--On Thursday, October 7, 2021 6:44 PM +0100 Howard Chu <[email protected]>
wrote:
Jürgen Baier wrote:
Hi,
I'm using LMDB for mapping MD5 hash codes to some data. I noticed that a
virtualized environment (Xen/Windows on our own servers and AWS/Windows)
slows down LMDB significantly (e.g. a certain workload is executed in 30
minutes on a local machine vs. 15 hours on AWS).
Sounds like whatever filesystem is running on AWS has a really poor
implementation of mmap.
How many IOPS is the AWS instance limited to? AWS will rate limit all I/O
once you've maxed that to an abysmally low number causing all sorts of
problems unless you start shelling out some cash to get decent perf.
--Quanah
--
Quanah Gibson-Mount
Product Architect
Symas Corporation
Packaged, certified, and supported LDAP solutions powered by OpenLDAP:
<http://www.symas.com>
