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OceanBase 数据库 V4.x 环境 OSS 介质，日志备份延迟的原因及解决方法

更新时间：2026-05-11 09:51

适用版本：V4.0.x、V4.1.x、V4.2.x、V4.3.x内容类型：Troubleshoot

问题现象

日志备份延迟，延迟时间没有增大，也没有卡住，持续慢 9000s 左右。

关键日志信息。

observer.log.20240621235426622:[2024-06-21 23:53:44.509070] INFO  [ARCHIVE] statistic (ob_archive_sender.cpp:893) [38511][T1002_ArcSender][T1002][xxxxx-xxxxx-xxxxx-xxxxx] [lt=3] archive_sender statistic in 10s(total_send_log    _size=67104768, total_send_buf_size=67104768, total_send_task_count=1, total_send_cost_ts=101465891, avg_task_lsn_size=67104768, avg_task_buf_size=67104768, avg_task_cost_ts=101465891)^M
161 observer.log.20240621235426622:[2024-06-21 23:53:50.058977] INFO  [ARCHIVE] statistic (ob_archive_sender.cpp:893) [11739][T1002_ArcSender][T1002][xxxxx-xxxxx-xxxxx-xxxxx] [lt=4] archive_sender statistic in 10s(total_send_log    _size=67104768, total_send_buf_size=67104768, total_send_task_count=1, total_send_cost_ts=107027870, avg_task_lsn_size=67104768, avg_task_buf_size=67104768, avg_task_cost_ts=107027870)^M
162 observer.log.20240621235426622:[2024-06-21 23:54:20.397020] INFO  [ARCHIVE] statistic (ob_archive_sender.cpp:893) [38512][T1002_ArcSender][T1002][xxxxx-xxxxx-xxxxx-xxxxx] [lt=3] archive_sender statistic in 10s(total_send_log    _size=67104768, total_send_buf_size=67104768, total_send_task_count=1, total_send_cost_ts=102816716, avg_task_lsn_size=67104768, avg_task_buf_size=67104768, avg_task_cost_ts=102816716)^M

上述日志表示 10s 大概往 OSS 写了 67 MB 数据，相当于 6.7MB/s。但平均任务处理时间 avg_task_cost_ts= 100s 左右，OSS 带宽或 OSS 写入侧有问题，需要 OSS 侧排查问题。