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Re: Estouro de arquivo temporário - Chunk

Posted By: Fernando Nunes
Date: Tuesday, 4 October 2011, at 7:17 p.m.

In Response To: Re: Estouro de arquivo temporário - Chunk (RAFAEL LIMA)

Rafael,

Como salvo erro disse o Alexandre, há aí uma aparente confusão, mas que faz
toda a diferença.
Você diz que o espaço livre diminui num chunk que pertence ao dbspace "prd"
que é um dbspace não temporário.

As estruturas causada por queries em cima de views são estruturas
temporárias e que devem ir para os DBSPACEs temporários.
No seu caso o espaço está a ser consumido num dbspace "regular".

Alguma coisa no seu código cria tabelas temporárias sem usar a cláusula
"WITH NO LOG"?
Tente fazer um onstat -g ses <id_sessao>
sendo "<id_sessao> o session ID de uma das suas sessões Java

Tabelas temporárias sem a cláusula acima fazem "log". E essas são colocadas
no DBSPACE da base de dados (acredito que a sua BD tenha sido crirada no
dbspace "prd", ou no root dbs

Em vez de parar a instância pode tentar parar só as componentes/sessões que
causam isto (java?)

Em tempos houve bugs/problemas com a escolha da localização de objectos
"temporários". Mas penso que nessa versão não deveria haver.
Seria de ponderar abrir um PMR na IBM para que possam ajudar a
investigar/resolver a questão.

Cumprimentos.

2011/10/4 RAFAEL LIMA <rafael@relato.com.br>

> Bom dia Jairo, tudo ok?
>
> A versão do banco é "IBM Informix Dynamic Server Version 11.50.FC6WE".
>
> Executei o comando: (onstat -c | grep DBSPACETEMP) o resultado foi este:
> # DBSPACETEMP - The list of dbspaces used to store temporary
> DBSPACETEMP prd_tmp_1,prd_tmp_2,prd_tmp_3,prd_tmp_4
>
> Creio que a primeira linha seja um comentário, correto? E pelo que entendi,
> foram definidas 4 áreas temporárias.
>
> Para monitorar os espaços utilizados pelas áreas temporárias estou usando o
> comando (onstat -d), que resultou nisto:
>
>
> ################################################################################
> IBM Informix Dynamic Server Version 11.50.FC6WE -- On-Line (Prim) -- Up
> 23:27:27 -- 6160256 Kbytes
>
> Dbspaces
> address number flags fchunk nchunks pgsize flags owner name
> 15d495028 1 0x40001 1 1 2048 N B informix prd_root
> 15ee11cd8 2 0x40001 2 1 2048 N B informix prd_plog
> 15ee11e70 3 0x40001 3 1 2048 N B informix prd_llog
> 15ee10710 4 0x42001 4 1 2048 N TB informix prd_tmp_1
> 15ee108a8 5 0x42001 5 1 2048 N TB informix prd_tmp_2
> 15ee10a40 6 0x42001 6 1 2048 N TB informix prd_tmp_3
> 15ee10bd8 7 0x40001 7 1 2048 N B informix prd
> 15ee10d70 8 0x40001 8 1 2048 N B informix prd_sped
> 15ee12028 9 0x40001 10 1 2048 N B informix prd_admin
> 15ee121c0 10 0x42001 9 1 2048 N TB informix prd_tmp_4
> 10 active, 2047 maximum
>
> Chunks
> address chunk/dbs offset size free bpages flags pathname
> 15d4951c0 1 1 0 500000 495687 PO-B- /banco/prd/prd_root.000
> 15ee12358 2 2 0 250000 0 PO-B- /banco/prd/prd_plog.000
> 15ee12548 3 3 0 2000000 0 PO-B- /banco/prd/prd_llog.000
> 15ee12738 4 4 0 500000 496282 PO-B- /banco/prd/prd_tmp_1.000
> 15ee12928 5 5 0 500000 496919 PO-B- /banco/prd/prd_tmp_2.000
> 15ee12b18 6 6 0 500000 496600 PO-B- /banco/prd/prd_tmp_3.000
> 15ee12d08 7 7 0 45000000 7492915 PO-B- /banco/prd/prd.000
> 15ee15028 8 8 0 4500000 4010191 PO-B- /banco/prd/prd_sped.000
> 15ee15218 9 10 0 1000000 996454 PO-B- /banco/prd/prd_tmp_4.000
> 15ee15408 10 9 0 500000 449051 PO-B- /banco/prd/prd_admin.000
> 10 active, 32766 maximum
>
> NOTE: The values in the "size" and "free" columns for DBspace chunks are
>
> displayed in terms of "pgsize" of the DBspace to which they belong.
>
> Expanded chunk capacity mode: always
>
>
> ################################################################################
>
> Quando começo a executar select's das minhas VIEWS reparo que o espaço
> livre
> vai diminuindo, mais precisamente desta área:
>
> 15ee12d08 7 7 0 45000000 7492915 PO-B- /banco/prd/prd.000
>
> O que ocorre, é que consigo executar minhas VIEWS, mas chega um ponto,
> normalmente final de mês, quando a empresa tem um volume bem maior de
> consultas, que há este estouro de arquivo temporário. E a única solução que
> eles encontraram é baixar o banco, reiniciar a máquina e subir novamente,
> acho
> que com isso a área temporária é zerada correto ?
>
> Não sei se eles executam mais algum comando para liberar esta área, mas
> acredito que o procedimento seja este apenas.
>
> Pelo que entendi, eles deveriam aumentar o tamanho destas áreas então ?
> (prd_tmp_1,prd_tmp_2,prd_tmp_3,prd_tmp_4).
>
> Quanto ao driver JDBC, vou montar uma classe de exemplo, mas acredito que
> ele
> nem seja o maior problema neste caso, o driver que uso atualmente parece
> ser
> compatível com esta versão do banco, certo ?
>
> Muito obrigado pela ajuda e desculpe pela falta de conhecimento,
>
> Rafael Lima
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Fernando Nunes
Portugal

http://informix-technology.blogspot.com
My email works... but I don't check it frequently...

--0016e6de17b8716c6504ae814b18

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