do not set default_statistics_target (bsc#1022286)

[mantel]

No description provided.

[mcalmer]

Will this remove the value of the value is Set to 10? If yes, do we want to reset this always if the customer want its own value?

[mantel]

I do not know if this will remove a value that has already been set. But no longer setting it via smdba is the right thing in any case. Default value is 100 and we are setting it to 10 which is definitely too low. So IMHO the change to smdba should happen in any case. What to do with existing installations is another question.

[mantel]

I just tested on an existing installation. After removing the parameter from the postgresql.conf and restarting the service, value is set to default:

postgres@e115:~> psql
psql (9.6.3)
Type "help" for help.

postgres=# show default_statistics_target;
default_statistics_target

100
(1 row)

postgres=#

So only question left is if we need to execute an analyzer run or if this will happen automatically in the background.