On 12/12/2018 04:37 PM, Ravi Krishna wrote:
I am running explain analyze cost on a SQL which reads from two large
tables (122mil and 37 mil). The query is an UPDATE SQL where we use
derives table in the from clause and then join it back to the table being
updated.
The explain analyze cost itself is taking forever to run. It is running
for the last 1 hr. Does that actually run the SQL to find out the impact
of I/O (as indicated in COSTS).
Yes.
https://www.postgresql.org/docs/9.6/sql-explain.html
"The ANALYZE option causes the statement to be actually executed, not only
planned."
If not, what can cause it to run this slow.
--
Angular momentum makes the world go 'round.
