Re: [PROPOSAL] VACUUM Progress Checker.

Hello,
>Yes. Any percent completion calculation will have to account for the case of needing multiple passes through all the
indexes.

>Each dead tuple requires 6 bytes (IIRC) of maintenance work mem. So if you're deleting 5M rows with m_w_m=1MB you
shouldbe getting many passes through the indexes. >Studying the output of VACUUM VERBOSE will confirm that (or just
throwa temporary WARNING in the path where we start the scan). 

Yes I see the problem now. I get the message "WARNING:  Overall index percentage completion 100.000000" logged > 25
timeswhile vacuuming after 5 million records deleted. 
Figuring out number  of multiple index passes beforehand, accurately, is the problem to solve. Clearly need to study
thissome more. 
Thank you,
Sameer Thakur | Senior Software Specialist | NTTDATA Global Delivery Services Private Ltd | w. +91.20.6641.7146 | VoIP:
8834.8146| m. +91 989.016.6656 | sameer.thakur@nttdata.com | Follow us on Twitter@NTTDATAAmericas 


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