I do NOT have SSD. I have normal HDD group by JBOD. My CF have SizeTieredCompactionStrategy I am using local quorum for reads and writes. To be precise I have a lot of writes and almost 0 reads. I changed "cold_reads_to_omit" to 0.0 as someone suggest me. I used set compactionthrouput to 999.
So if my disk are idle, my CPU is less then 40%, I have some free RAM - why SSTables count is growing? How I can speed up compactions? On Wed, Feb 25, 2015 at 5:16 PM, Nate McCall <n...@thelastpickle.com> wrote: > > >> If You could be so kind and validate above and give me an answer is my >> disk are real problems or not? And give me a tip what should I do with >> above cluster? Maybe I have misconfiguration? >> >> >> > You disks are effectively idle. What consistency level are you using for > reads and writes? > > Actually, 'await' is sort of weirdly high for idle SSDs. Check your > interrupt mappings (cat /proc/interrupts) and make sure the interrupts are > not being stacked on a single CPU. > > >
