Check whether your VPS has implemented swap
As a startup on the very tight budget. All my WordPress based websites are hosted on a VPS on Oracle Cloud free tier. It has only 1G memory and 1 CPU. In this case, having swap space is important on a VPS, especially if it has limited RAM (like 1GB), because it prevents services like MySQL or PHP from crashing when memory runs low. So when I worried about the impact of tight resource VPS to the performance of websites. I would want to check
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