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Disable recovery_prefetch for Neon hot standby.

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Prefetching of blocks referenced in WAL doesn't make sense for us,
because Neon hot standby anyway ignores pages that are not in the shared_buffers.
This commit is contained in:
Anastasia Lubennikova
2023-05-08 21:39:24 +01:00
parent 7b9e8be6e4
commit 0c4dc55a39
1 changed files with 6 additions and 0 deletions
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6
control_plane/src/endpoint.rs
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@@ -134,6 +134,7 @@ pub struct Endpoint {
// port and address of the Postgres server
pub address: SocketAddr,
// postgres major version in the format: 14, 15, etc.
pg_version: u32,
// These are not part of the endpoint as such, but the environment
@@ -381,6 +382,11 @@ impl Endpoint {
conf.append("primary_conninfo", connstr.as_str());
conf.append("primary_slot_name", slot_name.as_str());
conf.append("hot_standby", "on");
// prefetching of blocks referenced in WAL doesn't make sense for us
// Neon hot standby ignores pages that are not in the shared_buffers
if self.pg_version >= 15 {
conf.append("recovery_prefetch", "off");
}
}
}