Extremely slow read speed while put speed is fine on Debian Machine

[realsirjoe]

Hi there I am currently testing if pogreb fits my needs and am very impressed by its speed however I recently ran some benchmarks ( pogreb-benchmark ) on a Debian Server
./pogreb-bench -n 10_000_000 -p ./pogreb_test/
and am experiencing extremely slow read speed

put: 503.882s 19845 ops/s
I don't have a full duration for read speed since it would take too long to finish but it read about 630000 in 1500s

I also made same test on Macbook where everything works great
Any idea how this is possible? What can I do to pinpoint the issue?

Edit:
I tried it without mmap:
put: 65.852s 151855 ops/s
get: 25.389s 393876 ops/s

However the issue persists at n=100_000_000

Any idea why this is faster

Thanks a lot!

[akrylysov]

Thanks for the report! How much RAM does the Debian Server have vs the MacBook?

[realsirjoe]

Server: 8GB
MacBook 16GB

is there some way I can speed it up?