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Prevent flip-flop of standby_horizon by ignoring 0 LSN and resetting it after each GC iteration

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Konstantin Knizhnik
2024-01-30 11:10:40 +02:00
parent 22a0a6ba0c
commit f24b898bef
13 changed files with 104 additions and 39 deletions
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51
libs/pageserver_api/src/models.rs
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@@ -654,9 +654,10 @@ pub struct WalRedoManagerStatus {
pub enum PagestreamFeMessage {
Exists(PagestreamExistsRequest),
Nblocks(PagestreamNblocksRequest),
GetPage(PagestreamGetPageRequest),
GetLatestPage(PagestreamGetLatestPageRequest), // for compatinility with old clients
DbSize(PagestreamDbSizeRequest),
GetSlruSegment(PagestreamGetSlruSegmentRequest),
GetPage(PagestreamGetPageRequest),
}
// Wrapped in libpq CopyData
@@ -709,6 +710,14 @@ pub struct PagestreamNblocksRequest {
pub rel: RelTag,
}
#[derive(Debug, PartialEq, Eq)]
pub struct PagestreamGetLatestPageRequest {
pub latest: bool,
pub lsn: Lsn,
pub rel: RelTag,
pub blkno: u32,
}
#[derive(Debug, PartialEq, Eq)]
pub struct PagestreamGetPageRequest {
pub horizon: Lsn,
@@ -798,8 +807,19 @@ impl PagestreamFeMessage {
bytes.put_u8(req.rel.forknum);
}
Self::GetPage(req) => {
Self::GetLatestPage(req) => {
bytes.put_u8(2);
bytes.put_u8(u8::from(req.latest));
bytes.put_u64(req.lsn.0);
bytes.put_u32(req.rel.spcnode);
bytes.put_u32(req.rel.dbnode);
bytes.put_u32(req.rel.relnode);
bytes.put_u8(req.rel.forknum);
bytes.put_u32(req.blkno);
}
Self::GetPage(req) => {
bytes.put_u8(4);
bytes.put_u64(req.horizon.0);
bytes.put_u64(req.lsn.0);
bytes.put_u32(req.rel.spcnode);
@@ -857,7 +877,25 @@ impl PagestreamFeMessage {
forknum: body.read_u8()?,
},
})),
2 => Ok(PagestreamFeMessage::GetPage(PagestreamGetPageRequest {
2 => Ok(PagestreamFeMessage::GetLatestPage(
PagestreamGetLatestPageRequest {
latest: body.read_u8()? != 0,
lsn: Lsn::from(body.read_u64::<BigEndian>()?),
rel: RelTag {
spcnode: body.read_u32::<BigEndian>()?,
dbnode: body.read_u32::<BigEndian>()?,
relnode: body.read_u32::<BigEndian>()?,
forknum: body.read_u8()?,
},
blkno: body.read_u32::<BigEndian>()?,
},
)),
3 => Ok(PagestreamFeMessage::DbSize(PagestreamDbSizeRequest {
horizon: Lsn::from(body.read_u64::<BigEndian>()?),
lsn: Lsn::from(body.read_u64::<BigEndian>()?),
dbnode: body.read_u32::<BigEndian>()?,
})),
4 => Ok(PagestreamFeMessage::GetPage(PagestreamGetPageRequest {
horizon: Lsn::from(body.read_u64::<BigEndian>()?),
lsn: Lsn::from(body.read_u64::<BigEndian>()?),
rel: RelTag {
@@ -868,12 +906,7 @@ impl PagestreamFeMessage {
},
blkno: body.read_u32::<BigEndian>()?,
})),
3 => Ok(PagestreamFeMessage::DbSize(PagestreamDbSizeRequest {
horizon: Lsn::from(body.read_u64::<BigEndian>()?),
lsn: Lsn::from(body.read_u64::<BigEndian>()?),
dbnode: body.read_u32::<BigEndian>()?,
})),
4 => Ok(PagestreamFeMessage::GetSlruSegment(
5 => Ok(PagestreamFeMessage::GetSlruSegment(
PagestreamGetSlruSegmentRequest {
latest: body.read_u8()? != 0,
lsn: Lsn::from(body.read_u64::<BigEndian>()?),