On Tue, 2008-12-23 at 03:56 +0100, wman wrote:
Thanks to you all for inspiration.
My web app (which otherwise ran ok) was getting stuck while getting
harassed by ab (apache-benchmark) after receiving some 800+ requests
in short succession (not less, never gotten to 900, what was weird
that
Don Stewart d...@galois.com wrote:
Modify the 'unsafe' inports to be 'safe'? I don't think HDBC is going
to call back in, so should be fine. John?
For those who are puzzled, Don is suggesting that
foreign import ccall unsafe foo :: Bar - Baz
should simply be changed to
foreign import
On Mon, 2008-12-22 at 10:30 +, Malcolm Wallace wrote:
For those who are puzzled, Don is suggesting that
foreign import ccall unsafe foo :: Bar - Baz
should simply be changed to
foreign import ccall safe foo :: Bar - Baz
And in case anyone is wondering whether fiddling with
Duncan Coutts wrote:
On Mon, 2008-12-22 at 10:30 +, Malcolm Wallace wrote:
The terminology seems counter-intuitive, but in other other words, a
safe call is slower but more flexible, an unsafe call is fast and
dangerous. Therefore it is always OK to convert an unsafe declaration
into a
Hi,
I am not yet 100% certain that the unsafe calls are indeed the cause of
the problem, eventhough I strongly suspect there are.
I can tell you more once I have managed to rewrite all unsafe calls into
safe once, reinstall HDBC.Sqlite3 and then run my app again to see the
effects. My
Günther Schmidt wrote:
Hi,
I am not yet 100% certain that the unsafe calls are indeed the cause of
the problem, eventhough I strongly suspect there are.
I can tell you more once I have managed to rewrite all unsafe calls into
safe once, reinstall HDBC.Sqlite3 and then run my app again
John Goerzen schrieb:
Günther Schmidt wrote:
Hi,
I am not yet 100% certain that the unsafe calls are indeed the cause of
the problem, eventhough I strongly suspect there are.
I can tell you more once I have managed to rewrite all unsafe calls into
safe once, reinstall HDBC.Sqlite3 and
From: haskell-cafe-boun...@haskell.org
[mailto:haskell-cafe-boun...@haskell.org] On Behalf Of Günther Schmidt
I understand that Takusen does not use unsafe calls and
would like to
try it with that one then, but haven't find enough docs yet
on how to use
Takusen.
Not a lot of
On Mon, 2008-12-22 at 08:15 -0600, John Goerzen wrote:
Duncan Coutts wrote:
On Mon, 2008-12-22 at 10:30 +, Malcolm Wallace wrote:
The terminology seems counter-intuitive, but in other other words, a
safe call is slower but more flexible, an unsafe call is fast and
dangerous.
On Mon, Dec 22, 2008 at 04:28:03PM -, Bayley, Alistair wrote:
From: haskell-cafe-boun...@haskell.org
[mailto:haskell-cafe-boun...@haskell.org] On Behalf Of Günther Schmidt
I understand that Takusen does not use unsafe calls and
would like to
try it with that one then, but
Hi guys,
I just tried to forkIO-off the database code to keep the UI responsive
using Takusen with Sqlite this time.
The problem persists though, the UI freezes.
AFAIK the sqlite-Takusen code does not use unsafe ccall which would block
the thread, so that might not be the cause of the
On Mon, 2008-12-22 at 22:12 +0100, Günther Schmidt wrote:
Hi guys,
I just tried to forkIO-off the database code to keep the UI responsive
using Takusen with Sqlite this time.
The problem persists though, the UI freezes.
You might need to provide us more details on the GUI code. As I
Hi,
I put in on hpaste:
http://hpaste.org/13264
slightly simplified
Günther
Am 22.12.2008, 22:36 Uhr, schrieb Duncan Coutts
duncan.cou...@worc.ox.ac.uk:
On Mon, 2008-12-22 at 22:12 +0100, Günther Schmidt wrote:
Hi guys,
I just tried to forkIO-off the database code to keep the UI
Thanks John! I've been running into this quite a bit with the ODBC backend
as well. Having an entire server app freeze because MS SQL Server decides to
deadlock is rather unpleasant.
Cheers,
Sterl.
On Mon, Dec 22, 2008 at 3:59 PM, John Goerzen jgoer...@complete.org wrote:
On Mon, Dec 22, 2008
On Mon, 2008-12-22 at 22:55 +0100, Günther Schmidt wrote:
Hi,
I put in on hpaste:
http://hpaste.org/13264
slightly simplified
Ok, that works fine when the action is something like threadDelay so
it's clearly not blocking the UI.
Duncan
___
Hi Duncan,
are you saying then that the db-code is what's blocking the UI?
Günther
Duncan Coutts schrieb:
On Mon, 2008-12-22 at 22:55 +0100, Günther Schmidt wrote:
Hi,
I put in on hpaste:
http://hpaste.org/13264
slightly simplified
Ok, that works fine when the action is
You shouldn't need forkOS, but without -threaded (and related RTS
switches to enable multithreading) I think you are sunk. Without
enabling multithreading support, you are saying that your program
(which might use concurrency features of Haskell) will run on a single
OS thread. During a foreign
Hi Ryan,
BINGO!
that did it.
Thanks a lot. It certainly works now, finally, eventhough I don't really
know what the implications are.
Günther
Am 23.12.2008, 02:14 Uhr, schrieb Ryan Ingram ryani.s...@gmail.com:
You shouldn't need forkOS, but without -threaded (and related RTS
switches to
Günther Schmidt wrote:
Hi Ryan,
BINGO!
that did it.
Thanks a lot. It certainly works now, finally, eventhough I don't really
know what the implications are.
Did it still work with the unmodified HDBC as well? Just curious.
-- John
___
Thanks to you all for inspiration.
My web app (which otherwise ran ok) was getting stuck while getting harassed
by ab (apache-benchmark) after receiving some 800+ requests in short
succession (not less, never gotten to 900, what was weird that running like
500 reqs - pause - 500 reqs ... went
Hi Günther,
Hi Mads,
I'm using HDBC with sqlite3
Looking at
http://software.complete.org/software/repositories/entry/hdbc-sqlite3/Database/HDBC/Sqlite3/Connection.hs
and
http://software.complete.org/software/repositories/entry/hdbc-sqlite3/Database/HDBC/Sqlite3/Statement.hsc
you can see
redcom:
Hi Mads,
I just noticed that too.
I had been wondering why this problem does not occur with the sample app
from RWH eventhough I was employing the same technics as they did.
It just occured to me that all the DB interactions in their app are fairly
short and thus the
Hi Mads,
I just noticed that too.
I had been wondering why this problem does not occur with the sample app
from RWH eventhough I was employing the same technics as they did.
It just occured to me that all the DB interactions in their app are fairly
short and thus the problem never becomes
Hi Don,
Modify the 'unsafe' inports to be 'safe'? I don't think HDBC is going to
call back in, so should be fine. John?
Sorry, total noob here, could you be more specific?
Günther
That said, we use Takusen or sqlite3 at work, without troubles.
I might also check into that.
-- Don
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