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Christian Schwarz
2024-07-09 08:25:25 +00:00
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docs/rfcs/034-direct-io-for-pageserver.md
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@@ -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