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    Object Storage Service:What do I do if a delay exists when I upload objects to or download objects from OSS in the CloudMonitor console?

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    Object Storage Service:What do I do if a delay exists when I upload objects to or download objects from OSS in the CloudMonitor console?

    Last Updated:Mar 20, 2026

    The latency shown in the CloudMonitor console reflects data from CloudMonitor's probe requests, not your actual user traffic. This is expected behavior caused by how Object Storage Service (OSS) and CloudMonitor work together.

    Cause

    OSS and CloudMonitor are independent Alibaba Cloud services. OSS pushes data to CloudMonitor for analysis, but this pipeline has an inherent delay of 2–3 hours. OSS must also send data within a 5-minute window — if it misses that window, CloudMonitor permanently rejects the data and OSS cannot resend it. As a result, gaps or anomalies in the monitoring view do not necessarily indicate a real access problem.

    Troubleshoot real access delays

    If CloudMonitor shows high access latency and you want to confirm whether your users are experiencing actual slow uploads or downloads, follow these steps:

    1. Check whether a delay exists when clients access OSS resources directly.

    2. If clients are experiencing delays, capture network packets to analyze traffic for the affected bucket.

    3. Analyze OSS access logs to confirm whether a delay exists.

    4. If the issue persists, see What do I do if the speed is slow when I upload objects to or download objects from OSS? for further troubleshooting.