How to estimate the shared memory size required for parallel scan?

From: Masayuki Takahashi <masayuki038(at)gmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: How to estimate the shared memory size required for parallel scan?
Date: 2018-08-16 11:36:31
Message-ID: CA+z6ocRFEnThhXye3F9_ZjSMDSfOGdnGOt8hnXsVgGmFpNTYFA@mail.gmail.com
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Hi,

I am trying to change cstore_fdw to scan in parallel. FDW interface provide
'EstimateDSMForeignScan' for required shared memory size to scan in parallel.

How to estimate the shared memory size required for parallel scan?

thanks.
--
Masayuki Takahashi

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