Is it worth increasing the I/O buffer size реr worker?

[gityhubi]

As far as I understand, this setting is for the RAM buffer? Does increasing the buffer size reduce the load on the disk?

[junaid2005p]

yes this setting is for the RAM buffer. A higher buffer size will reduce syscalls as surge downloads into buffers from a pool of buffers and then writes the buffer into the disk using syscalls.
yes increasing the buffer size reduces the load on the disk but only up to an extent.

because if you keep increasing the buffer size then you are allotting more and more part of your RAM to surge buffers, something which you can use for other prgrams

Also the difference between using a 512KB buffer and a 1024KB buffer is not very signficant
Scenario A:
You want to write 2048KB and you are using 512KB buffers
total write calls around 2048/512 = 4

Scenario B:
You want to write 2048KB and you are using 1024KB buffers
total write calls around 2048/512 = 2

Scenario C:
You want to write 2048KB and you are using 8KB buffers
total write calls around 2048/8 = 256

As you can see diff between using a 8KB buffer(very small) and a 512KB buffer(medium) is significant

A value of 512KB or 1024KB is reasonable for fast download managers

Let me know if you have any more questions :)