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done, v71 ($200/mo)įollower will become available for read-only queries when up-to-date $ heroku addons:create heroku-postgresql:standard-2 -follow HEROKU_POSTGRESQL_LAVENDER_URL -app example-appĪdding heroku-postgresql:standard-2 to example-app. In the example below the standard-2 plan is used, but you should provision the plan best suited for your needs. To begin, create a new follower for your database and wait for the follower to catch up to the leader database. This method is supported for all Heroku Postgres plans except hobby-tier plans. Performing a pg:upgrade requires app downtime on the order of 30 minutes.
#Pg postgres app rails upgrade#
If no -version flag is set, the upgrade will default to 13. You can specify the version that pg:upgrade should use with the -version flag (e.g., -version 11). You can upgrade your database to versions 10, 11, 12, 13 and 14. If you need to upgrade both the PostgreSQL version and your plan, you can provision a new follower on a different plan and perform a pg:upgrade as part of the changeover process.
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This command can only be used to upgrade a follower database, which will remain on the same plan but stop following the current leader. The pg:upgrade command uses the PostgreSQL pg_upgrade utility to upgrade your PostgreSQL version in-place. If downtime is a major consideration, then use pg:upgrade instead. Doing so removes all of the bloat from the database and saves disk space. If your database has a lot of “bloat” (extra space taken up by dead rows) and the downtime required for a pg:copy upgrade is acceptable for your app, use the pg:copy upgrade method to recreate all of the tables and indexes from scratch. If your database currently does not have checksums enabled and the downtime required for a pg:copy upgrade is acceptable for your app, use the pg:copy upgrade method to ensure that checksums are enabled as part of the upgrade. => SELECT setting = 'on' AS enabled FROM pg_settings WHERE name = 'data_checksums'
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You can check whether your database has checksums enabled by running this query in heroku pg:psql: - `t` means checksums are enabled, `f` means they are not enabled If you initially provisioned your Heroku Postgres database with a version of PostgreSQL prior to 9.3, checksums are probably not enabled for it. Postgres 9.3 introduced data checksums for early data corruption detection. Requires downtime of about 3 minutes per GB, although this can vary substantially. Works for all Heroku Postgres plans (including hobby-tier plans), but only for databases under 10GB in size. Requires downtime of about 30 minutes, although this can vary.