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Crawling: Slow crawling and slow copying between the indexer and the search nodes (FAST Search Server 2010 for SharePoint)

FAST Search Server 2010

Applies To: FAST Search 2010

Published: February 21, 2012

Issue: Crawling in SharePoint is very slow when indexing content on a multi-server FAST Search Server 2010 for SharePoint farm.

Summary: FAST Search Server 2010 for SharePoint relies on a fast and stable network connection for internal communication. This communication is secured with IPSec and it is configured during the FAST Search Server 2010 for SharePoint post-configuration. If you experience unexpected slow crawling and indexing, this article explains the probable cause and how to resolve this issue.

Symptom: Slow crawling and slow copying between the indexer and the search nodes

note Note:

The issue is typically seen in virtualized environments, but can also occur in physical environments.

Cause: The Task offload setting may be enabled on the FAST Search Server 2010 for SharePoint servers.

Resolution: Check the status of the Task offload setting and disable it if it is enabled

To check the status of the Task offload setting:

  1. On all FAST Search servers, open a command promt as an administrator, and type the following commands(s):

    For IPv4, type: “netsh int ipv4 show global”
    For IPv6, type: “netsh int ipv6 show global”
    

To disable the Task offload setting:

  1. On all FAST Search servers, open a command promt as an administrator, and type the following command:

    “netsh int ip set global taskoffload=disabled”
    

    where ip is the protocol version, either ipv4 or ipv6, where ipv4 is default

  2. Reinitialize the network adapter or restart the server.

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