SharePoint Crawl DB size increasing @20GB per day

Recently, one of my SharePoint farms faced an issue where the volume utilization of DB server (SharePoint crawl database) went upto 99% within 10 days.

Analysis:
– Looking at the crawl DB log in SharePoint, the incremental crawl was running every 1.5 hours with 0 success and 100% failures.

– There were about 961K errors with each incremental crawl scheduled at every 2 hours.

– There is a temporary folder that Crawl uses to place files temporarily on the server. The path is C:\Users\”SPAdminAccount”\AppData\Local\Temp\gthrsvc_OSearch14\

– I found out that this temporary folder was somehow missing / deleted.

Solution:

On creating the above mentioned folder manually, the success rate of crawl went high and there were very less failures (as expected)

Post this, the space utilization went about 10 MB a day which is expected during crawl.

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