Coletando I/O estatísticas por tabela?

Sabemos que utilizando o STATSPACK ou o relatório UTLSTAT podemos gerar estatistias de I/O por tablespace. Porém podemos faze-lo tambem para as tabelas.

$ORACLE_HOME/rdbms/admin

sqlplus '/ as sysdba'

@catio.sql

exit;

O script catio.sql, criará a procedure sample_io e a tabela ( SELECT * FROM io_per_object;) para coletar as estatísticas de I/O para as tabelas.

Você pode consultar o cabeçalho do script para obter mais informações.

Comentários

Postagens mais visitadas deste blog

Index SKIP SCAN???

Index Skip Scan nada mais é que o "split" logico de um indice composto, ou seja, se sua clausula WHERE não tiver todos os campos do indice composto, ele é dividido em menores sub-indices Exemplo: -------- SQL> create table teste(a number,b number); Table created. SQL> begin 2 for i in 1..1000 3 loop 4 insert into teste values(i, 56); 5 end loop; 6 end; 7 / PL/SQL procedure successfully completed. SQL> create index idx_teste on teste(a,b); Index created. SQL> analyze table teste compute statistics; Table analyzed. SQL> explain plan for select /*+ index_ss(teste idx_teste) */ * from teste where b=56; Explained. SQL> start ?\rdbms\admin\utlxpls.sql -------------------------------------------------------------------------------- | Operation | Name | Rows | Bytes| Cost | Pstart| Pstop | -------------------------------------------------------------------------------- | SELECT STATEMENT | | 1...

Configurar Tamanho de UNDO e tempo de RETENÇÃO (UNDO_RETENTION)

-- Tamanho Undo Atual SELECT SUM(a.bytes) "UNDO_SIZE" FROM v$datafile a, v$tablespace b, dba_tablespaces c WHERE c.contents = 'UNDO' AND c.status = 'ONLINE' AND b.name = c.tablespace_name AND a.ts# = b.ts#; -- Blocos de UNDO por Seg. SELECT MAX(undoblks/((end_time-begin_time)*3600*24)) "UNDO_BLOCK_PER_SEC" FROM v$undostat; --Tamanho do Bloco SELECT TO_NUMBER(value) "DB_BLOCK_SIZE [KByte]" FROM v$parameter WHERE name = 'db_block_size'; -- Select calcula UNDO RETENTION SELECT d.undo_size/(1024*1024) "ACTUAL UNDO SIZE [MByte]", SUBSTR(e.value,1,25) "UNDO RETENTION [Sec]", ROUND((d.undo_size / (to_number(f.value) * g.undo_block_per_sec))) "OPTIMAL UNDO RETENTION [Sec]" FROM ( SELECT SUM(a.bytes) undo_size FROM v$datafile a, v$tablespace b, dba_tablespaces c WHERE c.contents = 'UNDO' ...

OHS 12c noprompt password when stop/start component

cd $OHS_DOMAIN/bin $ ./stopComponent.sh ohs1 Stopping System Component ohs1 ... Initializing WebLogic Scripting Tool (WLST) ... Welcome to WebLogic Server Administration Scripting Shell Type help() for help on available commands Reading domain from /u01/oracle/domains/ohs_domain Please enter your password : password Connecting to Node Manager ... Successfully Connected to Node Manager. Killing server ohs1 ... Successfully killed server ohs1 Successfully disconnected from Node Manager. Exiting WebLogic Scripting Tool. Done $ OHS_HOME/oracle_common/common/bin $ wlst.sh readDomain('/u01/oracle/domains/ohs_domain') ohs_domain>cd('/SecurityConfiguration/ohs_domain') set('NodeManagerUsername','weblogic') set('NodeManagerPasswordEncrypted','password') updateDomain() closeDomain() exit() $ ./startComponent.sh ohs1 Starting system Component ohs1 ... Initializing WebLogic Scripting Tool (WLST) ... Welco...

Dicas ORACLE DBA

Pesquisar este blog