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PASSEDqueue / disk_io_contention
ZeroMQ 4.3 High Disk IO Wait — Performance Degraded on Fedora 40 Server
ZeroMQ 4.3 performance is severely degraded due to disk I/O contention from another process on the same host.
Pattern
STORAGE_IO_LATENCY
Severity
HIGH
Confidence
64%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | STORAGE_IO_LATENCY | STORAGE_IO_LATENCY | |
| Severity Assessment | HIGH | HIGH | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
Fedora 40 Server. ZeroMQ 4.3 disk i/o wait at 91%. Another process running heavy sequential writes. Read latency 772ms (normal: 2ms).
Injected Error Messages (1)
ZeroMQ 4.3 disk i/o contention on Fedora 40 Server — storage latency critical, read latency 772ms (normal 2ms), disk i/o wait 91%, zeromq performance severely impacted
Neural Engine Root Cause Analysis
Storage I/O latency detected — disk operations are taking significantly longer than normal, causing application slowdowns, database query timeouts, and degraded user experience. High iowait indicates the CPU is spending excessive time waiting for disk operations to complete, often due to disk contention, failing drives, or storage subsystem overload.
Remediation Plan
1. Check I/O statistics with 'iostat -x 1 5' to identify which disk is bottlenecked.
2. Review iowait percentage in 'top' or 'vmstat' — sustained values above 20% indicate a problem.
3. Look for processes generating excessive I/O with 'iotop' or 'pidstat -d'.
4. Check RAID array health and disk SMART data for signs of drive failure.
5. Consider migrating to faster storage (SSD/NVMe) or offloading heavy I/O workloads.
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnwkfp05imlijgqcue9c51