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https://codeberg.org/forgejo/forgejo.git
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3ce1a09736
- Databases are one of the most important parts of Forgejo, every interaction with Forgejo uses the database in one way or another. Therefore, it is important to maintain the database and recognize when Forgejo is not doing well with the database. Forgejo already has the option to log *every* SQL query along with its execution time, but monitoring becomes impractical for larger instances and takes up unnecessary storage in the logs. - Add a QoL enhancement that allows instance administrators to specify a threshold value beyond which query execution time is logged as a warning in the xorm logger. The default value is a conservative five seconds to avoid this becoming a source of spam in the logs. - The use case for this patch is that with an instance the size of Codeberg, monitoring SQL logs is not very fruitful and most of them are uninteresting. Recently, in the context of persistent deadlock issues (https://codeberg.org/forgejo/forgejo/issues/220), I have noticed that certain queries hold locks on tables like comment and issue for several seconds. This patch helps to identify which queries these are and when they happen. - Added unit test. (cherry picked from commit24bbe7886f) (cherry picked from commit6e29145b3c) (cherry picked from commit63731e3071)
126 lines
3.5 KiB
Go
126 lines
3.5 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package db_test
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import (
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"path/filepath"
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"testing"
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"time"
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"code.gitea.io/gitea/models/db"
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issues_model "code.gitea.io/gitea/models/issues"
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"code.gitea.io/gitea/models/unittest"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/test"
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_ "code.gitea.io/gitea/cmd" // for TestPrimaryKeys
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"github.com/stretchr/testify/assert"
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"xorm.io/xorm"
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)
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func TestDumpDatabase(t *testing.T) {
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assert.NoError(t, unittest.PrepareTestDatabase())
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dir := t.TempDir()
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type Version struct {
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ID int64 `xorm:"pk autoincr"`
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Version int64
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}
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assert.NoError(t, db.GetEngine(db.DefaultContext).Sync(new(Version)))
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for _, dbType := range setting.SupportedDatabaseTypes {
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assert.NoError(t, db.DumpDatabase(filepath.Join(dir, dbType+".sql"), dbType))
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}
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}
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func TestDeleteOrphanedObjects(t *testing.T) {
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assert.NoError(t, unittest.PrepareTestDatabase())
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countBefore, err := db.GetEngine(db.DefaultContext).Count(&issues_model.PullRequest{})
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assert.NoError(t, err)
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_, err = db.GetEngine(db.DefaultContext).Insert(&issues_model.PullRequest{IssueID: 1000}, &issues_model.PullRequest{IssueID: 1001}, &issues_model.PullRequest{IssueID: 1003})
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assert.NoError(t, err)
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orphaned, err := db.CountOrphanedObjects(db.DefaultContext, "pull_request", "issue", "pull_request.issue_id=issue.id")
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assert.NoError(t, err)
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assert.EqualValues(t, 3, orphaned)
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err = db.DeleteOrphanedObjects(db.DefaultContext, "pull_request", "issue", "pull_request.issue_id=issue.id")
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assert.NoError(t, err)
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countAfter, err := db.GetEngine(db.DefaultContext).Count(&issues_model.PullRequest{})
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assert.NoError(t, err)
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assert.EqualValues(t, countBefore, countAfter)
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}
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func TestPrimaryKeys(t *testing.T) {
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// Some dbs require that all tables have primary keys, see
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// https://github.com/go-gitea/gitea/issues/21086
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// https://github.com/go-gitea/gitea/issues/16802
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// To avoid creating tables without primary key again, this test will check them.
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// Import "code.gitea.io/gitea/cmd" to make sure each db.RegisterModel in init functions has been called.
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beans, err := db.NamesToBean()
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if err != nil {
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t.Fatal(err)
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}
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whitelist := map[string]string{
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"the_table_name_to_skip_checking": "Write a note here to explain why",
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"forgejo_sem_ver": "seriously dude",
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}
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for _, bean := range beans {
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table, err := db.TableInfo(bean)
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if err != nil {
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t.Fatal(err)
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}
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if why, ok := whitelist[table.Name]; ok {
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t.Logf("ignore %q because %q", table.Name, why)
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continue
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}
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if len(table.PrimaryKeys) == 0 {
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t.Errorf("table %q has no primary key", table.Name)
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}
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}
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}
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func TestSlowQuery(t *testing.T) {
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lc, cleanup := test.NewLogChecker("slow-query")
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lc.StopMark("[Slow SQL Query]")
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defer cleanup()
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e := db.GetEngine(db.DefaultContext)
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engine, ok := e.(*xorm.Engine)
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assert.True(t, ok)
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// It's not possible to clean this up with XORM, but it's luckily not harmful
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// to leave around.
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engine.AddHook(&db.SlowQueryHook{
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Treshold: time.Second * 10,
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Logger: log.GetLogger("slow-query"),
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})
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// NOOP query.
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e.Exec("SELECT 1 WHERE false;")
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_, stopped := lc.Check(100 * time.Millisecond)
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assert.False(t, stopped)
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engine.AddHook(&db.SlowQueryHook{
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Treshold: 0, // Every query should be logged.
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Logger: log.GetLogger("slow-query"),
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})
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// NOOP query.
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e.Exec("SELECT 1 WHERE false;")
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_, stopped = lc.Check(100 * time.Millisecond)
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assert.True(t, stopped)
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}
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