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Old 05-08-2005, 02:26 AM   #1
ramonf
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DBCache Tool for T5

Hi,

I found a utility named DBCache Tool, which I believe tries to stabilize the DBCache problems on the T5 (perhaps the Treo 650, too):

http://www.jade.dti.ne.jp/~imazeki/palm/DBcT/

The author is the person who wrote McFile, so I would imagine that this software is also well written.

The problem is that the documentation is in Japanese; but, I get the impression that after installing it and turning it on my T5 is loading programs slightly faster and I hope it is more stable.

So is any of you fluent enough in Japanese to explain to me how to use it?

Thanks,

Me
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Old 05-08-2005, 12:49 PM   #2
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Is this only for T5 or T3 too??


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Old 05-08-2005, 01:27 PM   #3
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Only for devices that use Buggy NVFS, i.e. the T5

Only for devices that use Buggy NVFS, i.e. the T5
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Old 05-08-2005, 01:31 PM   #4
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any ideas what does it do exactly? I took a look at the sys-translated files but didn't got a clue... any forum users around here that speak Japanese?
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Old 05-08-2005, 04:16 PM   #5
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Using Firefox's "translate to English" function :

Quote:
The DBCacheTool is the tool which tries checking and clearing the information indicatory of the DBCache of the NVFS which is loaded onto the TungstenT5 and being less crowded capacity.

* Quality and the point concerning cash being less crowded capacity et cetera which notes are described to the readme.txt. Before the introducing to read that it receives, we ask.
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Old 05-08-2005, 04:32 PM   #6
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Unhappy

The readme.txt is too hard to understand after using an automatic translator on it, though
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Old 05-08-2005, 09:18 PM   #7
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My freind programmed a great transalator but it's a cross-linear production he's going to try to sell it on the web for 19.99 it is a translator pack which can transalate any thing into English,Japanese,Spanish and French if you want more info on this product ( he rather i don't say it online) Im me ...TheMystery424 or email me noamulator424@YAHOO.COM
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Old 05-08-2005, 11:48 PM   #8
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Here is a machine-translated version (Note: "Cash" could also mean cache, 'coz it's the same pronounciation.) ** updated, probably a better translation.


DBCacheTool Ver0.1a README

Copyright (C) 2004 Hiroaki Imazeki All rights reserved.


* 1. In beginning
* 2. Notice
* 3. Prerequisite
* 4. Introduction manner
* 5. Usage
* 6. Restriction item
* 7. Ahead and the like communicating


1. In beginning

DBCacheTool is the tool which tries the check and recovery of
information display of DBCache of NVFS which is loaded onto TungstenT5
and being less crowded capacity.

Usually, the necessity to be conscious of the being less crowded
capacity of the cache does, e.g., (influence appears in speed at the
time of purge) being to be the expectation which is not excluding, but
when with TungstenT5 it is less crowded and capacity is small, there
are times when influence appears in operation, (the *1). For example
e.g., it becomes not be able to start application, is. Concerning this
status, after it was less crowded by the fact that HotSync is done and
it seems that capacity recovers but (the *2), immediately after the
resetting and it utilized the big database it is less crowded and
because there are times when capacity decreases, status to be
generated is a tendency which becomes easy.

Depending, it is provisional solution, but with DBCacheTool it is less
crowded and when capacity decreases, to the system it is less crowded
by the fact that it posts related to HotSync and recovery of capacity
is tried corresponds to this phenomenon (the *3).

Furthermore, because DBCacheTool as description above operates with
principle, to be less crowded in the same way by the fact that HotSync
is done making use of DBCacheTool when it is possible also and to make
capacity recover it is. There are times when it cannot start
application, but when there is an insecurity in the introduction of
DBCacheTool, concerning HotSync modus operandi
Please examine collectively.


* Please be sure to read
----
1) With 2004/12/02 present items of information, description
and the code of contents are created. When in the future, for example
the update and the like of ROM was done, there is a possibility
unconformity happening. In addition, conversely as for this kind of
tool there is also a possibility of becoming unnecessary. First,
please verify status such as update of the device manufacturer.

2) There is also an application where operation becomes unstable, by
modifying configuration when it becomes the status which resets worst
hard, it is. The case of utilization, INTERNAL volume is included in
advance and doing, in order to receive, prayer it does e.g., contents
of memory inside the computer back up.

In addition, including the problem and the like of system side,
because the various primary factors are related, when (it is difficult
mainly, it cannot cope the fact that it copes even with when trouble
is generated, please think) it is status distantly. In addition, also
degradation and the influence to hard with the fact that the frequency
which is hit in the cache decreases are thought. Understanding this
kind of demerit, after receiving, that introduction examination it
receives, we ask.

----

(*1)
Depending upon environment and modus operandi, there are also
times when influence does not appear. That kind of case, being
conscious, perhaps the necessity to change configuration it is not.


(*2)
Because it is unclear, if, but it was less crowded securely
and is not the information which guarantees the fact that capacity
recovers, in order the test it did with when HotSync is done, for
DBCache once to halt, it was less crowded and that capacity increases,
it was verified whether the specification of DBCache. With DBCacheTool
making use of this, it is less crowded and in order to make capacity
recover, it tries.


(*3)
At the time of all operating, it is not something which
guarantees correspondence. In addition, there are also times when the
error DBCache itself with the primary factor comes out. Please note.



2. Notice

* The DBCacheTool writer (now Seki Hiro discernment JBA00410)
there is a copyright of the program inside this package.
* The program inside this package distributes as the free software.
* It programmed used inside this package, or, the writer does not owe
the criticism concerning all damages due to not using and, here it
makes that either the obligation which in addition copes with trouble
and the like does not owe altogether clear.
* As for report of bug and demand, to writer? (A?  We ask with the
mail.
* It inhibits the modification to the PRC file.
* When the program inside this package is reprinted, beforehand
consultation in the writer.
* When the description regarding this software is done in the book and
the like other than the magazine, beforehand consultation in the
writer.


3. Prerequisite

It operates with TungstenT5. Perhaps, it operates even with
Treo650, but verification has not gone.


4. Introduction manner

From the file which is downloaded DBCacheTool.Fetching prc, please introduce on the device with such as HotSync. In
addition using DA, when it displays information and the like,
DBCacheDA.Please introduce also prc together.


5. Usage

When it does to activate DBCacheTool from the foam/home picture
and the like, the information of DBCache is displayed in picture top.
Size of the cache, being less crowded capacity, it is the maximum
which can be guaranteed in 1 instruction from above.


5-1.Activation
The tap please do the ON button of picture lower part. It is
less crowded under conditions below and it reaches the point where
recovery of capacity is executed.

When Soft reset check reset to entry is executed, always recovery
processing is run.

App stop check to entry
When halt processing of application was run, verifying the
capacity of free and max, when it is smaller than the value which is
specified, it runs recovery processing. In case of application change
other than activation command of standard, there are times when halt
cannot be recognized. For example, it is the record access and the
like from the search result.

Ctrl tap check to entry
When the tap doing the button and the like, verifying the
capacity of free and max, when it is smaller than the value which is
specified, it runs recovery processing.
* In the button and the like which is implemented individually
application, there are times when it does not react.

Free and max
App the value which does capacity verification with stop or
Ctrl tap configuration is specified. Because it is the value which
verifies, after executing recovery processing even, there are times
when it does not recover to the value which is specified (as for
especially max almost it does not recover). Furthermore, when 0 is
specified, value of the entry which is specified decreasing,
processing stops being run.

For example, free < max < at the time of 0, when free decreases than
4M, processing is run with 4M, but the value of max decreasing, it is
not executed.


5-2.Halt
Activating DBCacheTool from the foam/home picture and the like,
the tap please designate the OFF button which is as picture lower
part.


5-3.Specification every of application
The Apps button with tap thing, it can add can edit the
configuration every of application. Basically it is the same entry as
entire configuration, but 2 dots below differ.

Event Deq check to entry
Including App stop, and the like it deals with with all events.

First frm init check to entry
After the application activating, when first form opens, it is
executed.

* When it checks in Event Deq entry, whenever something it operates,
to become easily (the value of especially max, when it makes big ones
such as 8M, because), influence appears in speed of response in the
kind of status where processing is executed, please note.


5-4.Display of the information with DA and execution of processing

When DBCacheDA is activated from Launcher of DA, it is less
crowded and capacity is displayed. When here, the Clear button the tap
is done, execution of processing is specified to DBacheTool.


5-5.Deletion
After halting DBCacheTool, please delete with function of the
foam/home picture and the like.



6.Restriction item

Depending upon application there are some which are stopped
working just. When DBCacheTool has become ON, the starting HotSync and
posting the end are issued with the timing which usually differs. In
order not to cross over other than system module, it is implemental,
but it is not complete. Depending, in order to receive the posting
HotSync, with influence is a ? case in the application which does
register processing. In addition, in addition it is less crowded and
when capacity recovers, because the influence of DBCache it becomes
easy to come out, receiving the influence of DBCCache, itself the ?
it increases also the fact that it becomes error.

* As for the above-mentioned problem, it is the phenomenon which is
generated because DBCacheTool modifies the movement of original OS.
Question - please do not put out ? and the like to the application
creation origin even with when there is an application whose operation
is strange.

HotSync in operation, halts the processing of DBCacheTool. It halts
also the configuration every of application and the specification etc.
from DA.

When recovery and processing are executed, until the data is
registered to the cache for the second time, change processing and the
like of application becomes slow. For example, when change of
application doing, several seconds? Several dozen seconds it is the
status and the like where the picture does not change.

Recovery and processing being run, when it is less crowded and
capacity (especially max) does not increase, it is.

Because it means to decrease the effect of the cache, perhaps
influence appears in the battery and memory.

As for the cache capacity of TugstenT5 10M it is described in the
document and the like but (2004/12/2 presently), with DBCacheTool
approximately 14M it is displayed. Acquiring with the procedure which
is stated in the document, because it is the result, you can think "of
the bug" description the bug of the mistake "DBCache very thing" of
DBCacheTool "and so on, but cause is unclear.

In addition
Still, you think that the problem which with the writer is not
perceived is mainly left.


7. Ahead and the like communicating

Basic
If it is E-MAIL, imazeki@jade.Dti.Ne.Jp

In addition, mail address and the like is described to also my
home page.

Http: /Www.Jade.Dti.ne.Jp/- Imazeki/Palm/

Last edited by KY933 : 05-09-2005 at 12:17 AM.
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Old 05-09-2005, 07:37 AM   #9
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Quoting ernestn of KVPUG link :

T5 Memory Info.

TT5 Memory:
1) 55 MB internal NAND Flash as "internal" storage (like
2) 155MB NAND Flash as INTERNAL storage

Besides TT5's NAND Flash, T5 has "32MB of RAM".
i) 4MB (may be 6MB) RAM is used for "Dynamic heap"
ii) 18MB (may be 16MB) RAM is used to store ROM image software
iii) The remaining 10MB RAM is used to swap data/programs stored in the 55MB internal NAND Flash when need.

"DBCache is used to handle & free up memory for these 10MB RAM(iii) to reduce the change of insufficient memory error. "

I tried this software before but the "memory error" still happened occasionaly. Beside this, sometimes it will take up 1~2s cleaning the cache after exit a program (For myself - It's like slowing down the system, although it is actually cleaning the cache - I guess.) Thats why I didn't recommend to you guys. (I read Japanese but sorry that the Japanese Readme is too diffuclut for me to transalate.) Basically it said this program is to release the unwanted cache after exit a program -T5 won't automatic clean up the cache after we exit the program.
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Old 05-09-2005, 09:11 AM   #10
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this snippet is from resco.net

NVFS databases can't be accessed directly. Therefore Palm OS reserves part of RAM called DbCache.

Prior to its use the databases are copied from NVFS to the DbCache and after the use they are copied back (if changed).

DbCache gets subsequently filled because the databases are not immediately purged from the DbCache, but (for performance reasons) stay in the cache as long as there is enough space.

On T5 the DbCache has 10 MB and it is considered full when the free space reaches approx. 1MB.
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Old 05-09-2005, 10:31 AM   #11
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can you tell me what the

App stop
Ctrl tap

free < 4M
max < 0

options are?
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Old 05-10-2005, 06:17 PM   #12
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I think more T5 users should try this app out. Programs seems to load faster and BAckupbuddyVFS (the latest beta) now runs without any errors.
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Old 05-10-2005, 10:29 PM   #13
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Quoting Clieman in KVPUG :

"The T5 stores program ini flash, and this is what the 64MB memory is about. Since all computer need some sort of volatile memory, the T5 has 32MB of RAM (which Palm kept a low profile on this), and out of this 32MB of RAM, only 14MB is available to any program (from DBcache info). The way RAM is handle is totally different from the previous Palm without NVFS, and the free RAM available keep running lower and lower everytime you run any program (fragmentation?). So that's reason behind why:

1. You get out of memory error in Blazer even if you have more than 50MB of unused memory (from Application/Info)
2. You get application crashes when it demands more RAM than the free RAM available. This is where most of the application crashed.

Last night I was playing around with my T5 and managed to get the RAM below 3 to 4MB, then I launched Plucker, and view a doc with lots of graphics (Comic strips), and I saw this out of memory error and the PDA crashed. Then I realised that the "Add" program function in DBcache. That allows you to free up a specific amount of RAM before you run the program. So I set 6M for Plucker and hopefully I won't see the out of memory crash again. You can do the same for those program which demands lots of RAM using this "Add" program function. It also lets you free up the RAM before or after running your program.

One good trick is to add "Application" to the program so that it free up the RAM whenever you quick to Application.

p/s From the option in the program I don't think DBcache will clean up the RAM if it is not running. So you have to set "Auto Clear" to ON and run the program manually once in a while to check."
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Old 05-11-2005, 01:56 AM   #14
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thanks palmdoc. This is valuable information, indeed.

Any more help with the functionalituy of the program would be much appreciated...
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Old 05-11-2005, 11:15 AM   #15
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Hi folks,

I have been trialing DbCache tool, and here is what I've found.

DbCache Tool setup:

Autoclear on App Stop
Free < 4M
Max < 0

I created a sort of assault course for my T5 consisting of half a dozen apps, in each of which I opened several large databases, one after another.

I repeated exactly the same routine several times with DbCache Auto Clear selected on, and off. I always started with a soft reset.

Here are the results:
With Auto Clear Off, the T5 always crashed at the same point.
The times:
1:05
1:05
1:04
1:00

With Auto Clear On, the T5 successfully completed the routine with no crashes. The times on passing the point at which it crashed in the previous test are:
1:15
1:23
1:17
1:20

Hence it appears that DbCache makes the T5 more stable, but slower.

I will, for the moment, be keeping DbCache in my T5.
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