Range of values Minimum: the largest among the absolute file numbers of the datafiles in the database Maximum: operating system-dependent Basic No Oracle RAC Multiple instances must have the same value. DB_FILES specifies the maximum number of database files that can be opened for this databas...
Oracle的exp工具有一个query参数可以指定一个where条件来有条件地导出记录,对于不经常用这个选项的人来说,经常会遇到这样的错误: LRM-00112: multiple values not allowed for parameter 'query' EXP-00019: failed to process parameters, type 'EXP HELP=Y' for help EXP-00000: Export terminated unsuccessfully ...
The compiler itself is not multithreaded. You can expect better performance with MP systems, because the computer always has many other processes running at the same time as any one compilation. If you use (one of the tools that ships with the compiler), you can run multiple compilations simu...
Non-Prefixed - Does not support partition pruning, but is effective in accessing data that spans multiple partitions. Often used for indexing a column that is not the tables partition key, when you would like the index to be partitioned on the same key as the underlying table. #分前缀索引...
SQL exec dbms_streams_auth.grant_admin_privilege('user') * ADD SCHEMATRANDATA can be used instead of the ADD TRANDATA command when DDL replication is not enabled. Note, however, that if a table has no primary key but has multiple unique keys, ADD SCHEMATRANDATA causes the database to ...
When a cell gets a Smart Scan-enabled query from the database node via iDB, it checks which regions of the storage will not contain the data. For instance if the query predicate states where rating = 3, a region on the disk where the minimum and maximum values of the column RATING ...
replaced by values described the db-param.cfg file. Listing 4‑39 showsthe content of a CTL when these parametersbelow are set in the db-param.cfg: rdbmsjcl_unload_utility_name:dsnuproc rdbmsjcl_unload_format_file:csv Listing4
(一)kernel.shmall = 2097152 # kernel.shmall参数是控制共享内存页数。Linux 共享内存页大小为4KB,共享内存段的大小都是共享内存页大小的整数倍。 如果一个共享内存段的最大大小是16G,那么需要共享内存页数是 16GB/4KB = 16777216KB/4KB = 4194304(页),也就是64Bit系统下16GB物理内存, ...
urlOptions := map[string]string { // values can be "required", "accepted", "requested", and rejected" "encryption": "required", } Client Data Integrity this option give the client control weather to user data integrity or not urlOptions := map[string]string { // values can be "requ...
Can be used multiple time. --oracle_fdw_prefetch: Set the oracle_fdw prefetch value. Larger values generally result in faster data transfer at the cost of greater memory utilisation at the destination. See full documentation at https://ora2pg.darold.net/ for more help or see manpage with ...