Following performance limits apply on Linux Retail Hosting Plans (prefixed with GB- ) :

Plans < GB-6 - will have 1 vCPU, 1 GB RAM, 1 MB/s IO, 1024 IOPS, 20 EP
Plans >= GB-6 and < GB-10 - will have 1 vCPU, 1 GB RAM, 2 MB/s IP, 2048 IOPS, 20 EP
Plans >= GB-10 and < GB-15 - will have 1 vCPU, 1 GB RAM, 4 MB/s IP, 4096 IOPS, 20 EP
Plans >= GB-15 and < GB-20 - will have 1 vCPU, 1 GB RAM, 6 MB/s IP, 6144 IOPS, 30 EP
Plans >= GB-20 - will have 2 vCPU, 2 GB RAM, 6 MB/s IP, 6144 IOPS, 40 EP

IO - Input/Output, IOPS - No. of Input/Output operations per second, EP - Entry Processes

Any GB- prefix plans on our mail-only server/VPS and/or any other non GB- prefixed plans, have these limits : 1 vCPU, 1 GB RAM, 1 MB/s IO, 1024 IOPS, 20 EP

The limits on a particular account can be reduced/changed in-case its operation is detrimental to the server's/VPS's performance

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W.r.t. Linux Reseller Hosting plans, a reseller can buy a unit which can be applied to a cPanel under their WHM as under

IO limit - 2 MB/s unit - Rs.1200+GST per year
IO limit - 4 MB/s unit - Rs.3600+GST per year
IO limit - 6 MB/s unit - Rs.6000+GST per year
IOPS limit - 2048 unit - Rs.1200+GST per year
IOPS limit - 4096 unit - Rs.3600+GST per year
IOPS limit - 6144 unit - Rs.6000+GST per year
RAM limit - 2 GB unit - Rs.2400+GST per year
vCPU limit - 2 - Rs.2400+GST per year