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perf: add pghero and implement pghero suggestions. Remove unneeded indexes

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This commit is contained in:
Nelson Jovel 2023-12-27 10:54:32 -08:00
parent edbb84334a
commit 978942ab34
5 changed files with 29 additions and 5 deletions
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8
db/migrate/20231227183313_remove_unneeded_indexes.rb Normal file
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@ -0,0 +1,8 @@
class RemoveUnneededIndexes < ActiveRecord::Migration[7.1]
def change
remove_index :student_races, name: "index_student_races_on_student_id", column: :student_id
remove_index :survey_item_responses, name: "index_survey_item_responses_on_school_id", column: :school_id
remove_index :survey_item_responses, name: "index_survey_item_responses_on_school_id_and_academic_year_id",
column: %i[school_id academic_year_id]
end
end

5
db/schema.rb
View file

@ -10,7 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema[7.1].define(version: 2023_10_04_211430) do
ActiveRecord::Schema[7.1].define(version: 2023_12_27_183313) do
# These are extensions that must be enabled in order to support this database
enable_extension "pg_stat_statements"
enable_extension "plpgsql"
@ -421,7 +421,6 @@ ActiveRecord::Schema[7.1].define(version: 2023_10_04_211430) do
t.datetime "updated_at", null: false
t.index ["race_id"], name: "index_student_races_on_race_id"
t.index ["student_id", "race_id"], name: "index_student_races_on_student_id_and_race_id"
t.index ["student_id"], name: "index_student_races_on_student_id"
end
create_table "students", force: :cascade do |t|
@ -463,9 +462,7 @@ ActiveRecord::Schema[7.1].define(version: 2023_10_04_211430) do
t.index ["income_id"], name: "index_survey_item_responses_on_income_id"
t.index ["response_id"], name: "index_survey_item_responses_on_response_id"
t.index ["school_id", "academic_year_id", "survey_item_id"], name: "by_school_year_and_survey_item"
t.index ["school_id", "academic_year_id"], name: "index_survey_item_responses_on_school_id_and_academic_year_id"
t.index ["school_id", "survey_item_id", "academic_year_id", "grade"], name: "index_survey_responses_on_grade"
t.index ["school_id"], name: "index_survey_item_responses_on_school_id"
t.index ["sped_id"], name: "index_survey_item_responses_on_sped_id"
t.index ["student_id"], name: "index_survey_item_responses_on_student_id"
t.index ["survey_item_id"], name: "index_survey_item_responses_on_survey_item_id"