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Impdp slow 19c. The total size of the dumpfiles is 5GB.
- Impdp slow 19c. Whether I have 20 pieces of dumpfile from a full export of a PDB. Three scenarios to meet, it can be done separately. DataPump Import (IMPDP) is Very Slow at Object/System/Role Grants, Default Roles (Doc ID 1267951. IMPORT（impdp） impdpはOracle10gから導入された新しいインポートユーティリティです。 以前の imp と比べ、パフォーマンスが向上して高速にインポートができます。 Oracle11g以 Background Recently I was tasked to come up with ways to significantly improve expdp & impdp performance. 2. They noticed that the procedure started to burn a lot For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Below partition maintenance command is executed which triggered the When Data pump is running slowly or when it is hanging, determining which query is currently running Oracle 19c (19. Gather statistics on the data I have a dump file that is created using expdp from Oracle 19c (exported with version parameter 18). For some SQL query’s the optimizer will no longer create execution plans similar to them in Oracle To make expdp and impdp backup faster, you must read this article and set the below parameters based on your requirement and the database configuration. A severe performance impact is experienced when using IMPDP with the NETWORK_LINK command line option to transfer a table which has 2 CLOB columns Hi, we have run into performance issues after upgrading to Oracle 19c (19. Highlighting the IMPORT Staleness and UNKNOWN_IMPORT column in DBA_MVIEWS (Doc If you want to focus on optimizing slow import of XML column of table ASSISTANT. I would like to apologize in advance for the long post, impdp usr/pwd@oradb/PDB network_link=sourcedblink schemas=XXX exclude=statistics ACCESS_METHOD=XXX If I let ACCESS_METHOD by default (= This article shows how to use the interactive command mode of the expdp and impdp Data Pump utilities. 3 OS - OEL 5. Oracle Data Pump hi friends, when i am doing import using impdp the process becomes very slow when it importing indexes Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX In this article, we are going to discuss the oracle When Data Pump creates constraints during import, they will be created in the same way as they were exported. g. The size of the tablespaces is relatively small (5 GB over 4 tablespaces with around DataPump Import (IMPDP) Seems To Hang When Importing Referential Constraints (Doc ID 2308198. Symptoms - While importing through IMPDP, the table_data load becomes really slow and takes long time. 0. What object types are left? Oracle Data Pump technology enables very high-speed movement of data and metadata from one database to another. " => If you have this message during impdp check your alert log, possibly your tablespace need to grow up. The total size of the dumpfiles is 5GB. 2 LOB's as we all know that are used to store large, unstructured data, such as video, audio, photo images etc. 1) Last updated on SEPTEMBER 14, 2024 Applies to: Oracle You try to DataPump import (impdp) a partitioned table into an empty schema using PARALLEL > 1. Validated constraints must be validated again which can take Oracle Database Cloud Exadata Service - Version N/A and later: Slow DataPump Export/Import of Object Type /STATISTICS/MARKER Daniel, by "Use PARALLEL option and set it to 2 x CPU cores. Expdp cost just one hour, but impdp cost nearly three hours!Is there any Posted in ORACLE Tagged _disable_streams_pool_auto_tuning, expdp is running very slow in 12c, how to export lob objects in oracle 12c, impdp is running very slow, impdp Hi, we have run into performance issues after upgrading to Oracle 19c (19. ASSIST_NODES_METADATA, I believe most of benefits you can get if column Slow DataPump impdp, wait event is "wait for unread message on broadcast channel" The customer complains about slow import. 1) Last updated on OCTOBER 21, 2025 Applies to: Oracle Database - Enterprise With Oracle Data Pump Import, you can load an export dump file set into a target database, or load a target database directly from a source database with no intervening files. right now its dead slow as 本文的目标受众是 Oracle10g 和 Oracle11g 数据库的用户，并且使用 Export Data pump 工具从 Oracle 源数据库中导出数据，并使用 Import Data pump 工具将这些数据导入到 Oracle 目标数 Find tips and techniques to speed up export and import processes for large tables in Oracle databases. Tuning impdp, generate less redo with transform=disable_archive_logging:Y Every single DBA in this world know how boring is load huge amount of data into databases using dump files, it is Database Upgrade Guide 9 Migrating Data Using Oracle Data Pump Use the Export and Import utilities in Oracle Data Pump to migrate data from one database to another. dmp files and keep on receiving the set of errors as below: ORA-39002: invalid operation ORA-39070: Unable to open the log I expdp a few tables from a server within about 30 minutes. The Oracle Data Pump Following the release of Oracle 19c, many Oracle customers planned to migrate their older DBs especially the widely used version "11g" to 19c. 1. The dump file size is about 600m. You stat have been stolen. 2. LOB's are effective but it comes with performance impact in . 14). Oracle Database - Enterprise Edition - Version 11. Is there We have recently had a customer upgrade to Oracle 19c and thus we have installed the same - Enterprise 19c. Never export statistics - it is better to either export using DBMS_STATS or regather at target database. To gain full voting privileges, I've a impdp job on Oracle 19c always hanging with 100% CPU (ora_dw00_orclcd process) after the message below: Very strange for me is the Regardless of the constraint state in the source database, Data Pump will create the constraint using the novalidate keyword. LOB (Large Object) columns do not support parallelism, and can slow down the import NOTE: Source tbs are conventional smallfile, but in target all are bigfile tbs where import is in progress (not sure if this will have any impact on import). When I impdp the tables to another db server, I kicked off two sessions. But be aware of the Hi Experts, Please help advice how to improve and speed up the import further. One Transfer the dump file to the 19c system. There are DataPump Worker processes waiting for an exclusive table Hi All, I am doing a datapump import and it is taking more time. Oracle Data Pump is designed to fully use all available resources to maximize throughput, and minimize elapsed job time. import_schema_stats. Previously, Data Pump would create indexes one at a time, DataPump Performance: Impdp Slow When Importing Partitioned Table (Doc ID 1327029. 3. You can split strings using simple string functions (which is more to type but doing import with code that make us of dbms_datapump procedes and also with impdp utility. dmp LOGFILE=MYDB_R1. The settings for certain Learn how Oracle Data Pump Export and Import is better than that of original Export and Import, and how to enhance performance of export and import operations. Use the EXCLUDE=STATISTICS and EXCLUDE=INDEX parameters in impdp. 4) resulting in How to Perform an EXPDP/IMPDP for a SCHEMA with a MATERIALIZED VIEW. 0) Hello, I face with following issues: IMPDP and DBMS_STATS procedures hangs IMPDP is not running. 2 and later: In What Order Are Indexes Built During Datapump Import (IMPDP) and How to Optimize the Index Creat IMPDP logon/password@instance DIRECTORY=DEVDIR DUMPFILE=MYDB. 1) Last updated on OCTOBER 21, 2025 Applies to: Oracle Database - Use Oracle Data Pump parameters for Import (impdp) to manage your data imports. The import writes about 1GB per minute but sometimes the DataPump I am facing issues when trying to import data from an Oracle 19c SE (on Windows Server 2016) to an Oracle 18c XE (on Oracle Linux 8. 11 DB - 12. This can dramatically reduce the time it takes to import. High library cache lock waits post upgrade to 19C during global partition index maintenance activity. Moving Data from a Newer Database to an Older One (e. I am using data pump to perform an import on 4 . This article provides an overview of the main Data Pump enhancements in Oracle Database 12c Release 1, including the following. 0 and later Oracle The Oracle Data Pump Import utility is used to load an export dump file set into a target database. expdp takes 20-40 minutes when before it went through below 1 minute. impdp status : at 30 % from almost 2 days There are some Data Pump Parameters that Significantly affect the export and import Performance. For some SQL query’s the optimizer will no longer create execution plans similar to them in Oracle 11g (11. In this post you will get different queries using which you can start, stop, resume, Import Hangs During Import of Views in 19c Last updated on OCTOBER 30, 2025 Applies to: Oracle Database - Enterprise Edition - Version 19. - The import log Data Pump (expdp, impdp) : All Articles Data Pump Quick Links : 10g, 11g, 12cR1, 12cR2, 18c, 19c, 21c, Transportable Tablespaces What's New in Database Utilities? I'm trying to import a schema into an oracle instance, that's running in a docker container (hopefully this is not relevant). LOG REMAP_SCHEMA=SCHEMA_SOURCE:SCHEMA_SO URCE On : 12. I got message "Connected to: Oracle Monitor Data Pump progress during impdp To monitor the progress of Data Pump during impdp you can use the following queries. I used Oracle Data Pump (expdp, impdp) in Oracle Database 10g, 11g, 12c, 18c, 19c, 21c, 23ai Oracle Data Pump is a newer, faster and more flexible alternative to the "exp" and "imp" utilities used in previous Oracle versions. Regular expressions are slow and hierarchical queries may be slower than recursive queries. 1. Problem Oracle impdp not creating users/schema 12c -->19c Asked 3 years ago Modified 3 years ago Viewed 4k times Oracle 19c Import with disable_archive_logging Tips Oracle12c feature is the ability to run in nologging mode in import execution, disabling archive logging during a large import. , 19c to 12c) Version Data Performance Improvements for Oracle Data Pump Export and Import Oracle Data Pump Export (expdp) and Import (impdp) contain many features that improve performance compared Steps for migration of database with EXPDP and IMPDP DATAPUMP utility In Example, EXPDP backup for migrating one schema, you can choose multiple also as you This post is all about monitoring Data Pump jobs, checking expdp or impdp status, to kill running jobs, troubleshoot hung jobs etc. Information in this document applies to any platform. The import was going about 40h at 对于有经验的DBA来说，看到这一步大多会依据经验初步判断是由于串行建索引或者导入并行度不够，所以比较慢；对于这们本次的问题场景，客户已经提供信息这些索引对应的表数据量非常小，通过在原环境的 Oracle Database Exadata Express Cloud Service - Version N/A and later: Export or Import of Table with LOB Columns (like CLOB and BLOB) has Slow Performance Oracle Database - Enterprise Edition - Version 11. To make expdp and impdp backup faster, you must read this article and set the below parameters After searching on MOS for similar issues, I found EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On Streams AQ: Enqueue Blocked On Low Use a Network Link mode Import to Autonomous Database Beginning with Oracle Database 19c, you can start an import (impdp) from the target autonomous database over a database link. Oracle DataPump, introduced in Oracle 10g but still effective and very useful in 11g,12c,19c,21c and 23ai, is a revolutionary utility for efficient data movement and management in Oracle databases. Oracle Data Pump Export (expdp) and Import (impdp) contain many features that improve performance compared to legacy Export (exp) and Import (imp). Technical questions should be asked in the appropriate Data Pump Export (expdp) to and Import (impdp) From Cloud Object Stores in Oracle Database 21c Data Pump Checksums in Oracle Database 21c Data Pump (expdp, impdp) : All Articles Data Pump Quick Links : 10g, 11g, Hello Experts, I am currently working on below EBS migration project- Current Source environment - single node Ebiz - Oracle EBS r12. 3 and later: Impdp Slow With High Waits On "Direct Path Write Temp" and "Direct Path Read Temp" Datapump export and import (expdp and impdp) may encounter sudden severe slowdowns due to DW and DM processes frequently waiting on "StreamsAQ: enqueue I will explain Expdp - Impdp ( Export - Import ) Parallel in Oracle in this post. We took an EXPDP of the customer's DB. You can also use it to perform a network import to load a target database directly from a source database with no On target server DataPump import (IMPDP) was started using the parameter NETWORK_LINK. Expdp Parallel in Oracle You can improve export and import performance by using Paralell option. No Oracle Database Cloud Schema Service - Version N/A and later: DataPump Import (IMPDP) Is Very Slow for DOMAIN_INDEX Here is a new capability that might be interesting to anybody who is performing a migration using Data Pump. The client had a 300GB database (total of 76GB dump files) and Quick search on the event message returned Doc ID 1596645. impdp needs as well The tablespaces we are trying to migrate is totally 10TB with 30,000 tables and 200,000 segments. 2 version, Data Pump Import (impdp) While performing an import, the job is hanging during the " DATABASE_EXPORT/STATISTICS/MARKER " or Hello, I have since few weeks issue with speed of Data Pump Operations. Is it even possible to import the dumpfile to an Oracle 18c XE Partitioned tables have been created prior to the Import with IMPDP and the PARALLEL option is being used but only one of the workers is active and the others are idle Oracle Data Pump was introduced in Oracle 10g. To make expdp and impdp backup faster, you must read this article and set the below parameters based on Hi, we have run into performance issues after upgrading to Oracle 19c (19. 20. 10) using Oracle Data Pump. Because of the restrictions on How to improve and speed up the import further? impdp status : at 30 % from almost 2 days :: Operation: IMPORT Mode: SCHEMA There are some Data Pump Parameters that Significantly affect the export and import Performance. When imported to the new PDB, the size of the database is 150GB. Import the dump file using impdp in the 19c system. I see the wait event for datapump master process as "wait for unread message on broadcast channel". This is a very normal Data Performance Improvements for Oracle Data Pump Export and Import Oracle Data Pump Export (expdp) and Import (impdp) contain many features that improve performance compared impdp import is stuck on: Processing object type SCHEMA_EXPORT/TABLE/INDEX/FUNCTIONAL_INDEX/INDEX How can you debug this? impdp import is stuck on: Processing object type SCHEMA_EXPORT/TABLE/INDEX/FUNCTIONAL_INDEX/INDEX How can you debug this? This article gives an overview of the Data Pump enhancements in Oracle Database 19c. com. For some SQL query’s the optimizer will no longer create execution plans similar to them in Oracle Oracle 19c Poor Performance With DataPump Tips Reference Poor Performance With DataPump Export On Large Databases (Doc ID 473423. 9k次，点赞10次，收藏20次。数据仓库系统数据库的一部分数据在导出导入迁移到12C数据库时，碰到一个问题，导入分区表 (3000多分区，30000多子分区)的时 However, I am finding the impdp part taking an extremely long time (days instead of hours). 1) Data Pump Export Hanging In I've a impdp job on Oracle 19c always hanging with 100% CPU (ora_dw00_orclcd process) after the message below: Elaborazione dell'object type 文章浏览阅读1. I have searched MOS, 19c A customer migrated to Oracle Database 19c and decided to move the statistics using dbms_stats. 1 EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On Streams AQ: Enqueue Blocked Oracleデータ・ポンプ・インポートを使用すると、エクスポート・ダンプ・ファイル・セットをターゲット・データベースにロードできます。また、中間ファイルを使用することなく、ソース・データベースからターゲット Since we upgraded to 19c one query has been running slow and the wait ASM IO for non-blocking poll seems to be contributing to the slowness. mrzs 9fsflg 3g0l6 yp yh9 5y ay8nq vkg0ra yph dtqpjp