Enterprise Root Cause Analysis & System Tracing | TechnicalSupport.ie
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Root Cause
Analysis

When the logs are silent, we dig deeper. We do not guess at the source of a crash or bottleneck; we utilise low-level system tracing to map the exact execution path and isolate the failure point.

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root@rescue:~# strace -c -p $(pgrep -n php-fpm)
strace: Process 14234 attached
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Our Diagnostic Toolchain

strace tcpdump lsof Wireshark kdump valgrind gdb

root@server:~# dmesg | tail

Diagnostic Methodology

We dissect complex application failures by analysing the lowest levels of the operating system. We map the exact interactions between your code, the kernel, and the hardware.

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System Call Tracing

Using strace and ptrace, we intercept and record the system calls called by a process. This reveals exactly where an application is hanging, what files it is failing to open, or which system resource it is waiting for.

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Network Packet Analysis

We deploy tcpdump to capture raw network packets directly at the interface level. We then analyse these pcaps via Wireshark to identify dropped TCP handshakes, TLS negotiation failures, or hidden network latency.

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File Descriptor Leaks

"Too many open files" is a classic application killer. We utilise lsof to map exactly which processes are leaking descriptors, draining sockets, or holding locked files hostage.

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Kernel Crash Dumps

When the entire server crashes, logs are often lost. We configure kdump to capture the kernel's memory state at the exact moment of a panic, allowing us to forensically analyse hardware faults or bad kernel modules post-mortem.

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Database Deadlock Profiling

We dive into the InnoDB engine status and slow query logs to unpick complex MySQL/PostgreSQL transactional deadlocks that are causing your web application to freeze silently under load.

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OOM Killer Forensics

If the Out-Of-Memory killer terminates your database, we trace the memory allocation history to find the exact application process or cron job that caused the memory spike in the first place.

support_agent Incident Response Teams

RCA & Response Tiers

From diagnosing past crashes to immediate, live intervention on critical production clusters.

Post-Mortem Audit

A one-off, forensic analysis of a recent crash or outage to prevent future recurrences.

€350/incident
  • check Log Aggregation & Analysis
  • check OOM & Kernel Panic Review
  • check Database Crash Forensics
  • check Comprehensive RCA Report
  • close No Live Intervention SLA
Request Audit
Emergency Response

Active Intervention

Immediate, live debugging and remediation for an ongoing critical production outage.

€180/hour
  • check Includes Post-Mortem Audit
  • check Live System Call Tracing (strace)
  • check Live Network Packet Analysis
  • check Immediate Service Remediation
  • check Priority Engineer Assignment
Engage Engineer

Priority Retainer

Guaranteed availability and pre-approved access for mission-critical enterprise environments.

Custom SLA
  • check Guaranteed 15-Min Response SLA
  • check Pre-configured VPN/SSH Access
  • check Dedicated Lead Systems Engineer
  • check Continuous Architecture Reviews
  • check Monthly Threat/Stability Briefings
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help_outline Diagnostic Inquiries

Incident Response FAQ

Common questions regarding our debugging process, access requirements, and forensic capabilities.

Do you require root access to perform diagnostics? expand_more
Yes. Advanced tracing tools like strace, tcpdump, and examining raw kernel logs require root (or heavy sudo) privileges. We ensure all connections are made securely via SSH keys and we recommend disabling our access immediately following the resolution of the incident.
Can you find out why our server crashed last night? expand_more
In most cases, yes. We conduct a Post-Mortem Audit by reviewing historical syslog, journalctl, dmesg, and previous sar/sysstat data. However, if the crash resulted in a hard freeze without writing to disk, we may need to configure kdump to catch the precise failure point if it occurs again.
Is RCA a substitute for monitoring? expand_more
No. Proactive monitoring (like Prometheus or Zabbix) alerts you *when* an anomaly is occurring. Root Cause Analysis is the deep, manual engineering work required to determine *why* it happened and how to permanently re-architect the system to fix it.
How long does an active investigation typically take? expand_more
While it varies heavily depending on the complexity of the architecture and whether the issue is currently reproducible, our engineers generally isolate the root cause and provide a remediation strategy within 4 to 8 billable hours for standard LAMP/LEMP stacks.
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