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Hi, -Hi. -I encountered the problem of not being able to upgrade my instance (14->15) via pg_upgrade.
-The utility crashed with an error in out of memory.- -After researching a bit I found that this happens at the moment of export schema with
pg_dump. -Then I tried to manually perform a dump schema with the parameter --binary-upgrade option and also got an out of memory.
-Digging a little deeper, I discovered quite a large number of blob objects in the database (pg_largeobject 10GB and pg_largeobject_metadata 1GB (31kk rows)) -I was able to reproduce the problem on a clean server by simply putting some random data in pg_largeobject_metadata -$insert into pg_largeobject_metadata (select i,16390 from generate_series(107659,34274365) as i); -$pg_dump --binary-upgrade --format=custom -d mydb -s -f tmp.dmp -and after 1-2 min get out of memory ( i tried on server with 4 and 8 gb RAM) -Perhaps this is a bug? How can I perform an upgrade?
a quick and dirty solution might be an additional temporary swap space like this https://en.euro-linux.com/blog/creating-a-swap-file-or-how-to-deal-with-a-temporary-memory-shortage/ best, Anton |
