为了更快的定位您的问题，请提供以下信息，谢谢
【详述】问题详细描述
2.5.3升级3.0.8时，操作升级第一台 be 时，be 磁盘io 100%
be.WARNING 刷屏报错
W1219 15:59:08.051925 88874 compaction_manager.cpp:100] submit compaction task 203518 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051932 88874 compaction_manager.cpp:100] submit compaction task 203519 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051940 88874 compaction_manager.cpp:100] submit compaction task 203520 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051949 88874 compaction_manager.cpp:100] submit compaction task 203521 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051964 88874 compaction_manager.cpp:100] submit compaction task 203522 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051977 88874 compaction_manager.cpp:100] submit compaction task 203523 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051986 88874 compaction_manager.cpp:100] submit compaction task 203524 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.051995 88874 compaction_manager.cpp:100] submit compaction task 203525 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
W1219 15:59:08.052006 88874 compaction_manager.cpp:100] submit compaction task 203526 to compaction pool failed. status:Service unavailable: Thread pool is at capacity (48/48 tasks running, 1000/1000 tasks queued)
【背景】做过哪些操作？
be.conf 在2.5.3时，有些参数设置
cumulative_compaction_num_threads_per_disk=6
base_compaction_num_threads_per_disk = 2
cumulative_compaction_check_interval_seconds = 2
tablet_max_versions=20000
base_compaction_interval_seconds_since_last_operation=43200
trash_file_expire_time_sec=3600
thrift_client_retry_interval_ms=200
alter_tablet_worker_count=6
streaming_load_max_batch_size_mb=1000
clone_worker_count=24
【业务影响】
【是否存算分离】 否
【StarRocks版本】 2.5.3 升级 3.0.8过程中
【集群规模】3fe（1 follower+2observer）+3be（fe与be混部）
【机器信息】CPU虚拟核/内存/网卡，64C/320G/万兆
【联系方式】社区群2-巡山的大王大人