diff --git a/pkg/apis/monitor/suggestsys_const.go b/pkg/apis/monitor/suggestsys_const.go
index cfcc4527e9..15fbdfe6d3 100644
--- a/pkg/apis/monitor/suggestsys_const.go
+++ b/pkg/apis/monitor/suggestsys_const.go
@@ -18,8 +18,11 @@ const (
 	EIP_UN_USED  = "EIP_UNUSED"
 	DISK_UN_USED = "DISK_UNUSED"
 	LB_UN_USED   = "LB_UNUSED"
+	SCALE_DOWN   = "SCALE_DOWN"
+	SCALE_UP     = "SCALE_UP"
 
-	DRIVER_ACTION = "DELETE"
+	DRIVER_ACTION            = "DELETE"
+	SCALE_DOWN_DRIVER_ACTION = "SCALE DOWN"
 
 	EIP_UNUSED_START_DELETE = "start_delete"
 	EIP_UNUSED_DELETE_FAIL  = "delete_fail"
@@ -30,13 +33,15 @@ type MonitorSuggest string
 type MonitorResourceType string
 
 const (
-	EIP_MONITOR_RES_TYPE  = MonitorResourceType("弹性EIP")
-	DISK_MONITOR_RES_TYPE = MonitorResourceType("云硬盘")
-	LB_MONITOR_RES_TYPE   = MonitorResourceType("负载均衡实例")
+	EIP_MONITOR_RES_TYPE    = MonitorResourceType("弹性EIP")
+	DISK_MONITOR_RES_TYPE   = MonitorResourceType("云硬盘")
+	LB_MONITOR_RES_TYPE     = MonitorResourceType("负载均衡实例")
+	SCALE_MONTITOR_RES_TYPE = MonitorResourceType("虚拟机")
 )
 
 const (
-	EIP_MONITOR_SUGGEST  = MonitorSuggest("释放未使用的EIP")
-	DISK_MONITOR_SUGGEST = MonitorSuggest("释放未使用的Disk")
-	LB_MONITOR_SUGGEST   = MonitorSuggest("释放未使用的LB")
+	EIP_MONITOR_SUGGEST        = MonitorSuggest("释放未使用的EIP")
+	DISK_MONITOR_SUGGEST       = MonitorSuggest("释放未使用的Disk")
+	LB_MONITOR_SUGGEST         = MonitorSuggest("释放未使用的LB")
+	SCALE_DOWN_MONITOR_SUGGEST = MonitorSuggest("缩减机器配置")
 )
diff --git a/pkg/apis/monitor/suggestsysrule.go b/pkg/apis/monitor/suggestsysrule.go
index 219dfebc79..921d7201cd 100644
--- a/pkg/apis/monitor/suggestsysrule.go
+++ b/pkg/apis/monitor/suggestsysrule.go
@@ -20,6 +20,25 @@ import (
 	"yunion.io/x/onecloud/pkg/apis"
 )
 
+const (
+	METRIC_TAG   = "TAG"
+	METRIC_FIELD = "FIELD"
+)
+
+var PROPERTY_TYPE = []string{"databases", "measurements", "metric-measurement"}
+
+var METRIC_ATTRI = []string{METRIC_TAG, METRIC_FIELD}
+
+type InfluxMeasurement struct {
+	apis.Meta
+	Database    string
+	Measurement string
+	TagKey      []string
+	TagValue    map[string][]string
+	FieldKey    []string
+	Unit        []string
+}
+
 type SuggestSysRuleListInput struct {
 	apis.VirtualResourceListInput
 	apis.EnabledResourceBaseListInput
@@ -29,10 +48,11 @@ type SuggestSysRuleCreateInput struct {
 	apis.VirtualResourceCreateInput
 
 	// 查询指标周期
-	Period  string                   `json:"period"`
-	Type    string                   `json:"type"`
-	Enabled *bool                    `json:"enabled"`
-	Setting *SSuggestSysAlertSetting `json:"setting"`
+	Period   string                   `json:"period"`
+	TimeFrom string                   `json:"time_from"`
+	Type     string                   `json:"type"`
+	Enabled  *bool                    `json:"enabled"`
+	Setting  *SSuggestSysAlertSetting `json:"setting"`
 }
 
 type SuggestSysRuleUpdateInput struct {
@@ -60,6 +80,7 @@ type SSuggestSysAlertSetting struct {
 	EIPUnused  *EIPUnused  `json:"eip_unused"`
 	DiskUnused *DiskUnused `json:"disk_unused"`
 	LBUnused   *LBUnused   `json:"lb_unused"`
+	ScaleRule  *ScaleRule  `json:"scale_rule"`
 }
 
 type EIPUnused struct {
@@ -71,3 +92,22 @@ type DiskUnused struct {
 
 type LBUnused struct {
 }
+
+type ScaleRule []Scale
+
+type Scale struct {
+	Database    string `json:"database"`
+	Measurement string `json:"measurement"`
+	//rule operator rule [and|or]
+	Operator  string  `json:"operator"`
+	Field     string  `json:"field"`
+	EvalType  string  `json:"eval_type"`
+	Threshold float64 `json:"threshold"`
+	Tag       string  `json:"tag"`
+	TagVal    string  `json:"tag_val"`
+}
+
+type ScaleEvalMatch struct {
+	EvalMatch
+	ResourceId map[string]string `json:"resource_id"`
+}
diff --git a/pkg/mcclient/modules/mod_suggestsysrule.go b/pkg/mcclient/modules/mod_suggestsysrule.go
index 593b5ba759..0082c94b44 100644
--- a/pkg/mcclient/modules/mod_suggestsysrule.go
+++ b/pkg/mcclient/modules/mod_suggestsysrule.go
@@ -21,14 +21,17 @@ import (
 var (
 	SuggestSysRuleManager  *SSuggestSysRuleManager
 	SuggestSysAlertManager *SSuggestSysAlertManager
+	InfluxdbShemaManager   *SInfluxdbShemaManager
 )
 
 func init() {
 	SuggestSysRuleManager = NewSuggestSysRuleManager()
 	SuggestSysAlertManager = NewSuggestSysAlertManager()
+	InfluxdbShemaManager = NewInfluxdbShemaManager()
 	for _, m := range []modulebase.IBaseManager{
 		SuggestSysRuleManager,
 		SuggestSysAlertManager,
+		InfluxdbShemaManager,
 	} {
 		Register(m)
 	}
@@ -42,6 +45,10 @@ type SSuggestSysAlertManager struct {
 	*modulebase.ResourceManager
 }
 
+type SInfluxdbShemaManager struct {
+	*modulebase.ResourceManager
+}
+
 func NewSuggestSysRuleManager() *SSuggestSysRuleManager {
 	man := NewMonitorV2Manager("suggestsysrule", "suggestsysrules",
 		[]string{"id", "name", "type", "enabled", "setting"},
@@ -59,3 +66,12 @@ func NewSuggestSysAlertManager() *SSuggestSysAlertManager {
 		ResourceManager: &man,
 	}
 }
+
+func NewInfluxdbShemaManager() *SInfluxdbShemaManager {
+	man := NewMonitorV2Manager("influxdbshema", "influxdbshemas",
+		[]string{},
+		[]string{})
+	return &SInfluxdbShemaManager{
+		ResourceManager: &man,
+	}
+}
diff --git a/pkg/mcclient/modules/monitor/suggestsysrule.go b/pkg/mcclient/modules/monitor/suggestsysrule.go
index fefe76b683..aaea27585d 100644
--- a/pkg/mcclient/modules/monitor/suggestsysrule.go
+++ b/pkg/mcclient/modules/monitor/suggestsysrule.go
@@ -22,14 +22,17 @@ import (
 var (
 	SuggestSysRuleManager  *SSuggestSysRuleManager
 	SuggestSysAlertManager *SSuggestSysAlertManager
+	InfluxdbShemaManager   *SInfluxdbShemaManager
 )
 
 func init() {
 	SuggestSysRuleManager = NewSuggestSysRuleManager()
 	SuggestSysAlertManager = NewSuggestSysAlertManager()
+	InfluxdbShemaManager = NewInfluxdbShemaManager()
 	for _, m := range []modulebase.IBaseManager{
 		SuggestSysRuleManager,
 		SuggestSysAlertManager,
+		InfluxdbShemaManager,
 	} {
 		modules.Register(m)
 	}
@@ -43,6 +46,10 @@ type SSuggestSysAlertManager struct {
 	*modulebase.ResourceManager
 }
 
+type SInfluxdbShemaManager struct {
+	*modulebase.ResourceManager
+}
+
 func NewSuggestSysRuleManager() *SSuggestSysRuleManager {
 	man := modules.NewMonitorV2Manager("suggestsysrule", "suggestsysrules",
 		[]string{"id", "name", "type", "enabled", "setting"},
@@ -60,3 +67,12 @@ func NewSuggestSysAlertManager() *SSuggestSysAlertManager {
 		ResourceManager: &man,
 	}
 }
+
+func NewInfluxdbShemaManager() *SInfluxdbShemaManager {
+	man := modules.NewMonitorV2Manager("influxdbshema", "influxdbshemas",
+		[]string{},
+		[]string{})
+	return &SInfluxdbShemaManager{
+		ResourceManager: &man,
+	}
+}
diff --git a/pkg/mcclient/options/monitor/influxdbshema.go b/pkg/mcclient/options/monitor/influxdbshema.go
new file mode 100644
index 0000000000..fc46638b6f
--- /dev/null
+++ b/pkg/mcclient/options/monitor/influxdbshema.go
@@ -0,0 +1,23 @@
+package monitor
+
+import (
+	"yunion.io/x/jsonutils"
+
+	"yunion.io/x/onecloud/pkg/apis/monitor"
+)
+
+type InfluxdbShemaListOptions struct {
+}
+
+type InfluxdbShemaShowOptions struct {
+	ID          string `help:"attribute of the inluxdb" choices:"databases|measurements|metric-measurement"`
+	Database    string `help:influxdb database`
+	Measurement string `help:influxdb table`
+}
+
+func (opt InfluxdbShemaShowOptions) Params() (jsonutils.JSONObject, error) {
+	input := new(monitor.InfluxMeasurement)
+	input.Measurement = opt.Measurement
+	input.Database = opt.Database
+	return input.JSON(input), nil
+}
diff --git a/pkg/mcclient/options/monitor/suggestsysrule.go b/pkg/mcclient/options/monitor/suggestsysrule.go
index b100743e52..1f2f549011 100644
--- a/pkg/mcclient/options/monitor/suggestsysrule.go
+++ b/pkg/mcclient/options/monitor/suggestsysrule.go
@@ -38,7 +38,7 @@ type SuggestSysRuleAlertSettingOptions struct {
 type SuggestRuleCreateOptions struct {
 	SuggestSysRuleAlertSettingOptions
 	Name    string `help:"Name of the alert"`
-	Type    string `help:"Type of suggest rule" choices:"EIP_UNUSED|DISK_UNUSED|LB_UNUSED"`
+	Type    string `help:"Type of suggest rule" choices:"EIP_UNUSED|DISK_UNUSED|LB_UNUSED|SCALE_DOWN"`
 	Enabled bool   `help:"Enable rule"`
 	Period  string `help:"Period of suggest rule e.g. '5s', '1m'" default:"30s""`
 }
@@ -86,6 +86,34 @@ func newSuggestSysAlertSetting(tp string) *monitor.SSuggestSysAlertSetting {
 		setting = &monitor.SSuggestSysAlertSetting{
 			LBUnused: &monitor.LBUnused{},
 		}
+	case monitor.SCALE_DOWN:
+		scaleRuel := make(monitor.ScaleRule, 0)
+		scale := monitor.Scale{
+			Database:    "telegraf",
+			Measurement: "vm_cpu",
+			Operator:    "and",
+			Field:       "usage_active",
+			EvalType:    ">=",
+			Threshold:   50,
+			Tag:         "",
+			TagVal:      "",
+		}
+		scaleRuel = append(scaleRuel, scale)
+		scale = monitor.Scale{
+			Database:    "telegraf",
+			Measurement: "vm_diskio",
+			Operator:    "or",
+			Field:       "read_bps",
+			EvalType:    ">=",
+			Threshold:   500,
+			Tag:         "",
+			TagVal:      "",
+		}
+		scaleRuel = append(scaleRuel, scale)
+		setting = &monitor.SSuggestSysAlertSetting{
+			ScaleRule: &scaleRuel,
+		}
+
 	}
 	return setting
 }
diff --git a/pkg/monitor/alerting/conditions/query.go b/pkg/monitor/alerting/conditions/query.go
index 2abb9c06d7..11e2c47841 100644
--- a/pkg/monitor/alerting/conditions/query.go
+++ b/pkg/monitor/alerting/conditions/query.go
@@ -17,7 +17,6 @@ package conditions
 import (
 	gocontext "context"
 	"fmt"
-	"strings"
 
 	"yunion.io/x/jsonutils"
 	"yunion.io/x/pkg/errors"
@@ -76,14 +75,14 @@ func (c FormatCond) String() string {
 }
 
 func (c *QueryCondition) filterTags(tags map[string]string) map[string]string {
-	ret := make(map[string]string)
-	for key, val := range tags {
-		if strings.HasSuffix(key, "_id") {
-			continue
-		}
-		ret[key] = val
-	}
-	return ret
+	//ret := make(map[string]string)
+	//for key, val := range tags {
+	//	if strings.HasSuffix(key, "_id") {
+	//		continue
+	//	}
+	//	ret[key] = val
+	//}
+	return tags
 }
 
 // Eval evaluates te `QueryCondition`.
diff --git a/pkg/monitor/alerting/rule.go b/pkg/monitor/alerting/rule.go
index 08341c5728..ff8eb67216 100644
--- a/pkg/monitor/alerting/rule.go
+++ b/pkg/monitor/alerting/rule.go
@@ -201,3 +201,7 @@ var conditionFactories = make(map[string]ConditionFactory)
 func RegisterCondition(typeName string, factory ConditionFactory) {
 	conditionFactories[typeName] = factory
 }
+
+func GetConditionFactories() map[string]ConditionFactory {
+	return conditionFactories
+}
diff --git a/pkg/monitor/models/datasource.go b/pkg/monitor/models/datasource.go
index 76ad9d2f44..c38bbd6a95 100644
--- a/pkg/monitor/models/datasource.go
+++ b/pkg/monitor/models/datasource.go
@@ -17,10 +17,13 @@ package models
 import (
 	"context"
 	"database/sql"
+	"fmt"
+	"strings"
 	"time"
 
 	"golang.org/x/sync/errgroup"
 
+	"yunion.io/x/jsonutils"
 	"yunion.io/x/log"
 	"yunion.io/x/pkg/errors"
 	"yunion.io/x/pkg/tristate"
@@ -28,10 +31,12 @@ import (
 
 	"yunion.io/x/onecloud/pkg/apis/monitor"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
+	"yunion.io/x/onecloud/pkg/httperrors"
 	"yunion.io/x/onecloud/pkg/mcclient/auth"
 	"yunion.io/x/onecloud/pkg/monitor/options"
 	"yunion.io/x/onecloud/pkg/monitor/registry"
 	"yunion.io/x/onecloud/pkg/monitor/tsdb"
+	"yunion.io/x/onecloud/pkg/util/influxdb"
 )
 
 var (
@@ -167,3 +172,121 @@ func (ds *SDataSource) ToTSDBDataSource(db string) *tsdb.DataSource {
 		TimeInterval: ds.TimeInterval,*/
 	}
 }
+
+func (self *SDataSourceManager) GetDatabases() (jsonutils.JSONObject, error) {
+	ret := jsonutils.NewDict()
+	dataSource, err := self.GetDefaultSource()
+	if err != nil {
+		return jsonutils.JSONNull, errors.Wrap(err, "s.GetDefaultSource")
+	}
+	db := influxdb.NewInfluxdb(dataSource.Url)
+	//db.SetDatabase("telegraf")
+	databases, err := db.GetDatabases()
+	if err != nil {
+		return jsonutils.JSONNull, errors.Wrap(err, "GetDatabases")
+	}
+	ret.Add(jsonutils.NewStringArray(databases), "databases")
+	return ret, nil
+}
+
+func (self *SDataSourceManager) GetMeasurements(query jsonutils.JSONObject) (jsonutils.JSONObject, error) {
+	ret := jsonutils.NewDict()
+	database, _ := query.GetString("database")
+	if database == "" {
+		return jsonutils.JSONNull, httperrors.NewInputParameterError("not support database")
+	}
+	dataSource, err := self.GetDefaultSource()
+	if err != nil {
+		return jsonutils.JSONNull, errors.Wrap(err, "s.GetDefaultSource")
+	}
+	db := influxdb.NewInfluxdb(dataSource.Url)
+	db.SetDatabase(database)
+	dbRtn, err := db.Query(fmt.Sprintf("SHOW MEASUREMENTS ON %s", database))
+	if err != nil {
+		return jsonutils.JSONNull, errors.Wrap(err, "SHOW MEASUREMENTS")
+	}
+	res := dbRtn[0][0]
+	measurements := make([]monitor.InfluxMeasurement, len(res.Values))
+	for i := range res.Values {
+		tmpDict := jsonutils.NewDict()
+		tmpDict.Add(res.Values[i][0], "measurement")
+		err := tmpDict.Unmarshal(&measurements[i])
+		if err != nil {
+			return jsonutils.JSONNull, errors.Wrap(err, "measurement unmarshal error")
+		}
+	}
+	ret.Add(jsonutils.Marshal(&measurements), "measurements")
+	return ret, nil
+}
+
+func (self *SDataSourceManager) GetMetricMeasurement(query jsonutils.JSONObject) (jsonutils.JSONObject, error) {
+	database, _ := query.GetString("database")
+	if database == "" {
+		return jsonutils.JSONNull, httperrors.NewInputParameterError("not support database")
+	}
+	measurement, _ := query.GetString("measurement")
+	if measurement == "" {
+		return jsonutils.JSONNull, httperrors.NewInputParameterError("not support measurement")
+	}
+	dataSource, err := self.GetDefaultSource()
+	if err != nil {
+		return jsonutils.JSONNull, errors.Wrap(err, "s.GetDefaultSource")
+	}
+
+	db := influxdb.NewInfluxdb(dataSource.Url)
+	db.SetDatabase(database)
+	output := new(monitor.InfluxMeasurement)
+	output.Measurement = measurement
+	output.Database = database
+	for _, val := range monitor.METRIC_ATTRI {
+		err = getAttributesOnMeasurement(database, val, output, db)
+		if err != nil {
+			return jsonutils.JSONNull, errors.Wrap(err, "getAttributesOnMeasurement error")
+		}
+	}
+	err = getTagValue(database, output, db)
+	if err != nil {
+		return jsonutils.JSONNull, errors.Wrap(err, "getTagValue error")
+	}
+	return jsonutils.Marshal(output), nil
+
+}
+
+func getAttributesOnMeasurement(database, tp string, output *monitor.InfluxMeasurement, db *influxdb.SInfluxdb) error {
+	dbRtn, err := db.Query(fmt.Sprintf("SHOW %s KEYS ON %s FROM %s", tp, database, output.Measurement))
+	if err != nil {
+		return errors.Wrap(err, "SHOW MEASUREMENTS")
+	}
+	res := dbRtn[0][0]
+	tmpDict := jsonutils.NewDict()
+	tmpArr := jsonutils.NewArray()
+	for i := range res.Values {
+		tmpArr.Add(res.Values[i][0])
+	}
+	tmpDict.Add(tmpArr, res.Columns[0])
+	err = tmpDict.Unmarshal(output)
+	if err != nil {
+		return errors.Wrap(err, "measurement unmarshal error")
+	}
+	return nil
+}
+
+func getTagValue(database string, output *monitor.InfluxMeasurement, db *influxdb.SInfluxdb) error {
+
+	dbRtn, err := db.Query(fmt.Sprintf("SHOW TAG VALUES ON %s FROM %s WITH KEY IN (%s)", database, output.Measurement, strings.Join(output.TagKey, ",")))
+	if err != nil {
+		return errors.Wrap(err, "SHOW MEASUREMENTS")
+	}
+	res := dbRtn[0][0]
+	tagValue := make(map[string][]string, 0)
+	for i := range res.Values {
+		val := res.Values[i][0].(*jsonutils.JSONString)
+		if _, ok := tagValue[val.Value()]; !ok {
+			tagValue[val.Value()] = make([]string, 0)
+		}
+		tag := res.Values[i][1].(*jsonutils.JSONString)
+		tagValue[val.Value()] = append(tagValue[val.Value()], tag.Value())
+	}
+	output.TagValue = tagValue
+	return nil
+}
diff --git a/pkg/monitor/models/suggestsysalart.go b/pkg/monitor/models/suggestsysalart.go
index f87eb478ce..f502d35685 100644
--- a/pkg/monitor/models/suggestsysalart.go
+++ b/pkg/monitor/models/suggestsysalart.go
@@ -200,6 +200,8 @@ func (self *SSuggestSysAlert) getMoreDetails(out monitor.SuggestSysAlertDetails)
 		out.Suggest = string(monitor.DISK_MONITOR_SUGGEST)
 	case monitor.LB_UN_USED:
 		out.Suggest = string(monitor.LB_MONITOR_SUGGEST)
+	case monitor.SCALE_DOWN:
+		out.Suggest = string(monitor.SCALE_DOWN_MONITOR_SUGGEST)
 
 	}
 	return out
@@ -263,7 +265,7 @@ func (self *SSuggestSysAlert) Delete(ctx context.Context, userCred mcclient.Toke
 }
 
 func (self *SSuggestSysAlert) RealDelete(ctx context.Context, userCred mcclient.TokenCredential) error {
-	return self.SVirtualResourceBase.Delete(ctx, userCred)
+	return db.DeleteModel(ctx, userCred, self)
 }
 
 func (self *SSuggestSysAlert) StartDeleteTask(
diff --git a/pkg/monitor/models/suggestsysrule.go b/pkg/monitor/models/suggestsysrule.go
index 7049914d31..01501ea986 100644
--- a/pkg/monitor/models/suggestsysrule.go
+++ b/pkg/monitor/models/suggestsysrule.go
@@ -60,6 +60,7 @@ type SSuggestSysRule struct {
 
 	Type     string               `width:"256" charset:"ascii" list:"user" update:"user"`
 	Period   string               `width:"256" charset:"ascii" list:"user" update:"user"`
+	TimeFrom string               `width:"256" charset:"ascii" list:"user" update:"user"`
 	Setting  jsonutils.JSONObject ` list:"user" update:"user"`
 	ExecTime time.Time            `json:"exec_time"`
 }
@@ -84,13 +85,9 @@ func (man *SSuggestSysRuleManager) FetchSuggestSysAlartSettings(ruleTypes ...str
 //根据数据库中查询得到的信息进行适配转换，同时更新drivers中的内容
 func (dConfig *SSuggestSysRule) getSuggestSysAlertSetting() (*monitor.SSuggestSysAlertSetting, error) {
 	setting := new(monitor.SSuggestSysAlertSetting)
-	switch dConfig.Type {
-	case monitor.EIP_UN_USED:
-		setting.EIPUnused = new(monitor.EIPUnused)
-		err := dConfig.Setting.Unmarshal(setting.EIPUnused)
-		if err != nil {
-			return nil, errors.Wrap(err, "SSuggestSysRule getSuggestSysAlertSetting error")
-		}
+	err := dConfig.Setting.Unmarshal(setting)
+	if err != nil {
+		return nil, errors.Wrap(err, "SSuggestSysRule getSuggestSysAlertSetting error")
 	}
 	return setting, nil
 }
@@ -124,6 +121,9 @@ func (man *SSuggestSysRuleManager) ValidateCreateData(
 		// default 30s
 		data.Period = "30s"
 	}
+	if data.TimeFrom == "" {
+		data.TimeFrom = "24h"
+	}
 	if data.Enabled == nil {
 		enable := true
 		data.Enabled = &enable
@@ -131,6 +131,9 @@ func (man *SSuggestSysRuleManager) ValidateCreateData(
 	if _, err := time.ParseDuration(data.Period); err != nil {
 		return data, httperrors.NewInputParameterError("Invalid period format: %s", data.Period)
 	}
+	if _, err := time.ParseDuration(data.TimeFrom); err != nil {
+		return data, httperrors.NewInputParameterError("Invalid period format: %s", data.TimeFrom)
+	}
 	if dri, ok := suggestSysRuleDrivers[data.Type]; !ok {
 		return data, httperrors.NewInputParameterError("not support type %q", data.Type)
 	} else {
@@ -139,6 +142,11 @@ func (man *SSuggestSysRuleManager) ValidateCreateData(
 		if err != nil {
 			return data, err
 		}
+		if data.Type == monitor.SCALE_DOWN || data.Type == monitor.SCALE_UP {
+			if data.Setting == nil {
+				return data, httperrors.NewInputParameterError("no found rule setting")
+			}
+		}
 		if data.Setting != nil {
 			err = dri.ValidateSetting(data.Setting)
 			if err != nil {
@@ -269,6 +277,36 @@ func (self *SSuggestSysRuleManager) GetPropertyRuleType(ctx context.Context, use
 	return ret, nil
 }
 
+func (self *SSuggestSysRuleManager) AllowGetPropertyDatabases(ctx context.Context, userCred mcclient.TokenCredential,
+	query jsonutils.JSONObject) bool {
+	return true
+}
+func (self *SSuggestSysRuleManager) GetPropertyDatabases(ctx context.Context, userCred mcclient.TokenCredential,
+	query jsonutils.JSONObject) (jsonutils.JSONObject, error) {
+	return DataSourceManager.GetDatabases()
+}
+
+func (self *SSuggestSysRuleManager) AllowGetPropertyMeasurements(ctx context.Context, userCred mcclient.TokenCredential,
+	query jsonutils.JSONObject) bool {
+	return true
+}
+
+func (self *SSuggestSysRuleManager) GetPropertyMeasurements(ctx context.Context, userCred mcclient.TokenCredential,
+	query jsonutils.JSONObject) (jsonutils.JSONObject, error) {
+	return DataSourceManager.GetMeasurements(query)
+}
+
+func (self *SSuggestSysRuleManager) AllowGetPropertyMetricMeasurement(ctx context.Context,
+	userCred mcclient.TokenCredential,
+	query jsonutils.JSONObject) bool {
+	return true
+}
+
+func (self *SSuggestSysRuleManager) GetPropertyMetricMeasurement(ctx context.Context, userCred mcclient.TokenCredential,
+	query jsonutils.JSONObject) (jsonutils.JSONObject, error) {
+	return DataSourceManager.GetMetricMeasurement(query)
+}
+
 func (self *SSuggestSysRuleManager) GetRules(tp ...string) ([]SSuggestSysRule, error) {
 	rules := make([]SSuggestSysRule, 0)
 	query := self.Query()
diff --git a/pkg/monitor/suggestsysdrivers/driverconfig.go b/pkg/monitor/suggestsysdrivers/driverconfig.go
index 9e37441ae0..ceab887c71 100644
--- a/pkg/monitor/suggestsysdrivers/driverconfig.go
+++ b/pkg/monitor/suggestsysdrivers/driverconfig.go
@@ -25,7 +25,7 @@ import (
 )
 
 func init() {
-	models.RegisterSuggestSysRuleDrivers(NewEIPUsedDriver(), NewDiskUnusedDriver(), NewLBUnusedDriver())
+	models.RegisterSuggestSysRuleDrivers(NewEIPUsedDriver(), NewDiskUnusedDriver(), NewLBUnusedDriver(), NewScaleDownDriver())
 }
 
 func InitSuggestSysRuleCronjob() {
diff --git a/pkg/monitor/suggestsysdrivers/scaledown.go b/pkg/monitor/suggestsysdrivers/scaledown.go
new file mode 100644
index 0000000000..d474cc7e25
--- /dev/null
+++ b/pkg/monitor/suggestsysdrivers/scaledown.go
@@ -0,0 +1,320 @@
+package suggestsysdrivers
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"yunion.io/x/jsonutils"
+	"yunion.io/x/log"
+	"yunion.io/x/pkg/errors"
+	"yunion.io/x/pkg/utils"
+
+	"yunion.io/x/onecloud/pkg/apis/monitor"
+	"yunion.io/x/onecloud/pkg/httperrors"
+	"yunion.io/x/onecloud/pkg/mcclient"
+	"yunion.io/x/onecloud/pkg/mcclient/auth"
+	"yunion.io/x/onecloud/pkg/mcclient/modules"
+	"yunion.io/x/onecloud/pkg/monitor/alerting"
+	"yunion.io/x/onecloud/pkg/monitor/models"
+	"yunion.io/x/onecloud/pkg/monitor/validators"
+)
+
+type ScaleDown struct {
+	monitor.ScaleRule
+}
+
+func NewScaleDownDriver() models.ISuggestSysRuleDriver {
+	return &ScaleDown{
+		ScaleRule: []monitor.Scale{},
+	}
+}
+
+func (_ *ScaleDown) GetType() string {
+	return monitor.SCALE_DOWN
+
+}
+
+func (rule *ScaleDown) GetResourceType() string {
+	return string(monitor.SCALE_MONTITOR_RES_TYPE)
+}
+
+func (rule *ScaleDown) ValidateSetting(input *monitor.SSuggestSysAlertSetting) error {
+	if input.ScaleRule == nil {
+		return httperrors.NewInputParameterError("no found rule setting ")
+	}
+	if len(*input.ScaleRule) == 0 {
+		return httperrors.NewInputParameterError("no found customize monitor rule")
+	}
+	for _, scale := range *input.ScaleRule {
+		if scale.Database == "" {
+			return httperrors.NewInputParameterError("database is missing")
+		}
+		if scale.Measurement == "" {
+			return httperrors.NewInputParameterError("measurement is missing")
+		}
+		if scale.Field == "" {
+			return httperrors.NewInputParameterError("field is missing")
+		}
+		if !utils.IsInStringArray(getQueryEvalType(scale), validators.EvaluatorDefaultTypes) {
+			return httperrors.NewInputParameterError("the evalType is illegal")
+		}
+		if scale.Threshold == 0 {
+			return httperrors.NewInputParameterError("threshold is meaningless")
+		}
+	}
+	return nil
+}
+
+func getQueryEvalType(scale monitor.Scale) string {
+	typ := ""
+	switch scale.EvalType {
+	case ">=", ">":
+		typ = "gt"
+	case "<=", "<":
+		typ = "lt"
+	}
+	return typ
+}
+
+func (rule *ScaleDown) DoSuggestSysRule(ctx context.Context, userCred mcclient.TokenCredential, isStart bool) {
+	doSuggestSysRule(ctx, userCred, isStart, rule)
+}
+
+func (rule *ScaleDown) Run(instance *monitor.SSuggestSysAlertSetting) {
+	oldAlert, err := getLastAlerts(rule)
+	if err != nil {
+		log.Errorln(err)
+		return
+	}
+	newAlert, err := rule.getLatestAlerts(instance)
+	if err != nil {
+		log.Errorln(err)
+		return
+	}
+	DealAlertData(oldAlert, newAlert.Value())
+}
+
+func (rule *ScaleDown) getLatestAlerts(instance *monitor.SSuggestSysAlertSetting) (*jsonutils.JSONArray, error) {
+	//scaleEvalMatchs := make([]*monitor.EvalMatch, 0)
+	firing, evalMatchMap, err := rule.getScaleEvalResult(*instance.ScaleRule)
+	if err != nil {
+		return jsonutils.NewArray(), errors.Wrap(err, "rule getScaleEvalResult happen error")
+	}
+	if firing {
+
+		serverArr, err := rule.getResourcesByEvalMatchsMap(evalMatchMap, instance)
+		if err != nil {
+			return jsonutils.NewArray(), errors.Wrap(err, "rule  getResource error")
+		}
+		return serverArr, nil
+	}
+	return jsonutils.NewArray(), nil
+}
+
+func (rule *ScaleDown) getScaleEvalResult(scales []monitor.Scale) (bool, map[string][]*monitor.EvalMatch, error) {
+	firing := false
+	scaleEvalMatchs := make(map[string][]*monitor.EvalMatch, 0)
+	for index, scale := range scales {
+		condition := monitor.AlertCondition{
+			Type:      "query",
+			Query:     rule.newAlertQuery(scale),
+			Evaluator: monitor.Condition{Type: getQueryEvalType(scale), Params: []float64{scale.Threshold}},
+			Reducer:   monitor.Condition{Type: "avg"},
+			Operator:  scale.Operator,
+		}
+		factory := alerting.GetConditionFactories()[condition.Type]
+		queryCondition, err := factory(&condition, index)
+		if err != nil {
+			return firing, scaleEvalMatchs, errors.Wrapf(err, "construct query condition %s",
+				jsonutils.Marshal(condition))
+		}
+		//evalContext := alerting.NewEvalContext(context.Background(), auth.AdminCredential(), nil)
+		evalContext := alerting.EvalContext{
+			Ctx:       context.Background(),
+			UserCred:  auth.AdminCredential(),
+			IsDebug:   true,
+			IsTestRun: true,
+		}
+		conditionResult, err := queryCondition.Eval(&evalContext)
+		if err != nil {
+			return firing, scaleEvalMatchs, errors.Wrap(err, "condition eval error")
+		}
+		if index == 0 {
+			firing = conditionResult.Firing
+		}
+
+		// calculating Firing based on operator
+		if conditionResult.Operator == "or" {
+			firing = firing || conditionResult.Firing
+		} else {
+			firing = firing && conditionResult.Firing
+		}
+		if firing {
+			evalMatchs := conditionResult.EvalMatches
+			if conditionResult.Operator == "and" {
+				if index != 0 {
+					evalMatchs = getAndEvalMatches(scaleEvalMatchs, evalMatchs)
+					if len(evalMatchs) == 0 {
+						return false, scaleEvalMatchs, nil
+					}
+				}
+			}
+			key := fmt.Sprintf("%s--%d", scale.Field, index)
+			scaleEvalMatchs[key] = evalMatchs
+		}
+	}
+	return firing, scaleEvalMatchs, nil
+}
+
+func (rule *ScaleDown) getResourcesByEvalMatchsMap(evalMatchsMap map[string][]*monitor.EvalMatch, instance *monitor.SSuggestSysAlertSetting) (*jsonutils.JSONArray, error) {
+	matchLength := 0
+	var maxEvalMatch []*monitor.EvalMatch
+	for _, evalMatchs := range evalMatchsMap {
+		if len(evalMatchs) > matchLength {
+			matchLength = len(evalMatchs)
+			maxEvalMatch = evalMatchs
+		}
+	}
+	serverArr := jsonutils.NewArray()
+	for _, evalMatch := range maxEvalMatch {
+		server, mappingId, mappingVal := getServerFromEvalMatch(evalMatch)
+		if mappingId == "" {
+			continue
+		}
+		suggestSysAlert, err := getSuggestSysAlertFromJson(server, rule)
+		if err != nil {
+			return serverArr, errors.Wrap(err, "Scale getSuggestSysAlertFromJson error")
+		}
+		suggestSysAlert.Action = monitor.SCALE_DOWN_DRIVER_ACTION
+		suggestSysAlert.MonitorConfig = jsonutils.Marshal(instance)
+		suggestSysAlert.Problem = describeEvalResultTojson(evalMatchsMap, mappingId, mappingVal)
+		serverArr.Add(jsonutils.Marshal(suggestSysAlert))
+	}
+	return serverArr, nil
+}
+
+func getServerFromEvalMatch(evalMatch *monitor.EvalMatch) (jsonutils.JSONObject, string, string) {
+	idTag := getMetricIdTag(evalMatch.Tags)
+	var server jsonutils.JSONObject
+	mappingId := ""
+	mappingVal := ""
+	for id, val := range idTag {
+		serverobj, err := getVm(val)
+		if err != nil {
+			continue
+		}
+		server = serverobj
+		mappingId = id
+		mappingVal = val
+		break
+	}
+	return server, mappingId, mappingVal
+}
+
+func describeEvalResultTojson(evalMatchsMap map[string][]*monitor.EvalMatch, mappingId, mappingVal string) jsonutils.JSONObject {
+	problem := jsonutils.NewDict()
+	for _, evalMatchs := range evalMatchsMap {
+		for _, evalMatch := range evalMatchs {
+			idTag := getMetricIdTag(evalMatch.Tags)
+			if val, ok := idTag[mappingId]; ok {
+				if val == mappingVal {
+					problem.Add(jsonutils.NewFloat(*evalMatch.Value), evalMatch.Metric)
+				}
+			}
+		}
+	}
+	return problem
+}
+
+func getVm(id string) (jsonutils.JSONObject, error) {
+	session := auth.GetAdminSession(context.Background(), "", "")
+	query := jsonutils.NewDict()
+	query.Add(jsonutils.NewString("0"), "limit")
+	query.Add(jsonutils.NewString("system"), "scope")
+	server, err := modules.Servers.GetById(session, id, query)
+	if err != nil {
+		return nil, err
+	}
+	return server, nil
+}
+
+func getMetricIdTag(tags map[string]string) map[string]string {
+	idTags := make(map[string]string, 0)
+	for key, val := range tags {
+		if strings.HasSuffix(key, "_id") {
+			idTags[key] = val
+		}
+	}
+	return idTags
+}
+
+func getAndEvalMatches(scaleEvalMatchs map[string][]*monitor.EvalMatch, andscaleEvalMatchs []*monitor.EvalMatch) []*monitor.EvalMatch {
+	for key, evalMatchs := range scaleEvalMatchs {
+		andscaleEvalMatchs = getAndEvalMatches_(evalMatchs, andscaleEvalMatchs)
+		if len(andscaleEvalMatchs) == 0 {
+			return andscaleEvalMatchs
+		}
+		scaleEvalMatchs[key] = getAndEvalMatches_(andscaleEvalMatchs, evalMatchs)
+	}
+	return andscaleEvalMatchs
+}
+
+//by first  param to scale other param's length
+func getAndEvalMatches_(scaleEvalMatchs, andscaleEvalMatchs []*monitor.EvalMatch) []*monitor.EvalMatch {
+	resEvalMatchs := make([]*monitor.EvalMatch, 0)
+	for _, evalMatch := range scaleEvalMatchs {
+		idTags := getMetricIdTag(evalMatch.Tags)
+		for _, andEvalMatch := range andscaleEvalMatchs {
+			andIdTags := getMetricIdTag(evalMatch.Tags)
+			for key, val := range idTags {
+				if andVal, ok := andIdTags[key]; ok {
+					if val == andVal {
+						resEvalMatchs = append(resEvalMatchs, andEvalMatch)
+						break
+					}
+				}
+			}
+		}
+	}
+	return resEvalMatchs
+}
+
+func (rule *ScaleDown) newAlertQuery(scale monitor.Scale) monitor.AlertQuery {
+	suggestSysRules, _ := models.SuggestSysRuleManager.GetRules(rule.GetType())
+	datasource, _ := models.DataSourceManager.GetDefaultSource()
+	return monitor.AlertQuery{
+		Model:        newMetricQuery(scale),
+		DataSourceId: datasource.Id,
+		From:         suggestSysRules[0].TimeFrom,
+		To:           "now",
+	}
+}
+
+func newMetricQuery(scale monitor.Scale) monitor.MetricQuery {
+	sels := make([]monitor.MetricQuerySelect, 0)
+	sels = append(sels, monitor.NewMetricQuerySelect(monitor.MetricQueryPart{Type: "field", Params: []string{scale.Field}}))
+	return monitor.MetricQuery{
+		Database:    scale.Database,
+		Measurement: scale.Measurement,
+		Selects:     sels,
+		GroupBy: []monitor.MetricQueryPart{
+			{
+				Type:   "field",
+				Params: []string{"*"},
+			},
+		},
+	}
+}
+
+func (rule *ScaleDown) StartResolveTask(ctx context.Context, userCred mcclient.TokenCredential,
+	suggestSysAlert *models.SSuggestSysAlert,
+	params *jsonutils.JSONDict) error {
+	log.Println("scaleDown StartResolveTask do nothing")
+	return nil
+}
+
+func (rule *ScaleDown) Resolve(data *models.SSuggestSysAlert) error {
+	log.Println("scaleDown Resolve do nothing")
+	return nil
+}