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limit number of rows deleted by dashboard version cleanup

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This commit is contained in:
Alexander Zobnin
2018-03-21 20:26:27 +03:00
parent fc2d1d6ca9
commit f976b690ca
1 changed files with 19 additions and 34 deletions
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53
pkg/services/sqlstore/dashboard_version.go
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@@ -2,6 +2,7 @@ package sqlstore
import (
"fmt"
"strings"
"github.com/grafana/grafana/pkg/bus"
m "github.com/grafana/grafana/pkg/models"
@@ -69,6 +70,8 @@ func GetDashboardVersions(query *m.GetDashboardVersionsQuery) error {
func DeleteExpiredVersions(cmd *m.DeleteExpiredVersionsCommand) error {
return inTransaction(func(sess *DBSession) error {
const MAX_VERSIONS_TO_DELETE = 100
versionsToKeep := setting.DashboardVersionsToKeep
if versionsToKeep < 1 {
versionsToKeep = 1
@@ -83,12 +86,25 @@ func DeleteExpiredVersions(cmd *m.DeleteExpiredVersionsCommand) error {
SELECT dashboard_id, count(version) as count, min(version) as min
FROM dashboard_version
GROUP BY dashboard_id
) AS vtd
WHERE dashboard_version.dashboard_id=vtd.dashboard_id
) AS vtd
WHERE dashboard_version.dashboard_id=vtd.dashboard_id
AND version < vtd.min + vtd.count - %v`
versionIdsToDeleteSubquery := fmt.Sprintf(versionIdsToDeleteSybqueryTemplate, versionsToKeep)
deleteExpiredSql := fmt.Sprintf(`DELETE FROM dashboard_version WHERE id IN (%s)`, versionIdsToDeleteSubquery)
versions := []string{}
err := sess.SQL(versionIdsToDeleteSubquery).Find(&versions)
if err != nil {
return err
}
// Don't delete more than MAX_VERSIONS_TO_DELETE version per time
limit := MAX_VERSIONS_TO_DELETE
if len(versions) < MAX_VERSIONS_TO_DELETE {
limit = len(versions)
}
versions = versions[:limit]
deleteExpiredSql := fmt.Sprintf(`DELETE FROM dashboard_version WHERE id IN (%s)`, strings.Join(versions, `,`))
expiredResponse, err := sess.Exec(deleteExpiredSql)
if err != nil {
return err
@@ -98,34 +114,3 @@ func DeleteExpiredVersions(cmd *m.DeleteExpiredVersionsCommand) error {
return nil
})
}
// Short version of DashboardVersion for getting expired versions
type DashboardVersionExp struct {
Id int64 `json:"id"`
DashboardId int64 `json:"dashboardId"`
Version int `json:"version"`
}
func getVersionIDsToDelete(versions []DashboardVersionExp, versionsToKeep int) []interface{} {
versionIds := make([]interface{}, 0)
if len(versions) == 0 {
return versionIds
}
currentDashboard := versions[0].DashboardId
count := 0
for _, v := range versions {
if v.DashboardId == currentDashboard {
count++
} else {
count = 1
currentDashboard = v.DashboardId
}
if count > versionsToKeep {
versionIds = append(versionIds, v.Id)
}
}
return versionIds
}