[Feature] - default_batch_fetch_size 적용

[Libienz]

✅ 작업 내용

• default_batch_fetch_size를 100으로 설정

🙈 참고 사항

현재 JPA 연관관계로 인해 데이터를 가져올 때 SELECT한 row 수 만큼 추가 쿼리가 발생하는 N+1문제가 발생합니다.
연관된 객체를 가져올 때 batch_size만큼 가져오도록 설정하여 N+1문제를 완화할 수 있습니다.
default_batch_fetch_size를 적용하여 한번에 100개씩 IN절을 활용하여 가져오도록 최적화 되었습니다.

성능 측정

26.83프로 성능 개선 달성

Jmeter 테스트 시나리오

• 조회 대상 여행기: 2박 3일 여행기 (각 날짜는 3개의 장소 지정)
• thread: 100
• duration: 120sec

batch_fetch_size 미지정

• avg: 41

batch_fetch_size 100 설정

• avg: 30

발생 쿼리 비교

발생 쿼리 비교

batch_fetch_size 미지정

Hibernate: 
    select
        t1_0.id,
        t1_0.author_id,
        t1_0.created_at,
        t1_0.deleted_at,
        t1_0.like_count,
        t1_0.modified_at,
        t1_0.thumbnail,
        t1_0.title 
    from
        travelogue t1_0 
    where
        t1_0.id=? 
        and (
            t1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tt1_0.id,
        tt1_0.tag_id,
        tt1_0.travelogue_id 
    from
        travelogue_tag tt1_0 
    where
        tt1_0.travelogue_id=?
Hibernate: 
    select
        m1_0.id,
        m1_0.created_at,
        m1_0.deleted_at,
        m1_0.email,
        m1_0.kakao_id,
        m1_0.login_type,
        m1_0.modified_at,
        m1_0.nickname,
        m1_0.password,
        m1_0.profile_image_url 
    from
        member m1_0 
    where
        m1_0.id=?
Hibernate: 
    select
        td1_0.travelogue_id,
        td1_0.id,
        td1_0.created_at,
        td1_0.deleted_at,
        td1_0.modified_at,
        td1_0.day_order 
    from
        travelogue_day td1_0 
    where
        td1_0.travelogue_id=? 
        and (
            td1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_day_id,
        tp1_0.id,
        tp1_0.country_code,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.description,
        tp1_0.modified_at,
        tp1_0.name,
        tp1_0.place_order,
        tp1_0.place_id,
        tp1_0.latitude,
        tp1_0.longitude 
    from
        travelogue_place tp1_0 
    where
        tp1_0.travelogue_day_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_day_id,
        tp1_0.id,
        tp1_0.country_code,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.description,
        tp1_0.modified_at,
        tp1_0.name,
        tp1_0.place_order,
        tp1_0.place_id,
        tp1_0.latitude,
        tp1_0.longitude 
    from
        travelogue_place tp1_0 
    where
        tp1_0.travelogue_day_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_day_id,
        tp1_0.id,
        tp1_0.country_code,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.description,
        tp1_0.modified_at,
        tp1_0.name,
        tp1_0.place_order,
        tp1_0.place_id,
        tp1_0.latitude,
        tp1_0.longitude 
    from
        travelogue_place tp1_0 
    where
        tp1_0.travelogue_day_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id=? 
        and (
            tp1_0.deleted_at IS NULL
        )

batch_fetch_size 지정

Hibernate: 
    select
        t1_0.id,
        t1_0.author_id,
        t1_0.created_at,
        t1_0.deleted_at,
        t1_0.like_count,
        t1_0.modified_at,
        t1_0.thumbnail,
        t1_0.title 
    from
        travelogue t1_0 
    where
        t1_0.id=? 
        and (
            t1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tt1_0.id,
        tt1_0.tag_id,
        tt1_0.travelogue_id 
    from
        travelogue_tag tt1_0 
    where
        tt1_0.travelogue_id=?
Hibernate: 
    select
        m1_0.id,
        m1_0.created_at,
        m1_0.deleted_at,
        m1_0.email,
        m1_0.kakao_id,
        m1_0.login_type,
        m1_0.modified_at,
        m1_0.nickname,
        m1_0.password,
        m1_0.profile_image_url 
    from
        member m1_0 
    where
        m1_0.id=?
Hibernate: 
    select
        td1_0.travelogue_id,
        td1_0.id,
        td1_0.created_at,
        td1_0.deleted_at,
        td1_0.modified_at,
        td1_0.day_order 
    from
        travelogue_day td1_0 
    where
        td1_0.travelogue_id=? 
        and (
            td1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_day_id,
        tp1_0.id,
        tp1_0.country_code,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.description,
        tp1_0.modified_at,
        tp1_0.name,
        tp1_0.place_order,
        tp1_0.place_id,
        tp1_0.latitude,
        tp1_0.longitude 
    from
        travelogue_place tp1_0 
    where
        tp1_0.travelogue_day_id in (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) 
        and (
            tp1_0.deleted_at IS NULL
        )
Hibernate: 
    select
        tp1_0.travelogue_place_id,
        tp1_0.id,
        tp1_0.created_at,
        tp1_0.deleted_at,
        tp1_0.photo_key,
        tp1_0.modified_at,
        tp1_0.photo_order 
    from
        travelogue_photo tp1_0 
    where
        tp1_0.travelogue_place_id in (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) 
        and (
            tp1_0.deleted_at IS NULL
        )

[github-actions]

Test Results

 31 files   31 suites   57s ⏱️
312 tests 311 ✅ 1 💤 0 ❌
324 runs  323 ✅ 1 💤 0 ❌

Results for commit 35c7b73.

[eunjungL]

테스트와 일반 application.yml 파일에 배치 사이즈 적용한 거 확인했습니다~
수고하셨습니다 리비!