Squashed commit of the following:

commit 541a2900410aab793c25d65846bbe88f9208bb17
Merge: ede49bb a8f524b
Author: Yiding Cui <winoros@gmail.com>
Date:   Sun Aug 28 23:25:32 2022 +0800

    Merge branch 'master' into analyze-concurrency-hotfix

commit ede49bb
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Fri Aug 26 17:07:11 2022 +0800

    fix

commit 9cbd94b
Merge: 41b4c4a b5cbba8
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Fri Aug 26 15:10:24 2022 +0800

    Merge branch 'analyze-concurrency-hotfix' of github.com:chrysan/tidb into analyze-concurrency-hotfix

commit 41b4c4a
Merge: 864bb66 b99aebe
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Fri Aug 26 14:40:16 2022 +0800

    Merge remote-tracking branch 'pingcap/master' into analyze-concurrency-hotfix

commit 864bb66
Merge: 77d372a 21847fe
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Mon Aug 22 23:47:45 2022 +0800

    Merge remote-tracking branch 'pingcap/master' into analyze-concurrency-hotfix

commit 77d372a
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Mon Aug 22 23:45:43 2022 +0800

    make auto-analyze concurrency configurable

commit 3d5577b
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Fri Aug 19 11:58:22 2022 +0800

    Revert "do not limit auto-analyze concurrency too aggressively"

    This reverts commit f1c4198.

commit b5cbba8
Merge: f1c4198 39e00eb
Author: Weizhen Wang <wangweizhen@pingcap.com>
Date:   Mon Aug 15 22:54:04 2022 +0800

    Merge branch 'master' into analyze-concurrency-hotfix

commit f1c4198
Author: wuxiaoju <wuxiaoju@pingcap.com>
Date:   Fri Aug 12 20:11:32 2022 +0800

    do not limit auto-analyze concurrency too aggressively