Try putting Delivery.ID=1987654321 at the front of your query. I suspect
that's a pretty small set.
And I also assume you have a Delivery index for ID. Would help if you would
show your indexes. Also, show the explain with and without the added column.
That should show what it's doing
Can you force a WAL checkpoint periodically? Also...of course test 3.7.0.1
PRAGMA database.wal_checkpoint;
I assume you're doing your thing in one transaction. I would've thought WAL
would notice that and do it's auto-checkpoint anyways. Can one of the experts
comment on the expected
What happens if you do this with 3.6.23.1 or 3.7.0.1 ?
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Northrop Grumman Information Systems
From: sqlite-users-boun...@sqlite.org on behalf of Scott Crosby
Sent: Wed 8/4/2010 8:14 AM
To:
I just ran your code on 3.6.23.1 and it works just fine.
Can you try a newer version?
x.sql:
create table mytable (id VARCHAR(255), name VARCHAR(255), address VARCHAR(255),
PRIMARY KEY(id));
insert into mytable (id, name, address) VALUES ('123abc','charlie', '123 st');
insert into mytable
I love email lists like this when people ask questions that make me want to
test stuff and confirm my hypotheses. Gives me some much needed practice...
Dropping your index and recreating every time you add rows is NOT the best
thing to do. Quite obviously your time to create an index is
You could've tested this in the time it took for you to get answer:
File x.sql
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE t (i integer);
INSERT INTO "t" VALUES(1);
CREATE TABLE c(i integer);
CREATE TRIGGER t1 before insert on t begin insert into c values((select
count(*) from
Would it be possible to have SQLite tell you "not enabled" for any functions
that are not compiled in?
Rather than "no such function"?
So for those of us who are not familiar with all the possibilities might
accidentally stumble upon them?
Or...for when you start disabling functions to
I couldn't get your trigger to work properly on deleting an empty album...it
still said "cannot be deleted".
I ended up modifying it some..dont' know if this is your cause or not but might
be worth a try to modify your trigger.
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE albums
I can think of several answers to your last question;
#1 Your mileage may vary
#2 Take the easiest way for you and see it works well.
#3 Since SQL wasn't designed for vector math do it in your program -- probably
MUCH clearer to anybody (including yourself) in the future. It shouldn't take
tes of DB size and I am
not sure they are waiting one hour after restarting their PCs.
There must be a way to solve this problem. As I said before Linux is
just fine. I wish to see Linux on every PC one day.
*Samet YASLAN*
On 22.07.2010 22:51, Kees Nuyt wrote:
> On Thu, 22 Jul 2010 10:44:50 -0500,
Wrongread the docs...if copy didn't do binary by default there would so
many screwed up computers in the world
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/copy.mspx?mfr=true
Using /b
/b directs the command interpreter to read the number of bytes
Also...try doing a "copy my.db nul:" to get it cached once before you use it.
You're probably running into disk head seeking the first time (due to random
placement of your data relative to your query) which will slow you down a lot.
Michael D. Black
Senior Scientist
Advanced Analytics
lite] EXTERNAL:Re: VFS Layer for to split database into
> several files?
>
> On Mon, Jul 19, 2010 at 01:48:56PM -0500, Black, Michael (IS) scratched
> on the wall:
> > NFSV2 is something that limits filesize.
>
> From the phrasing of the rest of your email, I assume y
Discussion of SQLite Database
Subject: Re: [sqlite] EXTERNAL:Re: VFS Layer for to split databaseinto several
files?
On Mon, Jul 19, 2010 at 01:48:56PM -0500, Black, Michael (IS) scratched on the
wall:
> NFSV2 is something that limits filesize.
From the phrasing of the rest of your email, I ass
nks,
- James
> -Original Message-
> From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-
> boun...@sqlite.org] On Behalf Of Black, Michael (IS)
> Sent: Monday, July 19, 2010 10:51 AM
> To: General Discussion of SQLite Database
> Subject: Re: [sqlite] VFS Layer for
Also...would you care to elucidate what environment you're in that limits you
to 2GB?
I've heard numerous people before who think they're limited when, in actuality,
they're not.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Northrop Grumman Information Systems
org> wrote:
>
>
> On Wed, Jul 14, 2010 at 1:34 PM, Black, Michael (IS) <
> michael.bla...@ngc.com> wrote:
>
>> Was that a facetious remark???
>>
>> Rather than "here's a function/pragma that allows you to put the journal
>> file where you want
On Wed, Jul 14, 2010 at 1:34 PM, Black, Michael (IS) <michael.bla...@ngc.com
> wrote:
> Was that a facetious remark???
>
> Rather than "here's a function/pragma that allows you to put the journal
> file where you want -- but BE CAREFUL BECAUSE..."
>
> Writing you
Hipp
Sent: Wed 7/14/2010 12:12 PM
To: General Discussion of SQLite Database
Subject: EXTERNAL:Re: [sqlite] Sqlite Insert Speed Optimization
On Wed, Jul 14, 2010 at 12:31 PM, Black, Michael (IS) <
michael.bla...@ngc.com> wrote:
> If you could set the journcal location BEFORE you open
Yuck...do you know what bandwidth you have? Looks kind of like a T1 line to me.
That should allow 100Meg to come across in about 13 minutes if it's not being
used for anything else. Unless you're monitoring time usage in your
application how do you know where your time is being spent? If
Add "collate nocase" to your queries.
sqlite> select * from A inner join B on A.a=B.a collate nocase;
a b c a d e
-- -- -- -- -- --
a 4 7 A 4 7
Sent: Wed 7/14/2010 11:24 AM
To: General Discussion of SQLite Database
Subject: EXTERNAL:Re: [sqlite] Sqlite Insert Speed Optimization
Black, Michael (IS) wrote:
> Does anybody know how to make the journal file go to a different
> location than the database? Apprarently it's not treated
If you don't know why it's slow you'll be shooting in the dark. And doing
compression on a local network link isn't likely to buy you much. Might even
hurt.
In other words, is it latency or bandwidth? Give 8K/sec I'm guessing it's
latency unless you're running a 64KBit line. Are you THAT
Now I'm confused...how can you be 50% faster if 90% of the time is in
retrieving from Oracle?
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Werner Smit
Sent: Wed 7/14/2010 11:11 AM
To:
Can you answer #3 though?
Does anybody know how to make the journal file go to a different location than
the database? Apprarently it's not treated as a "temporary" file. Perhaps it
should be??
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
According to my math your final database size should be on the order of 100Meg?
That means at 200 minutes and 1,000,000 records:
83 inserts per second
8333 bytes per second
Both of these values are terrible.
#1 What kind of network connection do you have? 100BaseT?
#2 What kind of server
You've got the source code. Modify sqlite3journalopen to put your journal in
%TEMP% or or maybe getcwd().
I couldn't quite figure out where the journal filename is set -- there's no
db-journal in the code so the name setting appears magjic to me. Since you've
got complete control over the
Can you give us the values in your table?
This works for me on 3.6.23.1
create table t (i integer);
insert into t values(634355968);
select datetime((i/100)-62135596800,'unixepoch') from t as expr1;
2011-03-13 07:06:40
Michael D. Black
Senior Scientist
Northrop Grumman Mission
I must be missing something...why does a read-only database require WAL at all?
If you can't update tables then how can you use WAL?
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Noah
Are you serious??? Run fast...more CPU...run slow...less CPU...you're choice.
If you want to run less then 9000 rows/seconds put a sleep in there somewhere.
The only reason you're at 30% and not 100% is due to your disk-speed limitation.
I really can't see what you're complaining about.
Is there any reason why you need to bind it?
Can't you just build the SQL string yourself? As long as your IN parameters
are well-controlled I don't think it should be a security risk. Plus you can
check for more then one"(" after you build the string.
#include
#include
int
Do you maybe want a combination of
http://www.sqlite.org/c3ref/progress_handler.html
And
http://www.sqlite.org/c3ref/interrupt.html
If you really need asynch queries then I think you'll have to thread it or fork
it yourself.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
Combining your transactions would probably help a fair bit.
And I think you're sleeping WAY too long.
Besides upgrading your sqlite use sqlite3_busy_timeout() -- it will handle the
sleeps for you and do it much faster than what you're doing (besides doing it
automaticalliy for you whenever it
Oops -- sorry guys...I got a little click-happy...not enough caffeine yet...
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
___
sqlite-users mailing list
sqlite-users@sqlite.org
Version 1.44 checked in.
I also added a setDatabaseFile(char *) and getDatabaseFile() just now complete
the file name set.
cluster = new Cluster();
cluster->setDatabaseFile("cluster.db");
cluster->dbDelete();
cluster->setHistoFile("histo.csv");
You must be thinking of Java or such -- C doesn't do concatenation that way.
There is a strcat() function but that's an ugly way to do it.
Here's how I'd do it:
int language=6;
int nbytes;
char sql[65535]; // big sql buffer to store whatever we need
nbytes=snprintf(sql,sizeof(sql),"SELECT
: [sqlite] EXTERNAL:Re: EXTERNAL: setup sqlite in vc++
Here is my email address fixed-term.seak.meng...@us.bosch.com
Thanks
Black, Michael (IS) wrote:
>
> I've got Visual Express 2008 C++ -- I made a Win32 console application and
> compiled this just fine.
>
> If you want to
I've got Visual Express 2008 C++ -- I made a Win32 console application and
compiled this just fine.
If you want to send your email address I'll email you the project and you can
try it on the non-Express version.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
Of course it's possible -- multiple clients accesing the database is just fine.
Is there any reason you need exclusive access for each thread in ping-pong
mode? If not, just handle the BUSY in both places.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
Didn't we just answer this or similar?
Download the amalgamation and include sqlite3.c in your project. You can put
whatever switches you want on it.
http://www.sqlite.org/download.html
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
3_open
> referenced in function _main
> 1>C:\Documents and Settings\My Documents\Visual Studio
> 2008\Projects\TestSqlite\Debug\TestSqlite.exe : fatal error LNK1120: 4
> unresolved externals
>
> Any ideas what I did wrong?
>
> Thanks
>
>
> Black, Michael (IS) wrote
You don't need C++ wrappers...just code in C. There's lots more C examples out
there than C++.
Easiest way for me to integrate is to download the amalgamation and include it
as a source file in your project.
The amalgamzation is at the top of the download page:
When you say "send it" do you mean you can mount the server file system?
If so, just attach a database table on the server and copy your database over
to it. The server can then copy it into memory. You just need some sort of
notification method (like a table with a boolean) to show who has
You'll find a LARGE performance improvement if you wrap your inserts inside a
BEGIN/COMMIT and only commit every 1000 or so inserts or such.
BEGIN
for all records
INSERT
count++
if ((count % 1000)==0) COMMIT;BEGIN // commit and begin again
end
COMMIT
Michael D. Black
Senior
I don't know about anybody else but I can't tell what you want to do.
Have you got some sample data and the results you expect from it?
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of
I think "-csv" is, in essence, just a shorthand for "-separator ,"
So in your first example you override it your semicolon with the -csv option.
Not a bug at all unless you think it should warn you every time you change the
separator (which would seem a bit much).
Michael D. Black
Daniel -- you need to give more info
C#'s exception messages are terrible and very non-specific as they simply
indicate failure and not why.
Use the C function fopen() to test your database file.
If you get an error back In your simple program display a dialog box with the
Try one directory up. It's not in the src directory Makefile.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Dr. David Kirkby
Sent: Thu 6/24/2010 10:10 AM
To: General Discussion of
You get the default for whatever platform you're compiling on.
Though I'm not sure if there's any advantage/disadvantage to 64-bit binaries
for sqlite3, is there?
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From:
Hmmma 6.5X speed diff between RAM and disk? Sounds pretty good to me. Not
sure why you expect better. 10,000/sec is crappy? And you think this
because
Several things you need to provide.
#1 What OS are you on? There are numerous disk speed testing programs
depending on your
You must not be a RHN subscriber. So you'll have to install from the CD.
You should be able to find gcc on the cd and do "rpm -i gcc*"
It might complain about needing some other things too which you will also need
to install.
Or...if you have an X window running your Add/Remove Software
You missed this step:
After you "su" you are "root".
Then:
yum install gcc
Then do your configure and install. Should work fine.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Glen
having seperate indexes in a case like
> this?
SQLite uses at maximum one index per table per query. So there is a
big disadvantage in having separate indexes especially if @IdClient is
not selective enough.
Pavel
On Thu, Jun 17, 2010 at 9:44 AM, Black, Michael (IS)
<michael.bla...@n
You probably don't have the gcc package installed. You're seeing an i386
compiler which may not produce what you want plus you won't necessarily have
all the header files you need. And did you add that directory path to cc1
yourself to your PATH? It's quite non-standard and should be removed
Is there any advantage/disadvantage to having seperate indexes in a case like
this?
In other words, as a simple design goal to have a separate index that matches
whatever you select on and order on?
It seems to me that if you do "SELECT * FROM log WHERE id_clie...@idclient
ORDER BY utc DESC
r Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Richard Hipp
Sent: Mon 6/14/2010 8:30 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] Mail loop?
On Mon, Jun 14, 2010 at 9:09 AM, Black, Michael
ission Systems
From: sqlite-users-boun...@sqlite.org on behalf of P Kishor
Sent: Mon 6/14/2010 8:12 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] Mail loop?
On Mon, Jun 14, 2010 at 8:09 AM, Black, Michael (IS)
<michael.bla...@ngc.c
: sqlite-users-boun...@sqlite.org on behalf of Richard Hipp
Sent: Mon 6/14/2010 8:30 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] Mail loop?
On Mon, Jun 14, 2010 at 9:09 AM, Black, Michael (IS) <michael.bla...@ngc.com
> wrote:
> The problem is that somebody has a
: sqlite-users-boun...@sqlite.org on behalf of Richard Hipp
Sent: Mon 6/14/2010 7:46 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] Mail loop?
It is not just you. But I have no idea what the problem is or how to fix
it.
On Mon, Jun 14, 2010 at 8:43 AM, Black, Michael
I've been seing this the last 2-3 weeks whenever I email the list...is it just
me???
This is the mail system at host sqlite.org.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail
The command-line interface is not multi-threaded so it all executes in sequence.
I can't imagine how many questions/problems would be on this list if it were
multi-threaded...yikes!!
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From:
Fri 6/11/2010 8:58 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] bug report: unhelpful error message
whendirectorypermissions are wrong
> What's different about your setup? Different permissions on the directory or
> file?
Try to make file -rw-rw-rw-.
Pavel
On F
I did the following...so what kind of permissions do you have that are
different from this?
drwxr-xr-x 2 root root 4096 Jun 11 08:40 ./
-rw-r--r-- 1 root root 2048 Jun 11 08:40 test.db
As a normal user I did this:
sqlite3 test.db
SQLite version 3.3.6
Enter ".help" for instructions
Assuming postgres can load SQL from a file you should be able to use named
pipes on all 3.
Here's windows:
sqlite> create table t (i integer);
sqlite> insert into t values(1);
sqlite> insert into t values(2);
sqlite> .output \\.\pipe\foo
sqlite> .dump
2nd window:
sqlite> .read \\.\pipe\foo
Pavel -- did you miss my test here?
sqlite> select * from t where c1>=5 and c2>0 and c2<='2';
sqlite> select * from t where c1<=5 and c2>0 and c2<='2';
sqlite> select * from t where c1=5 and c2>0 and c2<='2';
5|5
sqlite> drop index t_c1_c2;
sqlite> select * from t where c1<=5 and c2>0 and
This is a bit weird...it appears it's just the = operator causing this...
sqlite> select * from t where c1>=5 and c2>0 and c2<='2';
sqlite> select * from t where c1<=5 and c2>0 and c2<='2';
sqlite> select * from t where c1=5 and c2>0 and c2<='2';
5|5
sqlite> drop index t_c1_c2;
sqlite> select *
First off I assume you two know the difference between a DLL .LIB and a static
.LIB -- they are different.
I used Microsoft Visual C++ Studio 2010 Express and 2008 Express and downloaded
the windows sqlite3 DLL from the website
http://www.sqlite.org/sqlitedll-3_6_23_1.zip
#1 Open a Visual
Inside code you can use forward slash for path seperators (dang Microsoft for
ever introducing this backslash stuff).
so this works on ALL windows operating systems that I know of
.output c:/done.txt
Note though that if your user doesn't have admin priveledges they may not be
able to write
About the only thing you'll find cross-platform + embedded is C/C++
For an IDE use Code::Blocks as it is cross-platform Windows/Unix (no embedded
though of course). But does run gcc on both. And since gcc is a popular
choice for embedded that will maximize your code portability.
Michael D.
Nice example Gary...pretty clean. But...could I be so bold as to recommend you
complete it with BUSY and LOCKED possibilities? Man will likely use your code
as-is.
I remember a long time ago seeing some examples in a computer programming book
by Knuth or such in my college classes. Along
sqlite> create table t (d integer);
sqlite> insert into t values (datetime('now'));
sqlite> select * from t;
2010-05-29 11:19:20 << you'll note this should be in GMT
sqlite> select datetime(d,'localtime') from t;
2010-05-29 06:19:20
You can, of course, get your time in whatever format you
You also need to increase your cache size to match the mysql performance
pragma cache 10;
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Michael Ash
Sent: Fri 5/28/2010 9:57 AM
To:
MySql has a much larger default cache than sqlite3. That could be one rather
large difference in performance.
Try increasing sqlite3 cache from it's default of 2000k
PRAGMA cache_size=10;
Or more...
Also...no indexes on media or year? And what does MySql's explain say?
Michael D.
statements or steps, but this
would imply changing the underlying architecture of the application, so that
any plug-in or extension that accesses SQLite also reports how much data did
they change. It's not very convenient.
Kind regards,
Igor
Black, Michael (IS) wrote:
>
> So only do N many r
So only do N many records in one batch. That's the easiest thing. Forget
about the cache and just use responsiveness to adjust how many records you
allow at once.
Pseudo-code:
recnum=0
BEGIN;
while more records
INSERT
recnum++
if (recnum % 1000)
COMMIT;
One thing to be clear on. What OS are you running in your Virtualbox? I hope
it's not unix-flavored as that could/would be your problem.
Also...you didn't say that read/write worked over the UNC path...only that
read-only failed.
Michael D. Black
Senior Scientist
Northrop Grumman Mission
Or to more directly answer the question...
select * from phone where number like '%56%';
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Simon Slavin
Sent: Wed 5/26/2010 12:25 PM
To:
This works for me:
sqlite> create table t(t varchar);
sqlite> insert into t values('Testing*with asterisk');
sqlite> insert into t values('Testing without asterisk');
sqlite> select * from t;
Testing*with asterisk
Testing without asterisk
sqlite> select * from t where t like '%*%';
Testing*with
sqlite3 main.db < main.txt
or
cat main.txt | sqlite3 main.db
or
echo "create table tbl1(one varchar(10), two smallint);" | sqlite3 main.db
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on
You need to add your records in smaller batches and sleep just a little between
iterations.
Your batches will have to be small enough to make the user response time
reasonable.
You'll find that your loop of inserting records won't take long. It's when you
do the "COMMIT" that it locks
That's not a valid file path for open().
You need to mount the share as a drive before you can use it.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Art
Sent: Mon 5/24/2010 1:28 PM
To:
If you'll note in the code it does set lastErrno to the GetLastError() return.
Hopefully you have control of the code so you can add an "sqlite3_file_control"
call to see what's going on.
You should be able to do this when you get the SQLITE3_FULL return code.
int errnum;
h
Sent: Sat 5/22/2010 9:43 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] UTF16 - sqlite3_prepare16_v2
On Sat, May 22, 2010 at 09:23:06AM -0500, Black, Michael (IS) scratched on the
wall:
> I think you're making the mistake of thinking that the entire SQL
> strin
I think you're making the mistake of thinking that the entire SQL string is
UTF-16.
Look at the API for sqlite3_prepare16_v2
SQLITE_API int sqlite3_prepare16_v2(
sqlite3 *db, /* Database handle. */
const void *zSql, /* UTF-8 encoded SQL statement. */
It's your data
. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Black, Michael (IS)
Sent: Fri 5/21/2010 7:30 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] Fw: What languages can include SQLite statically
Or
fbc sqlite3_test.bas sqlite3.o
You didn't say what plafform you're running on so I assume 32-bit Windows?
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Black, Michael (IS)
Sent: Fri 5
-boun...@sqlite.org on behalf of Gilles Ganault
Sent: Fri 5/21/2010 6:41 AM
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] What languages can include SQLite statically?
On Fri, 21 May 2010 06:28:20 -0500, "Black, Michael (IS)"
<michael.bla...@ngc.com> wrote:
>It looks like Fr
It looks like FreeBasic should work
http://www.freebasic.net/
You just have to build the include file -- hopefully that's not too hard for
you as you probably only need a few of the functions.
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From: sqlite-users-boun...@sqlite.org on behalf of Black, Michael (IS)
Sent: Wed 5/19/2010 2:49 PM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] SQLite file Validation
When you say "create a function" -- sure you can write your o
When you say "create a function" -- sure you can write your own program that
would do that -- but it sounds like you want something to intercept all the
calls, yes?
You could create an insert or update trigger. Then write your own cleanup
sqlite function to stick in the trigger.
Shouldn't
Are you putting single quotes around it? That's what you need.
sqlite> create table text (t1 text, t2 varchar);
sqlite> insert into text values ('01234','01234');
sqlite> select * from text;
01234|01234
sqlite> insert into text values (01234,01234);
sqlite> select * from text;
01234|01234
Try showing us an "explain" of your statements.
Also seeing your table structure might help.
I take it you have a lot of keywords (like multiple 100,000's)
Michael D. Black
Senior Scientist
Northrop Grumman Mission Systems
From:
about 10ms
IIRC).
Pavel
On Tue, May 18, 2010 at 1:50 PM, Black, Michael (IS)
<michael.bla...@ngc.com> wrote:
> Rats on the interprocess locks.
>
> I was still talking about sleeping for spinning the BUSY return -- but just
> doing it as fast as possible without using much CPU inst
an Mission Systems
________
From: sqlite-users-boun...@sqlite.org on behalf of Jay A. Kreibich
Sent: Tue 5/18/2010 2:12 PM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] read only databases and in-memory databases
On Tue, May 18, 2010 at 12:50:20PM
CPU why not spin the BUSY as fast as
> possible?
Spinning without sleeping *always* burn *a lot* of CPU, no matter what
you do inside your cycle.
Pavel
On Tue, May 18, 2010 at 1:24 PM, Black, Michael (IS)
<michael.bla...@ngc.com> wrote:
> Actually I wonder if the sqlite3 mutex call
2010, at 4:19pm, Black, Michael (IS) wrote:
> Interesting...but that logic means that later processes might get their
> results before earlier ones.
There is no harm in this. In fact it's a characteristic of parallel systems.
If it truly mattered which order the results arrived in, you
...@sqlite.org on behalf of Sam Carleton
Sent: Tue 5/18/2010 9:57 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] read only databases and in-memory databases
On Tue, May 18, 2010 at 7:35 AM, Black, Michael (IS) <michael.bla...@ngc.com
> wrote:
> I think I see a potentia
: General Discussion of SQLite Database
Subject: Re: [sqlite] read only databases and in-memory databases
On Mon, May 17, 2010 at 2:27 PM, Black, Michael (IS) <michael.bla...@ngc.com
> wrote:
> Not rude -- just a communications problem...
>
> There's a difference between read-onl
it in read-only, fore it plays
nicer with other threads that are also doing read-only operations.*
Sam
On Mon, May 17, 2010 at 10:48 AM, Black, Michael (IS) <
michael.bla...@ngc.com> wrote:
> By "breakdown in communications" you must mean lost data or incomplete
> result
alf of Sam Carleton
Sent: Mon 5/17/2010 9:04 AM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] read only databases and in-memory databases
On Mon, May 17, 2010 at 9:32 AM, Black, Michael (IS) <michael.bla...@ngc.com
> wrote:
> Well...you don't say what "problem&qu
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