loftar wrote:WaitWhat4355 wrote:If it's over 75% of the capacity it shows
Is that a somewhat firm statement? Are you saying that I should effectively reserve 128 GB of unused space on them?
I'd imagine this was more or less the starting point of when SSDs started slowing down to a barely noticeable degree, but as it went further over it'd become more and more noticeable, on the smaller drives at least. This was how it was for SSDs from a few years ago, so they might've changed it for more recent ones.
loftar wrote:WaitWhat4355 wrote:How full are they right now?
Well, the space that is used is pretty much 100% used since, as mentioned previously in the thread, they're being used for bcache.
Bcache is where it stores the most frequently used files from the HDD for faster access and puts the files sent for storage before being flushed to the HDD, right? Do you know if it it forces all data sent to storage through it, or sometimes lets it bypass directly to HDD if needed? If it's trying to make everything go through the bcache SSDs as the only inlet to the storage and they are at a constant 100% with 32GB only for overprovision, then it could be that the SSDs are currently too slow at moving things around in them with the lack of space and overhead.
loftar wrote:WaitWhat4355 wrote:From what I know, most SSDs already have some over provisioning that you can't touch but how much it is varies from manufacturer to manufacturer.
I don't believe these ones have any of that.
I thought all SSDs had this, and HDDs included? Though, HDDs had a much smaller % of overprovisioning due to how it had only small blocks on the disk, could be moved anywhere, and had indefinite rewrites. SSD manufacturers never actually tell you how much is over provisioned.