I've printed log out in the case of no disk, and the log shows that file
descriptor that I sent to fsync as an argument is 27, and the fsync
functions is called. But I don't know what will fsync do without a disk.
Appreciate for your quick response and great help.
On 01/19/2015 06:30 PM, Stephan
On my whish-list for this list is the possibility to include attachments like
screenshots and databases.
For program more handy functions and documentation more examples. I'm pretty
sure that less lazy users made functions that could be included as standard to
be used for all of us.
Kind
On 20 Jan 2015, at 12:23am, Klaas V klaasva...@yahoo.com wrote:
On my whish-list for this list is the possibility to include attachments like
screenshots and databases.
I've been active on several technical helplists over the years and from my
experience I'll tell you what would happen.
I've tested it in two kinds of Set-Up box. In one box, it costs about
5ms while in the other box, it costs 30ms. Disks have been removed on
both of them. It's strange why the difference is so big.
Appreciate for you response, thank you.
On 01/20/2015 04:46 AM, Richard Hipp wrote:
On 1/19/15,
Hi,
I am using System.Data.SQLite, Version=1.0.92.0. I read that increasing the
page_size to 4k on modern OS is a good thing and should speed things up.
However, I have a particular query that takes substantially longer. I tried
to make sure that nothing else is changed, so I am a little
On Mon, 19 Jan 2015, Richard Hipp wrote:
Thank you for reporting the problem.
Certainly!
We always fix every problem that we are aware of in SQLite. But this
problem had not been previously reported to us, and did not occur in any
of the 168 million test cases that we ran prior to
2015-01-19 11:01 GMT+01:00 Frank Ho frank...@263.net:
Hi,
I compiled the SQLite on the Cygwin 1.7.33 running on a Windows 8.1, here's
the error:
.libs/sqlite3.o: In function `sqlite3ThreadProc':
../sqlite-autoconf-3080800/sqlite3.c:22471: undefined reference to
`_endthreadex'
Thank you for your answer very much. But I have removed the disk from
my set-up box, the data will be saved in memory and the system doesn't
know there's no disk, it will still call fsync. What do you think in
this case?
Appreciate your quick response and great help.
On 01/19/2015 05:25 PM,
Hello,
I have a regression to report, that seems to have been introduced between
SQLite 3.8.6 and the newest 3.8.8 (at least our test case worked in 3.8.6 and
stopped working somewhere in 3.8.7.x; we were hoping it got fixed in 3.8.8 but
eventually it wasn’t).
In our application we can have
Hi,
I compiled the SQLite on the Cygwin 1.7.33 running on a Windows 8.1, here's the
error:
.libs/sqlite3.o: In function `sqlite3ThreadProc':
../sqlite-autoconf-3080800/sqlite3.c:22471: undefined reference to
`_endthreadex'
.libs/sqlite3.o: In function `sqlite3ThreadCreate':
On 1/19/15, Angelo Mottola a.mott...@converge.it wrote:
Hello,
I have a regression to report, that seems to have been introduced between
SQLite 3.8.6 and the newest 3.8.8 (at least our test case worked in 3.8.6
and stopped working somewhere in 3.8.7.x; we were hoping it got fixed in
3.8.8
Ignore my previous email on this subject. We are able to get
different results from 3.8.6 and 3.8.8. Unclear yet if the one or the
other is incorrect.
On 1/19/15, Richard Hipp d...@sqlite.org wrote:
On 1/19/15, Angelo Mottola a.mott...@converge.it wrote:
Hello,
I have a regression to
Might this not be a reverse_unordered_selects pragma or compile option going wrong, or at least the code making it work getting
somehow hooked in the new versions for this query?
I have seen similar things when using that pragma (but of course that was
intended).
Just a thought...
On
On 19 Jan 2015, at 3:10pm, Richard Hipp d...@sqlite.org wrote:
It is a very
complex problem. In particular, the sample query works fine as long
as the number of columns in the result set is not exactly 60. Adding
or removing a single column of result gives the correct answer.
I would love
On 1/19/15, RSmith rsm...@rsweb.co.za wrote:
Might this not be a reverse_unordered_selects pragma or compile option
going wrong, or at least the code making it work getting
somehow hooked in the new versions for this query?
It looks like a bug. If you update to the latest trunk check-in and
Hi,
I added a call to both:
ANALYZE
ANALYZE sqlite_master
To my app at timely intervals. We are also running in WAL mode. Do I need to
do a WAL checkpoint (pragma wal_checkpoint) before running the index recalc
or not?
Thanks
Andy
___
On 1/19/15, Simon Slavin slav...@bigfraud.org wrote:
On 19 Jan 2015, at 3:10pm, Richard Hipp d...@sqlite.org wrote:
It is a very
complex problem. In particular, the sample query works fine as long
as the number of columns in the result set is not exactly 60. Adding
or removing a single
On 2015/01/19 12:52, Stephan Buchert wrote:
(Prompt erased for easier paste and copy):
CREATE TABLE satpos(msec INTEGER, latitude REAL, longitude REAL);
INSERT INTO satpos VALUES (86386217,-0.0318895369716216,-167.689719869132);
INSERT INTO satpos VALUES
On Mon, Jan 19, 2015 at 11:23 AM, Wei, Catherine catherine@arris.com
wrote:
Thank you for your answer very much. But I have removed the disk from
my set-up box, the data will be saved in memory and the system doesn't
know there's no disk, it will still call fsync. What do you think in
Dan Kennedy-4 wrote
Is it correct that you have a single transaction inserting lots of data
into a table with multiple indexes on it? Something like 1GB?
Depends on. It is the best option from the application point of view. Other
solutions introduce additional risks. Apparently, the answer is
On Mon, Jan 19, 2015 at 3:49 AM, Wei, Catherine catherine@arris.com
wrote:
Hi, I'm running a software in a set-up box with linux system and find
that every time when I commit transaction, sqlite takes too much time
when it executes fsync or fdatasync function. What could be the possible
From what little you reveal I assume this is some kind of datalogging
application. I also assume there will be a primary key (call ?) and also
suspect that there are a number of secondary indices for data retrieval. Since
you make no mention of transactions, I must infer that you are using
On 19 Jan 2015, at 5:38am, Wei, Catherine catherine@arris.com wrote:
The time i'm looking at is the duration that function fsync or fdatasync
executes, it's about 30ms. I don't know wether it's related to linux
kernel or something related. I've tested it in another kind of set-up
box and
(Prompt erased for easier paste and copy):
CREATE TABLE satpos(msec INTEGER, latitude REAL, longitude REAL);
INSERT INTO satpos VALUES (86386217,-0.0318895369716216,-167.689719869132);
INSERT INTO satpos VALUES
(86386716,-2.93238037697483e-06,-167.690497310632);
INSERT INTO satpos VALUES
I'll add the results from the latest test that was running for the last 2
hours:
This time I did not use intermediate commits. Instead, I dropped the table
indexes before the bulk insert started and re-created them at the end.
The results after a few tables (most of them small, a few contained
Works as specified.
The .width command sets the output width of a column to a certain number of
characters;
output that is shorter is padded on the right (or the left, if the width is
negative);
output that is too long is truncated.
Use the printf() function to define the format of real
Hi,
I determined that I would like to upgrade my page_size from 1k to 4k during
start up time if it is not done yet. At the time I would like to do that, no
other db access is occurring yet. Still, I see failures that often the
page_size returned at the end in the verification step is still
I have a single threaded application, which at its heart is
while (true) {
open a database // any one of thousands, so I can’t just keep it open
do a select
close the database
}
With that part unchanged, does anyone have any optimization suggestions? I am
compiling the
On 19 Jan 2015, at 6:04pm, Andy (KU7T) k...@ku7t.org wrote:
Any ideas what I am doing wrong. Do you have to exclusively lock or wait
somewhere?
You have to run VACUUM immediately after setting the new page_size. See
http://www.sqlite.org/pragma.html#pragma_page_size
One normally only sets
On 19 Jan 2015, at 4:11pm, Andy (KU7T) k...@ku7t.org wrote:
ANALYZE
ANALYZE sqlite_master
To my app at timely intervals. We are also running in WAL mode. Do I need to
do a WAL checkpoint (pragma wal_checkpoint) before running the index recalc
or not?
You don't even need the
On 1/19/15, Angelo Mottola a.mott...@converge.it wrote:
Hello,
I have a regression to report, that seems to have been introduced between
SQLite 3.8.6 and the newest 3.8.8 (at least our test case worked in 3.8.6
and stopped working somewhere in 3.8.7.x; we were hoping it got fixed in
3.8.8
On 1/19/15, Roger Binns rog...@rogerbinns.com wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 01/18/2015 06:49 PM, Wei, Catherine wrote:
takes too much time when it executes fsync or fdatasync function.
Note that although the documentation says only the file handle is
synced, in
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 01/18/2015 06:49 PM, Wei, Catherine wrote:
takes too much time when it executes fsync or fdatasync function.
Note that although the documentation says only the file handle is
synced, in practise many filesystems actually sync the whole
filesystem
Aha, thanks. PRINTF is the function to use here (or ROUND). I had been too
optimistic to think the -0. would be the truncated output.
___
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