For bureaucratic reasons, a colleague of mine had to print, sign, scan and send by email a high number of pages. To save trees, ink, time, and to stick it...
Probably the only valid reason for using
set enable_seqscan=false
is when you're writing queries and want to quickly see what the query plan would actually be were there large amounts of data in the table(s).
E. Rukzio, K. Leichtenstern, и V. Callaghan. 8th International Conference on Ubiquitous Computing, UbiComp 2006, Orange County, California, (сентября 2006)