to crawl only one site collection which opton we should choose

sns 9,226 Reputation points
2021-03-29T05:44:27.257+00:00

Please let me know how to crawl only one site collection? from below screenshot which option I should choose?

second question:
I intiated full crawl for local sharepoint content sources 25 hours ago still crawl is going on..why so much delay? farm is only one server which has 395 site collection all together. it is lab farm.

Please help 82090-crawl.jpg

is there any way to run only one site collection with powershell command?
82263-crawllogs2.jpg82179-crawllog1.jpg

SharePoint Server Management
SharePoint Server Management
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Trevor Seward 11,681 Reputation points
    2021-03-29T15:33:51.297+00:00

    Generally you should not perform Full Crawls at all, except as a troubleshooting step or if modifying Managed Properties at the SSA level -- modifying them at the Site Collection level is preferred.

    You can reindex just a single site by going to the Site Collection -> Site Settings -> Search and Offline Availability (/_layouts/15/srchvis.aspx), then click reindex site.

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  2. JoyZ 18,041 Reputation points
    2021-03-30T05:52:40.613+00:00

    Hi @sns ,

    You can check for warnings and errors in the crawl log to check if the file exceeds the search limit, which can affect performance.

    We could also go to Central Administration> Search Service Application> in the Diagnostics section, click Crawl Health Reports to check Crawl Rate,Crawl Latency, CPU and Memory Load and so on.

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    To improve crawl performance, you can do the following:

    Slow response time from crawled servers >>Provide more CPU and RAM and faster disk I/O
    Low network bandwidth >>Install one or two one-gigabit-per-second network adapters on each crawl server
    Content processing >>Provide more content processing components, and more CPU resources for each content processing component
    Slow processing by the index components >>Add I/O resources for servers that host index components

    If you want to crawl only one site collection, create a new content source, choose SharePoint Sites type, select "only crawl the site collection of each start address", then type the site collection url in start address(first remove this site from other content source), then run full crawl for the new content source.

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