Number of servers requested: 1
Service: Varnish cache proxy
Memory: 2 GB
Disk: 40 GB
Network: IPv4 & IPv6
Justification for request:
Load alerts have been firing for UK cache proxies recently, causing user visible issues. These issues are almost certainly caused by high disk I/O:
cp12 (Canada) is a £4.80/mo (incl VAT) 1 vCPU/2 GB RAM/40 GB NVMe SSD/250 Mbps unmetered VPS from OVHcloud UK. On average (last 24h), cp12 handles 134 frontend requests per second, compared to cp10's (1 out of 2 UK cp's) 39. 15m load average (last 24h) is 0.91 on cp12, compared to cp10's 2.54. cp12 has an average (last 24h) 683 read io/s, compared to cp10's 140 io/s.
Not only will the cache proxies benefit from better disk I/O performance due to the SSDs, other VMs on cloud4 and cloud5 will be able to benefit from reduced I/O on the cloud hosts.
Plan: replace cp10 and cp11 with one cache proxy in OVHcloud UK.
Endorsement by Engineering Manager (MediaWiki) or Site Reliability Engineer: @Paladox