How can I speed up my data pump import?

Speed Up The Data Pump Import In Oracle 19c

  1. – Disable the generation of REDO LOG data during the import by using this new impdp parameter:
  2. – Exclude statistics during the import — to be run separately after the import, this will be faster and bug free:

How can I speed up Oracle data pump export?

Here are tips to speed up export job when table mode is applied:

  1. Parallelize executions.
  2. Decompose a partitioned table into partitions in par files.
  3. Set the parameter ESTIMATE to STATISTICS.
  4. Turn on Asynchronous Disk IO.
  5. For 11.2 and later, set ACCESS_METHOD to DIRECT_PATH.
  6. For really big tables.

What is Expdp and Impdp used for?

The expdp and impdp clients use the procedures provided in the DBMS_DATAPUMP PL/SQL package to execute export and import commands, using the parameters entered at the command-line. These parameters enable the exporting and importing of data and metadata for a complete database or subsets of a database.

What is direct Y option in export?

When you use DIRECT=Y this causes export to extract data by reading the data directly, bypassing the SQL Command Processing layer. This method can be much faster than a conventional path export. Conventional path export uses the SQL SELECT statement to extract data from tables.

What is exclude statistics in Expdp?

We have used EXCLUDE=STATISTICS option in export data pump (expdp). When importing (impdp) to new database, you have noticed some missing INDEXES in target. If we remove EXCLUDE=STATISTICS option, then we can match all indexes.

What is Streams_pool_size?

The Streams pool is a shared resource, and the amount of memory a process can use from the Streams pool is determined by the application. The capture or apply parameter MAX_SGA_SIZE can be controlled for Oracle GoldenGate or XStream.

How do you use Parfile in Expdp?

Let’s do it.

  1. Step 1: Create a Directory. Note here, this step must be performed by DBA on server system.
  2. Step 2: Create Directory Object and grant mandatory privileges.
  3. Step 3: Create a parameter file.
  4. Step 4: Export Tables Using PARFILE.

Why Datapump is faster than exp?

Answers. Data pump is block mode and exp is a byte mode. So, block mode is always faster than the byte mode.

What is consistent y in Expdp?

The exp utility used the CONSISTENT=Y parameter to indicate the export should be consistent to a point in time. By default the expdp utility exports are only consistent on a per table basis.