdividing the available data this way.
I like it too, but I'd like to see us come up with a design that
allows it to be used for all of the output
On Tue, Jun 16, 2009 at 1:21 PM, Tom Lanet...@sss.pgh.pa.us wrote:
Robert Haas robertmh...@gmail.com writes:
On Tue, Jun 16, 2009 at 12:04 PM, Tom Lanet...@sss.pgh.pa.us wrote:
FWIW, I like Greg's idea of subdividing the available data this way.
I like it too, but I'd like to see us come up
-Original Message-
From: pgsql-hackers-ow...@postgresql.org [mailto:pgsql-hackers-
ow...@postgresql.org] On Behalf Of Stephen Frost
Sent: Tuesday, June 16, 2009 5:47 AM
To: Greg Stark
Cc: Robert Haas; Jeremy Kerr; pgsql-hackers@postgresql.org; Alvaro
Herrera; Stefan Kaltenbrunner;
Robert Haas robertmh...@gmail.com writes:
On Tue, Jun 16, 2009 at 1:21 PM, Tom Lanet...@sss.pgh.pa.us wrote:
As a concrete example of what I'm thinking about, I'd hope that PgAdmin
would be able to display a graphical summary of a plan tree, and then
pop up measurements associated with one of
Petr Jelinek wrote:
Anyway back to my thoughts about this patch. First of all I see problem
with the proposed syntax. For this syntax I think TABLES (FUNCTIONS,
SEQUENCES, etc) would have to be added to keywords which is problematic
because there are views named tables, sequences, views in
On Tue, Jun 16, 2009 at 2:12 PM, Tom Lanet...@sss.pgh.pa.us wrote:
The main point here is that we have a pretty good idea of what
general-purpose client code is likely to want to do with the data, and
in a lot of cases that does not translate to having to know each node
type explicitly, so
On 06/16/2009 09:51 PM, Robert Haas wrote:
On Tue, Jun 16, 2009 at 2:12 PM, Tom Lanet...@sss.pgh.pa.us wrote:
The main point here is that we have a pretty good idea of what
general-purpose client code is likely to want to do with the data,
and in a lot of cases that does not translate to
On Tue, Jun 16, 2009 at 12:47 PM, Stefan
Kaltenbrunnerste...@kaltenbrunner.cc wrote:
Hi!
I have been doing some bulk loading testing recently - mostly with a focus
on answering why we are only getting a (max of) cores/2(up to around 8
cores even less with more) speedup using parallel restore.
Merlin Moncure wrote:
On Tue, Jun 16, 2009 at 12:47 PM, Stefan
Kaltenbrunnerste...@kaltenbrunner.cc wrote:
Hi!
I have been doing some bulk loading testing recently - mostly with a focus
on answering why we are only getting a (max of) cores/2(up to around 8
cores even less with more)
Andrew Dunstan and...@dunslane.net wrote:
If a table is created or truncated in the same transaction that does
the load, and archiving is not on, the COPY is not WALed.
Slightly off topic, but possibly relevant to the overall process:
those are the same conditions under which I would love to
Merlin Moncure wrote:
On Tue, Jun 16, 2009 at 12:47 PM, Stefan
Kaltenbrunnerste...@kaltenbrunner.cc wrote:
Hi!
I have been doing some bulk loading testing recently - mostly with a focus
on answering why we are only getting a (max of) cores/2(up to around 8
cores even less with more) speedup
55 matches
Mail list logo
