, from my point of view H2 is a very good database especially in
embedded context!
Thanks!
Ulrich
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has no effect to the database size?
Why doesn't it fully use the MAX_COMPACT_TIME setting?
Why dosen't it touch the CHUNKS_FILL_RATE?
Can you give an hint how to restrict the database file size?
Thanks!
Ulrich
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>
> On Wednesday, June 22, 2022 at 9:17:39 AM UTC-4 Ulrich wrote:
>
>> The documentation says:
>> Using a lower value might be dangerous, unless the file system and hard
>> disk flush the buffers earlier.
>>
>> Is it safe to use RETENTION_TIME
The documentation says:
Using a lower value might be dangerous, unless the file system and hard
disk flush the buffers earlier.
Is it safe to use RETENTION_TIME=0? What are the consequences?
Do I have to fear that the database file becomes corrupted or that
transactions are not consistent?
I
My URL parameters are:
LOCK_TIMEOUT=8640;WRITE_DELAY=1;MAX_MEMORY_ROWS=100;MAX_OPERATION_MEMORY=5000;ANALYZE_AUTO=0
I'll check if the compact algorithm works (better) with the default
parameters.
andrei...@gmail.com schrieb am Donnerstag, 16. Juni 2022 um 03:31:05 UTC+2:
> I
Thanks for the clarification!
I will try to pause operations on the database and see what happens.
What do you mean with "while you run the compacter"? Is there a specific
command to start the compacter. I thought it would start automatically or
if I run SHUTDOWN COMPACT.
Noel Grandin
n the
> defined shutdown time period (longer will give more time to compact).
>
> And yes, H2 database consumes a lot of file space, especially when data
> are constantly written and deleted. I made exactly the same observation.
>
> Best regards
> Andreas
>
> On Mon, 2022-0
4916121600
info.CHUNK_COUNT 490
info.PAGE_COUNT 1594967
info.PAGE_COUNT_LIVE 440730
info.PAGE_SIZE 4096
info.CACHE_MAX_SIZE 16
info.CACHE_SIZE 15
info.CACHE_HIT_RATIO 85
info.TOC_CACHE_HIT_RATIO 99
info.LEAF_RATIO 44
Thanks!
Ulrich
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UTC+2:
> Use the UI I sent to you. It takes care of those challenges.
>
>
>
> Sent from my Galaxy
>
>
> Original message
> From: Ulrich
> Date: 10/06/2022 12:21 (GMT+01:00)
> To: H2 Database
> Subject: Re: [h2] Database corrupted after SH
Stop, I am silly. It overlooked that the file created by the BACKUP command
is a zip file. I tried to use it as database file...
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I think it has something to do with the BACKUP TO command.
I have done the following tests:
1) "Offline copy"
* Shutdown my application (using 2.1.212)
* copy the mv.db to my PC
* open it with the H2 console (2.2.219)
* run "SHUTDOWN COMPACT"
=> the database file shrinked and could be opened
I tried with the latest 219. The problem that the database corrupts when
running SHUTDOWN COMPACT still exist.
The compact is finished very fast but a .temp file remains in the database
folder.
Here is the content of the trace file:
2022-06-10 10:24:30 database: close
; Sent from my Galaxy
>
>
> Original message
> From: Ulrich
> Date: 10/06/2022 09:34 (GMT+01:00)
> To: H2 Database
> Subject: [h2] Database corrupted after SHUTDOWN COMPACT
>
> Hi all,
> I am migrating my application from H2 1.4.199 to H2 2
ng the H2 console without any parameter.
If you need a copy of the database please let me know.
Thanks!
Ulrich
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Small update:
Not working:
Predicate predicate = criteriaBuilder.isFalse(itemRoot.get("testFlag"));
Working:
Predicate predicate = criteriaBuilder.equal(itemRoot.get("testFlag"),
Boolean.FALSE);
Ulrich schrieb am Dienstag, 30. November 2021 um 17:23:40 UTC+1:
>
ression or if I made a mistake?
Thanks!
Ulrich
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