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Remove unused indexes 

These indexes were always listed as unused and several grow quite large.
The most significant impact is the activities_visibility_index which takes many hours to rebuild when restoring the server from backup even on fast hardware.
This commit is contained in:
Mark Felder 2023-04-22 16:14:56 +00:00
parent 3867b52aef
commit d91a823836
1 changed files with 88 additions and 0 deletions
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88
priv/repo/migrations/20230422154018_drop_unused_indexes.exs Normal file
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defmodule Pleroma.Repo.Migrations.DropUnusedIndexes do
use Ecto.Migration
@disable_ddl_transaction true
@disable_migration_lock true
def up do
drop_if_exists(
index(:activities, ["(data->>'actor')", "inserted_at desc"], name: :activities_actor_index)
)
drop_if_exists(index(:activities, ["(data->'to')"], name: :activities_to_index))
drop_if_exists(index(:activities, ["(data->'cc')"], name: :activities_cc_index))
drop_if_exists(index(:activities, ["(split_part(actor, '/', 3))"], name: :activities_hosts))
drop_if_exists(
index(:activities, ["(data->'object'->>'inReplyTo')"], name: :activities_in_reply_to)
)
drop_if_exists(
index(:activities, ["((data #> '{\"object\",\"likes\"}'))"], name: :activities_likes)
)
drop_if_exists(
index(:activities, ["activity_visibility(actor, recipients, data)", "id DESC NULLS LAST"],
name: :activities_visibility_index,
where: "data->>'type' = 'Create'"
)
)
end
def down do
create_if_not_exists(
index(:activities, ["(data->>'actor')", "inserted_at desc"],
name: :activities_actor_index,
concurrently: true
)
)
create_if_not_exists(
index(:activities, ["(data->'to')"],
name: :activities_to_index,
using: :gin,
concurrently: true
)
)
create_if_not_exists(
index(:activities, ["(data->'cc')"],
name: :activities_cc_index,
using: :gin,
concurrently: true
)
)
create_if_not_exists(
index(:activities, ["(split_part(actor, '/', 3))"],
name: :activities_hosts,
concurrently: true
)
)
create_if_not_exists(
index(:activities, ["(data->'object'->>'inReplyTo')"],
name: :activities_in_reply_to,
concurrently: true
)
)
create_if_not_exists(
index(:activities, ["((data #> '{\"object\",\"likes\"}'))"],
name: :activities_likes,
using: :gin,
concurrently: true
)
)
create_if_not_exists(
index(:activities, ["activity_visibility(actor, recipients, data)", "id DESC NULLS LAST"],
name: :activities_visibility_index,
where: "data->>'type' = 'Create'",
concurrently: true
)
)
end
end