OceanBase 数据库内 SQL 执行出现 size overflow，日志出现 thread count reach limit 的原因和解决方法

observer.log.20240830094855:[2024-08-30 09:46:56.888328] ERROR [LIB] start (thread.cpp:97) [56471][0][xxxxx-xxxxx-xxxxx-xxxxx] [lt=12] [dc=0] thread count reach limit(ret=-4019, current count=3968) BACKTRACE:0xf51231f 0x50e752f 0x5128aff 0x512873f 0x51285f8 0x50efa24 0xf3ebae1 0xf3eb747 0xf3eaf61 0xf3eac69 0xf3eb203 0xc625a72 0xc625381 0xc50a8b1 0xc50570a 0xc4eac26 0xc4ec8f7 0x4f4472f 0xb8c71f1 0x4ec9c90 0xb8c4d31 0x4ec58f6 0xb8c52a7 0xf3f17f3 0xf3f164f 0xf6901df