Noisy neighbors on a shared server
Posted: Sat Oct 31, 2026 2:13 pm
Noisy neighbors on a shared server
A cheap VPS shares physical hardware with other customers. If one neighbor runs something heavy, the others can feel it. The effect is called the noisy neighbor problem.
The symptom is variable performance. For an hour, everything runs smoothly. Then the platform lags, orders take longer, and CPU metrics show spikes that no process on the machine explains.
Providers differ in how they allocate resources. Some guarantee a share of CPU and memory. Others oversubscribe, selling more capacity than exists, on the assumption that not everyone uses it at once.
A metric called CPU steal time reveals the problem on Linux, and some Windows monitoring tools show something similar. It measures how much time the virtual machine wanted to run but had to wait.
For latency-sensitive trading, reliability matters more than peak speed. A dedicated or reserved-resource plan costs more but delivers steadier timing.
Testing helps: record the response time of a simple benchmark every minute for a day. A stable line is good. A line with random spikes is a warning.
Over a day, what does the VPS performance log look like, and are there spikes with no explanation?
A cheap VPS shares physical hardware with other customers. If one neighbor runs something heavy, the others can feel it. The effect is called the noisy neighbor problem.
The symptom is variable performance. For an hour, everything runs smoothly. Then the platform lags, orders take longer, and CPU metrics show spikes that no process on the machine explains.
Providers differ in how they allocate resources. Some guarantee a share of CPU and memory. Others oversubscribe, selling more capacity than exists, on the assumption that not everyone uses it at once.
A metric called CPU steal time reveals the problem on Linux, and some Windows monitoring tools show something similar. It measures how much time the virtual machine wanted to run but had to wait.
For latency-sensitive trading, reliability matters more than peak speed. A dedicated or reserved-resource plan costs more but delivers steadier timing.
Testing helps: record the response time of a simple benchmark every minute for a day. A stable line is good. A line with random spikes is a warning.
Over a day, what does the VPS performance log look like, and are there spikes with no explanation?