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[performance] retry db queries on busy errors (#2025)

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* catch SQLITE_BUSY errors, wrap bun.DB to use our own busy retrier, remove unnecessary db.Error type

Signed-off-by: kim <grufwub@gmail.com>

* remove dead code

Signed-off-by: kim <grufwub@gmail.com>

* remove more dead code, add missing error arguments

Signed-off-by: kim <grufwub@gmail.com>

* update sqlite to use maxOpenConns()

Signed-off-by: kim <grufwub@gmail.com>

* add uncommitted changes

Signed-off-by: kim <grufwub@gmail.com>

* use direct calls-through for the ConnIface to make sure we don't double query hook

Signed-off-by: kim <grufwub@gmail.com>

* expose underlying bun.DB better

Signed-off-by: kim <grufwub@gmail.com>

* retry on the correct busy error

Signed-off-by: kim <grufwub@gmail.com>

* use longer possible maxRetries for db retry-backoff

Signed-off-by: kim <grufwub@gmail.com>

* remove the note regarding max-open-conns only applying to postgres

Signed-off-by: kim <grufwub@gmail.com>

* improved code commenting

Signed-off-by: kim <grufwub@gmail.com>

* remove unnecessary infof call (just use info)

Signed-off-by: kim <grufwub@gmail.com>

* rename DBConn to WrappedDB to better follow sql package name conventions

Signed-off-by: kim <grufwub@gmail.com>

* update test error string checks

Signed-off-by: kim <grufwub@gmail.com>

* shush linter

Signed-off-by: kim <grufwub@gmail.com>

* update backoff logic to be more transparent

Signed-off-by: kim <grufwub@gmail.com>

---------

Signed-off-by: kim <grufwub@gmail.com>
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kim 2023-07-25 09:34:05 +01:00 • committed by GitHub
commit 5f3e095717
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53 changed files with 1050 additions and 898 deletions
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15
internal/db/bundb/session.go
View file

@ -22,26 +22,25 @@ import (
"crypto/rand"
"io"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
)
type sessionDB struct {
conn *DBConn
db *WrappedDB
}
func (s *sessionDB) GetSession(ctx context.Context) (*gtsmodel.RouterSession, db.Error) {
func (s *sessionDB) GetSession(ctx context.Context) (*gtsmodel.RouterSession, error) {
rss := make([]*gtsmodel.RouterSession, 0, 1)
// get the first router session in the db or...
if err := s.conn.
if err := s.db.
NewSelect().
Model(&rss).
Limit(1).
Order("router_session.id DESC").
Scan(ctx); err != nil {
return nil, s.conn.ProcessError(err)
return nil, s.db.ProcessError(err)
}
// ... create a new one
@ -52,7 +51,7 @@ func (s *sessionDB) GetSession(ctx context.Context) (*gtsmodel.RouterSession, db
return rss[0], nil
}
func (s *sessionDB) createSession(ctx context.Context) (*gtsmodel.RouterSession, db.Error) {
func (s *sessionDB) createSession(ctx context.Context) (*gtsmodel.RouterSession, error) {
buf := make([]byte, 64)
auth := buf[:32]
crypt := buf[32:64]
@ -67,11 +66,11 @@ func (s *sessionDB) createSession(ctx context.Context) (*gtsmodel.RouterSession,
Crypt: crypt,
}
if _, err := s.conn.
if _, err := s.db.
NewInsert().
Model(rs).
Exec(ctx); err != nil {
return nil, s.conn.ProcessError(err)
return nil, s.db.ProcessError(err)
}
return rs, nil