为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
- 【TiDB 版本】：4.0.5
- 【问题描述】：并行执行truncate partition时，无论该分区是否存在数据，必定触发compaction，compaction reason为write-levelMaxlevelsize，同时影响集群IO；串行执行时不会出现compact。
若提问为性能优化、故障排查类问题，请下载脚本运行。终端输出的打印结果，请务必全选并复制粘贴上传。
{‘tidb_log_dir’: ‘{{ deploy_dir }}/log’, ‘dummy’: None, ‘tidb_port’: 55944, ‘tidb_status_port’: 10080, ‘tidb_cert_dir’: ‘{{ deploy_dir }}/conf/ssl’}
系统信息
+----------------+----------------------------+
| Host | Release |
+----------------+----------------------------+
| SVR27221IN5112 | 3.10.0-957.21.2.el7.x86_64 |
| SVR27220IN5112 | 3.10.0-957.21.2.el7.x86_64 |
| SVR27222IN5112 | 3.10.0-957.21.2.el7.x86_64 |
| SVR27219IN5112 | 3.10.0-957.21.2.el7.x86_64 |
| SVR27223IN5112 | 3.10.0-957.21.2.el7.x86_64 |
| SVR27225IN5112 | 3.10.0-957.21.2.el7.x86_64 |
| VMS121160 | 3.10.0-693.21.1.el7.x86_64 |
+----------------+----------------------------+
TiDB 集群信息
+--------------------+--------------+------+----+------+
| TiDB_version | Clu_replicas | TiDB | PD | TiKV |
+--------------------+--------------+------+----+------+
| 5.7.25-TiDB-v4.0.5 | 3 | 3 | 3 | 5 |
+--------------------+--------------+------+----+------+
集群节点信息
+------------+--------------+
| Node_IP | Server_info |
+------------+--------------+
| instance_0 | tikv |
| instance_1 | pd |
| instance_2 | pd+tikv+tidb |
| instance_3 | tidb |
| instance_4 | tikv |
| instance_6 | tikv |
| instance_5 | pd+tikv+tidb |
+------------+--------------+
容量 & region 数量
+---------------------+-----------------+--------------+
| Storage_capacity_GB | Storage_uesd_GB | Region_count |
+---------------------+-----------------+--------------+
| 21449.93 | 7978.22 | 1079444 |
+---------------------+-----------------+--------------+
QPS
+---------+----------------+-----------------+
| Clu_QPS | Duration_99_MS | Duration_999_MS |
+---------+----------------+-----------------+
| 832.98 | 65.83 | 472.50 |
+---------+----------------+-----------------+
热点 region 信息
+---------------+----------+-----------+
| Store | Hot_read | Hot_write |
+---------------+----------+-----------+
| store-677349 | 0 | 0 |
| store-2740360 | 9 | 5 |
| store-1446626 | 0 | 0 |
| store-1317717 | 0 | 0 |
| store-1 | 1 | 11 |
| store-5 | 2 | 12 |
| store-2740361 | 4 | 7 |
| store-1446667 | 0 | 0 |
| store-4 | 3 | 12 |
+---------------+----------+-----------+
磁盘延迟信息
+--------+------------+-------------+--------------+
| Device | Instance | Read_lat_MS | Write_lat_MS |
+--------+------------+-------------+--------------+
| dm-0 | instance_1 | nan | 0.24 |
| dm-0 | instance_5 | nan | 0.26 |
| dm-0 | instance_4 | nan | 1.31 |
| dm-0 | instance_2 | 0.00 | 1.27 |
| dm-0 | instance_0 | 0.00 | 0.51 |
| dm-0 | instance_6 | 0.00 | 0.60 |
| dm-1 | instance_1 | nan | nan |
| dm-1 | instance_5 | nan | nan |
| dm-1 | instance_4 | nan | nan |
| dm-1 | instance_2 | nan | nan |
| dm-1 | instance_0 | nan | nan |
| dm-1 | instance_6 | nan | nan |
| dm-2 | instance_1 | nan | 0.21 |
| dm-2 | instance_5 | 0.90 | 1.26 |
| dm-2 | instance_4 | 1.95 | 2.21 |
| dm-2 | instance_2 | 0.84 | 1.12 |
| dm-2 | instance_0 | 1.90 | 1.61 |
| dm-2 | instance_6 | 2.06 | 1.41 |
| dm-3 | instance_1 | nan | nan |
| dm-3 | instance_5 | nan | nan |
| dm-3 | instance_4 | nan | nan |
| dm-3 | instance_2 | nan | nan |
| dm-3 | instance_0 | nan | nan |
| dm-3 | instance_6 | nan | nan |
| md0 | instance_1 | nan | 0.00 |
| md0 | instance_5 | 0.00 | 0.00 |
| md0 | instance_4 | 0.00 | 0.00 |
| md0 | instance_2 | 0.00 | 0.00 |
| md0 | instance_0 | 0.00 | 0.00 |
| md0 | instance_6 | 0.00 | 0.00 |
| md0p1 | instance_1 | nan | nan |
| md0p1 | instance_5 | nan | nan |
| md0p1 | instance_4 | nan | nan |
| md0p1 | instance_2 | nan | nan |
| md0p1 | instance_0 | nan | nan |
| md0p1 | instance_6 | nan | nan |
| sda | instance_1 | nan | 0.19 |
| sda | instance_5 | nan | 0.21 |
| sda | instance_4 | nan | 1.27 |
| sda | instance_2 | 0.00 | 1.28 |
| sda | instance_0 | 0.00 | 0.40 |
| sda | instance_6 | 0.00 | 0.49 |
| sdb | instance_1 | nan | nan |
| sdb | instance_5 | nan | nan |
| sdb | instance_4 | nan | nan |
| sdb | instance_2 | nan | nan |
| sdb | instance_0 | nan | nan |
| sdb | instance_6 | nan | nan |
| sdc | instance_1 | nan | 0.13 |
| sdc | instance_5 | 0.92 | 1.15 |
| sdc | instance_4 | 1.94 | 1.97 |
| sdc | instance_2 | 0.92 | 1.07 |
| sdc | instance_0 | 1.82 | 1.50 |
| sdc | instance_6 | 2.01 | 1.26 |
| sdd | instance_1 | nan | 0.14 |
| sdd | instance_5 | 0.88 | 1.16 |
| sdd | instance_4 | 1.97 | 1.76 |
| sdd | instance_2 | 0.76 | 1.08 |
| sdd | instance_0 | 1.99 | 1.41 |
| sdd | instance_6 | 2.13 | 1.29 |
+--------+------------+-------------+--------------+