/
msg_dbstats.go
77 lines (67 loc) · 2.12 KB
/
msg_dbstats.go
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// Copyright 2021 FerretDB Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pg
import (
"context"
"github.com/FerretDB/FerretDB/internal/handlers/common"
"github.com/FerretDB/FerretDB/internal/types"
"github.com/FerretDB/FerretDB/internal/util/lazyerrors"
"github.com/FerretDB/FerretDB/internal/util/must"
"github.com/FerretDB/FerretDB/internal/wire"
)
// MsgDBStats implements HandlerInterface.
func (h *Handler) MsgDBStats(ctx context.Context, msg *wire.OpMsg) (*wire.OpMsg, error) {
document, err := msg.Document()
if err != nil {
return nil, lazyerrors.Error(err)
}
var db string
if db, err = common.GetRequiredParam[string](document, "$db"); err != nil {
return nil, err
}
m := document.Map()
scale, ok := m["scale"].(float64)
if !ok {
scale = 1
}
stats, err := h.PgPool.SchemaStats(ctx, db, "")
if err != nil {
return nil, lazyerrors.Error(err)
}
var avgObjSize float64
if stats.CountRows > 0 {
avgObjSize = float64(stats.SizeRelation) / float64(stats.CountRows)
}
var reply wire.OpMsg
err = reply.SetSections(wire.OpMsgSection{
Documents: []*types.Document{must.NotFail(types.NewDocument(
"db", db,
"collections", stats.CountTables,
// TODO https://github.com/FerretDB/FerretDB/issues/176
"views", int32(0),
"objects", stats.CountRows,
"avgObjSize", avgObjSize,
"dataSize", float64(stats.SizeRelation)/scale,
"indexes", stats.CountIndexes,
"indexSize", float64(stats.SizeIndexes)/scale,
"totalSize", float64(stats.SizeTotal)/scale,
"scaleFactor", scale,
"ok", float64(1),
))},
})
if err != nil {
return nil, lazyerrors.Error(err)
}
return &reply, nil
}