From 255f822248949c307fba08fce31549ba6cc7764b Mon Sep 17 00:00:00 2001 From: Christian Schwarz Date: Tue, 9 Jul 2024 08:25:25 +0000 Subject: [PATCH] caveat --- docs/rfcs/034-direct-io-for-pageserver.md | 1 + 1 file changed, 1 insertion(+) diff --git a/docs/rfcs/034-direct-io-for-pageserver.md b/docs/rfcs/034-direct-io-for-pageserver.md index a6a9de514b..b55600832f 100644 --- a/docs/rfcs/034-direct-io-for-pageserver.md +++ b/docs/rfcs/034-direct-io-for-pageserver.md @@ -76,6 +76,7 @@ The outcome of the above will be that The norm will be very low baseline replacement rates in PS `PageCache`. High baseline replacement rates will be treated as a signal of resource exhaustion (page cache insufficient to host working set of the PS). It will be remediated by the storage controller, migrating tenants away to relieve pressure. +(Such a migration mechanism in storage controller is not part of this project.) In the future, we may elminate the `PageCache` even for indirect blocks. For example with an LRU cache that has as unit the entire disk btree content