83 lines
2.3 KiB
Ruby
83 lines
2.3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'spec_helper'
|
|
|
|
RSpec.describe 'Database config initializer' do
|
|
subject do
|
|
load Rails.root.join('config/initializers/database_config.rb')
|
|
end
|
|
|
|
before do
|
|
allow(ActiveRecord::Base).to receive(:establish_connection)
|
|
end
|
|
|
|
context "when using multi-threaded runtime" do
|
|
let(:max_threads) { 8 }
|
|
|
|
before do
|
|
allow(Gitlab::Runtime).to receive(:multi_threaded?).and_return(true)
|
|
allow(Gitlab::Runtime).to receive(:max_threads).and_return(max_threads)
|
|
end
|
|
|
|
context "and no existing pool size is set" do
|
|
before do
|
|
stub_database_config(pool_size: nil)
|
|
end
|
|
|
|
it "sets it to the max number of worker threads" do
|
|
expect { subject }.to change { Gitlab::Database.config['pool'] }.from(nil).to(max_threads)
|
|
end
|
|
end
|
|
|
|
context "and the existing pool size is smaller than the max number of worker threads" do
|
|
before do
|
|
stub_database_config(pool_size: max_threads - 1)
|
|
end
|
|
|
|
it "sets it to the max number of worker threads" do
|
|
expect { subject }.to change { Gitlab::Database.config['pool'] }.by(1)
|
|
end
|
|
end
|
|
|
|
context "and the existing pool size is larger than the max number of worker threads" do
|
|
before do
|
|
stub_database_config(pool_size: max_threads + 1)
|
|
end
|
|
|
|
it "keeps the configured pool size" do
|
|
expect { subject }.not_to change { Gitlab::Database.config['pool'] }
|
|
end
|
|
end
|
|
|
|
context "when specifying headroom through an ENV variable" do
|
|
let(:headroom) { 10 }
|
|
|
|
before do
|
|
stub_database_config(pool_size: 1)
|
|
stub_env("DB_POOL_HEADROOM", headroom)
|
|
end
|
|
|
|
it "adds headroom on top of the calculated size" do
|
|
expect { subject }.to change { Gitlab::Database.config['pool'] }
|
|
.from(1)
|
|
.to(max_threads + headroom)
|
|
end
|
|
end
|
|
end
|
|
|
|
context "when using single-threaded runtime" do
|
|
it "does nothing" do
|
|
expect { subject }.not_to change { Gitlab::Database.config['pool'] }
|
|
end
|
|
end
|
|
|
|
def stub_database_config(pool_size:)
|
|
config = {
|
|
'adapter' => 'postgresql',
|
|
'host' => 'db.host.com',
|
|
'pool' => pool_size
|
|
}.compact
|
|
|
|
allow(Gitlab::Database).to receive(:config).and_return(config)
|
|
end
|
|
end
|