Skip to content

throttle-high-io-process.md

Latest commit

 

History

History
34 lines (22 loc) · 1.05 KB

throttle-high-io-process.md

File metadata and controls

34 lines (22 loc) · 1.05 KB

Throttle High I/O Process

Company: Ebay | Difficulty: Easy

Scenario

A server is experiencing latency spikes and intermittent timeouts. CPU and memory appear normal, suggesting a disk I/O bottleneck from a runaway process.

Task

Identify the process causing high disk I/O using real-time monitoring, then apply I/O throttling to reduce its disk priority to idle class without terminating it.

Example

# Before (high I/O process)

Total DISK READ:       125.43 M/s | Total DISK WRITE:        89.32 M/s
  TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND
 5432 be/4 postgres   98.45 M/s   67.23 M/s  0.00 %  95.32 % postgres: autovacuum worker

# After (I/O throttled)

Total DISK READ:        12.34 M/s | Total DISK WRITE:         8.92 M/s
  TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND
 5432 idle postgres    9.12 M/s    6.45 M/s  0.00 %  12.34 % postgres: autovacuum worker

📹 Video Solution