Change "even large" to "even larger" because it is used in a comparison.
> ... a reasonable starting value for <varname>shared_buffers</varname> is 25%
> of the memory in your system. There are some workloads where even large settings
> for <varname>shared_buffers</varname> are effective, ...
... are some workloads where even larger settings ...
Regards,
Brad DeJong