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/sync performance optimizations (#2927)

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Since #2849 there is no limit for the current state we fetch to
calculate history visibility. In large rooms this can cause us to fetch
thousands of membership events we don't really care about.
This now only gets the state event types and senders in our timeline,
which should significantly reduce the amount of events we fetch from the
database.

Also removes `MaxTopologicalPosition`, as it is an unnecessary DB call,
given we use the result in `topological_position < $1` calls.
This commit is contained in:
Till 2023-01-17 10:08:23 +01:00 • committed by GitHub
parent 8582c7520a
commit 0d0280cf5f
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11 changed files with 372 additions and 105 deletions
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19
syncapi/routing/memberships.go
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@ -16,16 +16,16 @@ package routing
import (
"encoding/json"
"math"
"net/http"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
)
type getMembershipResponse struct {
@ -87,19 +87,18 @@ func GetMemberships(
if err != nil {
return jsonerror.InternalServerError()
}
defer db.Rollback() // nolint: errcheck
atToken, err := types.NewTopologyTokenFromString(at)
if err != nil {
atToken = types.TopologyToken{Depth: math.MaxInt64, PDUPosition: math.MaxInt64}
if queryRes.HasBeenInRoom && !queryRes.IsInRoom {
// If you have left the room then this will be the members of the room when you left.
atToken, err = db.EventPositionInTopology(req.Context(), queryRes.EventID)
} else {
// If you are joined to the room then this will be the current members of the room.
atToken, err = db.MaxTopologicalPosition(req.Context(), roomID)
}
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("unable to get 'atToken'")
return jsonerror.InternalServerError()
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("unable to get 'atToken'")
return jsonerror.InternalServerError()
}
}
}