"Currently, the VM aims for a 1:1 ratio between the lists, which is the
"perfect" trade-off between the ability to protect frequently used
pages and the ability to detect frequently used pages. This means
that working set changes bigger than half of cache memory go
undetected and thrash indefinitely, whereas working sets bigger than
half of cache memory are unprotected against used-once streams that
don't even need caching."
"Currently, the VM aims for a 1:1 ratio between the lists, which is the "perfect" trade-off between the ability to protect frequently used pages and the ability to detect frequently used pages. This means that working set changes bigger than half of cache memory go undetected and thrash indefinitely, whereas working sets bigger than half of cache memory are unprotected against used-once streams that don't even need caching."