streams aq enqueue blocked on low memory

Streams aq enqueue blocked on low memory how to#

See the next section after the overview for details about these defects and possible workarounds. This status information is written only to your standard output device, not to the log file (if one is in effect).ĬHECK ACTIVITY OF DATA PUMP KNOWN DEFECTS OVERVIEWīelow an overview of known performance related defects in the various Oracle10g and Orace11g releases.

Export/Import Data Pump parameter: STATUS.

Note:421441.1 'Datapump Import With dblink Going Slow With cursor_sharing Set to 'force'' Note:94036.1 'Init.ora Parameter 'CURSOR_SHARING' Reference Note' Note:429846.1 'Slow Data Pump with REMAP_SCHEMA and REMAP_TABLESPACE parameters'

Import Data Pump parameters: REMAP_SCHEMA or REMAP_TABLESPACEįor details related to this issue, see also the section 'Defects Details' below, and:.

Import Data Pump parameter: TABLE_EXISTS_ACTION.

Export Data Pump parameters: FLASHBACK_SCN and FLASHBACK_TIME.

Note.786165.1 'Understanding the ESTIMATE and ESTIMATE_ONLY parameter in Export DataPump' Note:365459.1 'Parallel Capabilities of Oracle Data Pump'įor details about the Export Data Pump parameter ESTIMATE, see also: If you experience and need to resolve a Data Pump performance issue, and one or more of following parameters are used for the job, then first check the remarks below and see whether this performance problem reproduces if the parameter is not used, or used differently. In this section, the Data Pump parameters are listed that may have an impact on the performance of an Export DataPump or import DataPump job. There are also some generic database parameters (init.ora / spfile) listed that are known to have a possible impact of the Data Pump jobs.

Streams aq enqueue blocked on low memory how to#

This document will provide details about setup and configuration settings that may have an impact on the performance of the Data Pump clients will provide details how to check what Data Pump is doing at a specific moment and will discuss some known defects that have an impact on the performance. Under certain circumstances, a performance problem may be seen when unloading or loading data with the Data Pump clients. This technology is the basis for Oracle's new data movement utilities, Data Pump Export and Data Pump Import. Starting with release 10g (10.1.0), Oracle introduced the new Oracle Data Pump technology, which enables very high-speed movement of data and metadata from one database to another. For Oracle10g and higher, we recommend the usage the Data Pump to transfer data between Oracle databases. This document is only applicable to the new clients Export Data Pump (expdp) and Import Data Pump (impdp) and does not apply to the original export (exp) and import (imp) clients. The article is intended for users of the Oracle10g and Oracle11g database who use the Export Data Pump utility to export data from an Oracle source database and the Import Data Pump utility to import into an Oracle target database. Purpose: The 'undocumented' underscore parameters are parameters officially undocumented and unsupported by Oracle but that may be utilized, after receiving permission from Oracle Support to address specific issues such as bugs.This document provides information about possible causes of performance related problems when using export DataPump and Import DataPump to transfer data from an Oracle database.But did you know that the Streams Pool is not just for Streams. Set the sgatarget=0) - something I frequently do - and don’t use Streams, you probably have set the parameter streamspoolsize to 0 or not set it at all, since you reckon that the pool is used for Streams alone and therefore would be irrelevant in your environment wasting memory. If you don’t use the automatic SGA (i.e.Configuring Network Connectivity and Database Links.

Setting Initialization Parameters Relevant to Streams. This chapter contains these topics: Configuring a Streams Administrator. This chapter provides instructions for preparing a database or a distributed database environment to use Streams. EXPDP/IMPDP running slow on 11g or above / STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY' WHEN REDUCING STREAMSPOOLSIZE unresolved bug in oracle Database. To configure the Streams pool explicitly, specify the size of the pool in bytes using the streamspoolsize initialization parameter. The Streams Pool was first introduced in Oracle10g as a new area to provide a RAM buffer areas for the Streams replication. Proper sizing and effective use of the Oracle memory caches greatly improves database performance. This chapter explains how to allocate memory to Oracle memory caches, and how to use those caches.