On Tue, 3 Feb 2015 06:39:02 -0700 (MST)
Jan Slodicka j...@resco.net wrote:
Eduardo Morras-2 wrote
A ~8000MB db with app example data. More than 1000 query-corp
created as part of test driven development of the app. We have
precalculated the correct results in tables and its number of rows
On Tue, 3 Feb 2015 02:43:00 -0700 (MST)
Jan Slodicka j...@resco.net wrote:
Eduardo Morras-2 wrote
I use a big test db to assure new versions of sqlite works
properly. With 3.7.15.2 it takes 43 minutes, with 3.8.8.2 on same
hardware 27 minutes, it's 16/0.43 = 37% less or 27/0.43 = 63
properly. With
3.7.15.2 it takes 43 minutes, with 3.8.8.2 on same hardware 27 minutes, it's
16/0.43 = 37% less or 27/0.43 = 63% improve.
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Regards,
Navin
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for gzip and -3 for xz is enough.
-j
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has attachment set to off, so they're deleted before remailed.
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the I/O.
Simon.
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expect the
unnecessary sort to be pure overhead.
If you insert in correct index order, the index update phase is faster because
it don't need rebalance the b-tree so often after each insert.
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threads to update the same row
multiple times, so only the last one was applied or apply them in one
transaction, which is faster than apply them one by one.
~Joe
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On Sat, 22 Nov 2014 11:01:45 -0500 (EST)
Joseph Fernandes josfe...@redhat.com wrote:
Thanks Eduardo.
Answers inline JOE
a)If you use Sqlite in single thread, compile it without thread
support.
JOE We are running it in multithread mode, as the database will be
JOE fed by multiple File
)Disable autovacuum
2) Will ther be any write performance hit when the number of records
in the DB increase?
Thanks in advance
~Joe
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, is in Sqlite repository, check
http://www.sqlite.org/src/artifact/a2615049954cbb9cfb4a62e18e2f0616e4dc38fe
a.k.a. src/test_server.c
But, as others aim and hit, you should use a real C/S RDBMS, my preference,
PostgreSQL server.
HTH
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On Wed, 27 Aug 2014 23:04:40 +0200
Petite Abeille petite.abei...@gmail.com wrote:
On Aug 27, 2014, at 10:57 PM, Eduardo Morras emorr...@yahoo.es
wrote:
Sorry, don't understand why others will throw an exception in the
group by, perhaps I'm misunderstanding the group
,
handling of analytic functions…. :)
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or whatever you want and update user_version.
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/636024302cde41b2bf0c542f81c40c624cfb7012 for
parent-child relationship example, it's for in-table relation but the in-code
documentation is awesome, you can steal some ideas from it.
Thanks.
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or with
the full sqlite3 src? Most of -DSQLITE_OMIT* won't work if you use the
amalgamation.
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to open database only when it is needed, to avoid
risk of file corruption on power loss. Is there any known issue with
multiple open/close operations?
1020 simultaneus connections? Perhaps iOS exhausted del max. file descriptor
per process.
Regards,
Greg
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a call to sqlite3_openv2? Or cycle of
sqlite3_prepare_v2/step/finalize?
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primary key on indexs by default. Run analyze/reindex after change.
Thanks,
-jens
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, platform, and hardware, I would imagine the
SSD I am running on would not be such a tight bottleneck. Thus, I am
trying to see if there is anything I can do to improve on this.
Perhaps he has 2 disks, first for read FASTQ, second for write sqlite db.
Kevin
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use
case.
HTH
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. In your first example, id is
added twice to the index.
Thanks in advance,
Pavel.
L
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. amalgamation under FreeBSD 9.2 x86_64.
using clang 3.4 compiler.
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. This option is incompatible
with the ``X'' option.
The fix is to allocate 4*N+1 bytes instead of 4*N bytes. Dan is
checking in the fix even as I type this reply.
--
D. Richard Hipp
d...@sqlite.org
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extensions.
HTH
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that
renames SQLite internals can be injected
SELECT register_simple_function('MAX', 1, 'DROP TABLE ?');
No?
Regards,
Clemens
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. It's a macro expansion in one function extension that
collides and redefines a #define in sqlite3.h
Thanks to all.
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know why I get an Out of memory preparing the query. Vars are
initialized, db points to an open sqlite3 db, and stmt is the first time used
int the code. I use a similar code on other projects abd works with no
problems.
Any clue?
Thanks
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On Tue, 4 Mar 2014 15:19:24 +
Simon Slavin slav...@bigfraud.org wrote:
On 4 Mar 2014, at 3:15pm, Simon Slavin slav...@bigfraud.org wrote:
On 4 Mar 2014, at 3:09pm, Eduardo Morras emorr...@yahoo.es wrote:
zSql= SELECT r.name, s.content FROM resource AS r, static AS s
WHERE (r.ids
.
It's how RAID5 works. Check this page docs http://baarf.com/ about it.
Simon.
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and
no matter which compiler you use because is not an implementation problem.
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requests
to it via nanomsg.
Best regards/Mit freundlichen Grüßen
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El lun, 10/2/14, Simon Slavin slav...@bigfraud.org escribió:
Asunto: Re: [sqlite] Free Page Data usage
Para: General Discussion of SQLite Database sqlite-users@sqlite.org
Fecha: lunes, 10 de febrero, 2014 12:34
On 10 Feb 2014, at 11:29am,
Understood. Thanks
Sorry if I'm late.
There's no difference between developing a formal application and a Web
application from the Sqlite point of view.
You can check mongoose webserver. It uses LUA for scripting web pages
(similar to PHP but with LUA) and Sqlite for db access from LUA.
/db, but
it can fit your needs.
--
Will
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) and data. But if you need it, PostgreSQL don't need
those tricks.
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or calculate secundary data nor call now() on
sql. We have not tried to run it on more servers or with bigger write load.
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is nanomsg architect/project developer/man behind the throne.
http://zeromq.org/0mq
http://nanomsg.org/ nanomsg
http://250bpm.com/Martin Sústrik Home Page
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environment (embedded device that
reads data from external analogic devices) we setted it to 1.
~Mike Foss
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On Mon, 2 Sep 2013 13:48:02 +0100
Simon Slavin slav...@bigfraud.org wrote:
On 2 Sep 2013, at 8:25am, Eduardo Morras emorr...@yahoo.es wrote:
Or create the index with collate
CREATE INDEX idx_collated_column ON myTable ( column COLLATE NOCASE )
The problem with doing it in the index
NOCASE )
Simon.
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. Here's a pointer to it
http://www.sqlite.org/capi3ref.html#sqlite3_update_hook , remember to free/fry
it after use ;)
HTH
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On Wed, 17 Jul 2013 12:04:52 +0200
Paolo Bolzoni paolo.bolzoni.br...@gmail.com wrote:
On Tue, Jul 16, 2013 at 8:13 PM, Eduardo emorr...@yahoo.es wrote:
Can you show us the query and/or schemas? If not:
Sure, I appended everything in the bottom of this email.
Unfortunately gmail will mess
on the
production server, maybe I should not worry at all?
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?
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me know if you have any other questions!
-elan
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??
Use csv.
Thank you
Reddy Balaji C.
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On Thu, 6 Jun 2013 08:15:57 -0400
Richard Hipp d...@sqlite.org wrote:
On Thu, Jun 6, 2013 at 8:05 AM, Eduardo Morras emorr...@yahoo.es wrote:
Hi,
Is there an official list of assigned application id sqlite header? If
exist, How can I register my application-id?
The official list
for NULL values of a, which are not counted.
count(*) does not.
If I understand well , select count(a) from t = (select count(*) from t) -
(select count(*) from t where t.a = NULL) and both selects will use cover
indexs, doesn't it?
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On Fri, 07 Jun 2013 13:12:14 +0200
Clemens Ladisch clem...@ladisch.de wrote:
Eduardo Morras wrote:
where t.a = NULL
where t.a IS NULL
(NULL compares as not equal to any value, including itself.)
OPppss you're right. Thought too fast and wrote even faster :(
Regards,
Clemens
Hi,
Is there an official list of assigned application id sqlite header? If exist,
How can I register my application-id?
Thanks
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so much for your help.
peterK
HTH
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,
including locks, can easily be done with sqlite.
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are getting the lock twice, one with the pragma, that lock whole db, second
wih the begin exclusive.
If the database is in wal mode, it needs a read or a write access to get lock.
Surely your db isn't in wal mode. You can check it calling the correct pragma.
Jonathan
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or xz -2 will minimize bytes to write. If you are
working with 5D images xz (7-zip LZMA fork) will do the best.
For processing you do zcat file | processing_application or xzcat file |
processing_application
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pragma temp_store=2, does it work better?
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to be incorporating source, not binaries.
Thanks,
Marc
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of mark as delete/dirty those rows is greater
than deleting them.
Thanks,
Jason
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-users
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On Mon, 07 Jan 2013 05:43:50 -0800
Roger Binns rog...@rogerbinns.com wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 07/01/13 00:22, Eduardo Morras wrote:
opened before the fork, and after it the childs use the database
connection. I don't want to corrupt the database,
https
On Mon, 7 Jan 2013 12:27:54 +
Simon Slavin slav...@bigfraud.org wrote:
On 7 Jan 2013, at 8:22am, Eduardo Morras emorr...@yahoo.es wrote:
The app works but, is anyone working with sqlite this way? Any advice to
avoid db corrupts, deadlocks, whatever?
Read this page:
http
On Mon, 7 Jan 2013 11:11:01 +0100
Pavlos Christoforou pav...@p9ft.com wrote:
Hello Eduardo,
We do (succesfully) use sqlite in a similar manner as you describe in your
post but the code ensures the DB is opened in each individual child process
*after* a child is successfully forked
On Mon, 07 Jan 2013 20:09:02 +0700
Dan Kennedy danielk1...@gmail.com wrote:
On 01/07/2013 03:22 PM, Eduardo Morras wrote:
Hi, I use sqlite in some of my projects. In one it follows a
parent/multichild model (multifork). The database is managed by the
parent, open close backups etc
changing to
multithread model, i don't want to use them for this project.
Thanks
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At 03:27 25/07/2012, you wrote:
And here I am again, asking for what you find so easy and I. well, just
cannot understand.
...
but this does not store anything in the database table. I have used an
sqlite browser to determine if, in fact, some data was stored, but no,
nothing has been
At 06:48 05/06/2012, you wrote:
Have a market data extractor running tick tapes and saving data to sqlite db.
All coded in C++ and previously ran fine and fast on bare metal.
Processes tick tapes from NAS and saved to local sqlite db's on c drive.
We moved program onto VMWare VM's... same nas
At 07:08 06/06/2012, you wrote:
Hi,
I have few queries regarding the SQLite. I have listed them below please go
through them and give your answers. Thanks
Say if I am working on a DB with 3 tables with 100 records each and each
records with some 5 fields of data.Each field is varchar(20)
1.
At 12:09 11/04/2012, you wrote:
Hi, all
I have applied a memory leak detection tool
Meltonhttp://lcs.ios.ac.cn/~xuzb/melton.html to
find memory leaks in sqlite-3.7.11.
Two bugs were found, and I check them manually as the real ones.
Here is the url of the bugs:
At 14:06 11/04/2012, you wrote:
On Wed, Apr 11, 2012 at 02:01:29PM +0200, Eduardo Morras wrote:
At 12:09 11/04/2012, you wrote:
Hi, all
I have applied a memory leak detection tool
Meltonhttp://lcs.ios.ac.cn/~xuzb/melton.html to
find memory leaks in sqlite-3.7.11.
Two bugs were found, and I
At 11:32 28/03/2012, you wrote:
Hello,
I'm doing some test with SQlite 3.7.11 in Windows Embedded industrial PC.
I need to store data in a table very quickly. Let's say new data each 10 msec.
I tryed with DB on disk but obviously was not possible to reach the correct
performance.
So I tryed
At 07:53 21/03/2012, Max Vlasov wrote:
On Wed, Mar 21, 2012 at 1:33 AM, Tim Morton t...@preservedwords.com wrote:
So it seems the index is no help;
Are you sure you did as Simon explained?
Becausem my tests shows the trick works... (sqlite 3.7.10)
The trick works, but i think he didn't
At 04:58 08/03/2012, you wrote:
Hi guys,
Decided to open a discussion on SQLite amalgamation. Please forgive
us, Windows users, who unlucky enough to use Microsoft Visual
Studio. As many of you know, it is year 2012 now, and Visual Studio
is up to version 10, but the guys at Microsoft still
At 12:22 07/03/2012, you wrote:
Dear list,
I'm using the backup api to frequently backup
a running sqlite database.
I'm wondering if the backup API is able to detect a corrupt
database or will it simply also backup a corrupt DB ?
I evaluating the need to issue a (timeconsuming) pragma
At 04:21 08/01/2012, you wrote:
[I sent this 3 months ago, but got no response - if this is the wrong
place to be sending patches, please tell me where they should be sent.]
Attached are three small patches for lemon:
lemon-remove-duplicate-prototype.patch - remove a duplicate prototype
for
At 11:27 27/12/2011, you wrote:
Thank you. I agree. It's correct.
I already have data base with /country/state/city/village format. Is it
possible to do that while virtual table creation time?
if yes, how?
Change '/' to ','. This way you get a csv file which you can import
directly. Perhaps
At 15:10 27/12/2011, Mohit Sindhwani wrote:
On 27/12/2011 9:25 PM, Eduardo Morras wrote:
At 11:27 27/12/2011, you wrote:
Thank you. I agree. It's correct.
I already have data base with /country/state/city/village format. Is it
possible to do that while virtual table creation time?
if yes
At 14:04 18/10/2011, Igor Tandetnik wrote:
Frank Missel i...@missel.sg wrote:
I think that the sqlite-users e-mail list has enough traffic to warrant a
proper forum.
For what it's worth, I'm using GMane (http://gmane.org/), which is a
mailing list-to-NNTP gateway and happens to carry this
At 06:53 04/08/2011, you wrote:
I was hoping they wouldn't block each other because it's a read
lock. I tried making an index on all the columns, but R*tree table +
JOIN that I'm using runs about 10x faster. I might have done
something wrong, so I'm open to suggestions on a better index,
Oks, another let's try another thing/think.
Try the select without the COUNT(*):
SELECT class FROM data_r JOIN data USING (rowNum) WHERE 57 col0min
AND col0max 61 AND 52 col1min AND col1max 56 AND 66 col2min
AND col2max 70 AND 88 col3min AND col3max 92 AND 133 col4min
AND col4max
At 19:58 04/08/2011, Stephan Beal wrote:
Hi, all!
http://www.sqlite.org/whentouse.html
says:
Temporary triggers can be added to the database to record all changes into
a (temporary) undo/redo log table. These changes can then be played back
when the user presses the Undo and Redo buttons. Using
At 02:53 29/07/2011, Richard Hipp wrote:
On Thu, Jul 28, 2011 at 12:27 AM, res...@googlemail.com wrote:
I suspect that I will come up with other suggestions once I have a chance to
dig a little deeper into the benchmarks. If you have suggestions, please
publish them here.
They are comparing
At 14:19 29/07/2011, Black, Michael (IS) wrote:
What they don't say explicitly is that if all you need is key/value
capability then an SQL database is overkill and only slows you down
(bit of a duh factor there though not obvious to
neophytes). Generally speaking that's one thing they don't
At 12:58 03/06/2011, you wrote:
Guys, the server for this game -
http://www.frozensynapse.com
uses SQLite. We've had an unexpectedly successful launch which has
resulted in the server being swamped with players, and I'm trying to
optimise everywhere I can. I've always been under the
At 18:11 06/04/2011, you wrote:
Thanks Stephan and Simon - I kind of figured it was one of those how
long is a ball of string questions, but I just wanted to check there
weren't any particular gotchas to watch out for.
Regarding the separate files, it seems the best way to go. Each
individual
On Sat, 29 Jan 2011 15:07:47 -0800 (PST)
Rael Bauer rael_ba...@yahoo.com wrote:
It seemed strange that a simple select * from table that I was
doing was so slow. The table contained about 20 columns (fields) and
300 rows. The select took about 1.5 seconds. (using SQLite Expert).
So my
On Fri, 11 Jun 2010 00:49:47 -0700 (PDT)
durumdara durumd...@gmail.com wrote:
Hi!
I have an app that transform the input images to later somebody can
.
I increased the size of pages, but only a little changes I see.
May this caused by index? Because this is a primary key, I cannot
On Fri, 11 Jun 2010 12:38:55 +0200
Eduardo emor...@xroff.net wrote:
Opsss, hit send too early
You can also index the blobtable by dirty colum for faster searches,
don't know if
index helps on deletes if you use the f1) way.
You can use the dirty colum with integers if you need more than 2
2010-06-09 Tomash Brechko tomash.brec...@gmail.com:
With SQLite 3.6.23.1 I see the following:
$ ./sqlite3 /tmp/a.sqlite
SQLite version 3.6.23.1
Enter .help for instructions
Enter SQL statements terminated with a ;
sqlite CREATE TABLE t (c1 INTEGER, c2 INTEGER);
sqlite INSERT INTO t
On Sun, 11 Apr 2010 14:09:21 -0400
Nikolaus Rath nikol...@rath.org wrote:
Using rsync is unfortunately not possible, I'm stuck with HTTP and
FTP.
I tried a few PPM compressors, but even though the compression ratio
is amazing, I'm not desperate enough to invest *that* much CPU time
yet.
At 13:10 29/10/2008, you wrote:
Look up the implications of Sqlite's ACID feature and the use of
transactions. COMMITs are tied to disk rotation speed. On our Sqlite
databases where we look for performance we use 15,000 rpm disks and are
diligent in wrapping INSERTs, UPDATEs and DELETEs in
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