dendrite/syncapi/storage/tables/current_room_state_test.go
Till eb29a31550
Optimize /sync and history visibility (#2961)
Should fix the following issues or make a lot less worse when using
Postgres:

The main issue behind #2911: The client gives up after a certain time,
causing a cascade of context errors, because the response couldn't be
built up fast enough. This mostly happens on accounts with many rooms,
due to the inefficient way we're getting recent events and current state

For #2777: The queries for getting the membership events for history
visibility were being executed for each room (I think 185?), resulting
in a whooping 2k queries for membership events. (Getting the
statesnapshot -> block nids -> actual wanted membership event)

Both should now be better by:
- Using a LATERAL join to get all recent events for all joined rooms in
one go (TODO: maybe do the same for room summary and current state etc)
- If we're lazy loading on initial syncs, we're now not getting the
whole current state, just to drop the majority of it because we're lazy
loading members - we add a filter to exclude membership events on the
first call to `CurrentState`.
- Using an optimized query to get the membership events needed to
calculate history visibility

---------

Co-authored-by: kegsay <kegan@matrix.org>
2023-02-07 14:31:23 +01:00

128 lines
4.1 KiB
Go

package tables_test
import (
"context"
"database/sql"
"fmt"
"testing"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/syncapi/storage/postgres"
"github.com/matrix-org/dendrite/syncapi/storage/sqlite3"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/dendrite/test"
"github.com/matrix-org/gomatrixserverlib"
)
func newCurrentRoomStateTable(t *testing.T, dbType test.DBType) (tables.CurrentRoomState, *sql.DB, func()) {
t.Helper()
connStr, close := test.PrepareDBConnectionString(t, dbType)
db, err := sqlutil.Open(&config.DatabaseOptions{
ConnectionString: config.DataSource(connStr),
}, sqlutil.NewExclusiveWriter())
if err != nil {
t.Fatalf("failed to open db: %s", err)
}
var tab tables.CurrentRoomState
switch dbType {
case test.DBTypePostgres:
tab, err = postgres.NewPostgresCurrentRoomStateTable(db)
case test.DBTypeSQLite:
var stream sqlite3.StreamIDStatements
if err = stream.Prepare(db); err != nil {
t.Fatalf("failed to prepare stream stmts: %s", err)
}
tab, err = sqlite3.NewSqliteCurrentRoomStateTable(db, &stream)
}
if err != nil {
t.Fatalf("failed to make new table: %s", err)
}
return tab, db, close
}
func TestCurrentRoomStateTable(t *testing.T) {
ctx := context.Background()
alice := test.NewUser(t)
room := test.NewRoom(t, alice)
test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
tab, db, close := newCurrentRoomStateTable(t, dbType)
defer close()
events := room.CurrentState()
err := sqlutil.WithTransaction(db, func(txn *sql.Tx) error {
for i, ev := range events {
err := tab.UpsertRoomState(ctx, txn, ev, nil, types.StreamPosition(i))
if err != nil {
return fmt.Errorf("failed to UpsertRoomState: %w", err)
}
}
wantEventIDs := []string{
events[0].EventID(), events[1].EventID(), events[2].EventID(), events[3].EventID(),
}
gotEvents, err := tab.SelectEventsWithEventIDs(ctx, txn, wantEventIDs)
if err != nil {
return fmt.Errorf("failed to SelectEventsWithEventIDs: %w", err)
}
if len(gotEvents) != len(wantEventIDs) {
return fmt.Errorf("SelectEventsWithEventIDs\ngot %d, want %d results", len(gotEvents), len(wantEventIDs))
}
gotEventIDs := make(map[string]struct{}, len(gotEvents))
for _, event := range gotEvents {
if event.ExcludeFromSync {
return fmt.Errorf("SelectEventsWithEventIDs ExcludeFromSync should be false for current room state event %+v", event)
}
gotEventIDs[event.EventID()] = struct{}{}
}
for _, id := range wantEventIDs {
if _, ok := gotEventIDs[id]; !ok {
return fmt.Errorf("SelectEventsWithEventIDs\nexpected id %q not returned", id)
}
}
testCurrentState(t, ctx, txn, tab, room)
return nil
})
if err != nil {
t.Fatalf("err: %v", err)
}
})
}
func testCurrentState(t *testing.T, ctx context.Context, txn *sql.Tx, tab tables.CurrentRoomState, room *test.Room) {
t.Run("test currentState", func(t *testing.T) {
// returns the complete state of the room with a default filter
filter := gomatrixserverlib.DefaultStateFilter()
evs, err := tab.SelectCurrentState(ctx, txn, room.ID, &filter, nil)
if err != nil {
t.Fatal(err)
}
expectCount := 5
if gotCount := len(evs); gotCount != expectCount {
t.Fatalf("expected %d state events, got %d", expectCount, gotCount)
}
// When lazy loading, we expect no membership event, so only 4 events
filter.LazyLoadMembers = true
expectCount = 4
evs, err = tab.SelectCurrentState(ctx, txn, room.ID, &filter, nil)
if err != nil {
t.Fatal(err)
}
if gotCount := len(evs); gotCount != expectCount {
t.Fatalf("expected %d state events, got %d", expectCount, gotCount)
}
// same as above, but with existing NotTypes defined
notTypes := []string{gomatrixserverlib.MRoomMember}
filter.NotTypes = &notTypes
evs, err = tab.SelectCurrentState(ctx, txn, room.ID, &filter, nil)
if err != nil {
t.Fatal(err)
}
if gotCount := len(evs); gotCount != expectCount {
t.Fatalf("expected %d state events, got %d", expectCount, gotCount)
}
})
}