Tag: BPF/bcc

  • Troubleshoot I/O & Wait Latency with OraLatencyMap and PyLatencyMap

    Troubleshoot I/O & Wait Latency with OraLatencyMap and PyLatencyMap

    Troubleshoot I/O & Wait Latency with OraLatencyMap and PyLatencyMap I recently chased an Oracle performance issue where most reads were sub-millisecond (cache), but a thin band around ~10 ms (spindles) dominated total wait time. Classic bimodal latency: the fast band looked fine in averages, yet the rare slow band owned the delay. To investigate, and

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  • Linux BPF/bcc for Oracle Tracing

    Linux BPF/bcc for Oracle Tracing

    Linux BPF/bcc for Oracle Tracing Topic: In this post you will find a short discussion and pointers to the code of a few sample scripts that I have written using Linux BPF/bcc and uprobes for Oracle tracing. Previous work and motivations Tools for dynamic tracing are very useful for troubleshooting and internals investigations of Oracle

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