Indexed sequential access methodalso known as ISAM method, is an upgrade to the conventionalsequential file organizationmethod. You can say that it is an advanced version of sequential file organization method. In this method, primary key of the record is stored with an address, this address is ...
When multimedia DBMS services video data, the storage system for it needs a large disk bandwidth in order to provide more users simultaneously with the real time retrieval requests. So, the storage system of a multimedia DBMS generally has the structure of a disk array which consists of ...
Because the controlfile contains the SCN's for the last transactions, the controlfiles are constantly being updated. Normally, the I/O associated with the controlfile is small, but you can see high controlfile waits in the following circumstances: High DML periods - The controlfiles are continu...
DTS_E_CACHECOLDATATYPEINCOMPAT 字段 DTS_E_CACHECOLDATATYPEPROPINCOMPAT 字段 DTS_E_CACHECOLINDEXPOSMISMATCH 字段 DTS_E_CACHECOLUMNMAPPINGFAILED 字段 DTS_E_CACHECOLUMNOTFOUND 字段 DTS_E_CACHEFILEWRITEFAILED 字段 DTS_E_CACHELOADEDFROMFILE 字段 DTS_E_CACHERELOADEDDIFFERENTFILES 字段 DTS_E_CANCELRECEIVED...
1. Where the controlfiles are placed: Are all in the same disk? control_files +REDO01/<instance_name>/controlfile/current.256.856619303, +REDO02/spppr01/controlfile/current.256.856619303 2. Size of the control files SQL> SELECT nameFROMgv$controlfile; ...
In cases where the mining algorithm makes multiple passes over the data, it is also possible to cache the data in flat files rather than retrieve multiple times from the DBMS, to achieve better performance. Recent studies have found that for association rule mining, with carefully tuned SQL ...
In cases where the mining algorithm makes multiple passes over the data, it is also possible to cache the data in at files rather than retrieve multiple times from the DBMS, to achieve better performance. Recent studies have found that for association rule mining, with carefully tuned SQL ...