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refactor: consolidate database pools (#9105)

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# Which Problems Are Solved

Zitadel currently uses 3 database pool, 1 for queries, 1 for pushing
events and 1 for scheduled projection updates. This defeats the purpose
of a connection pool which already handles multiple connections.

During load tests we found that the current structure of connection
pools consumes a lot of database resources. The resource usage dropped
after we reduced the amount of database pools to 1 because existing
connections can be used more efficiently.

# How the Problems Are Solved

Removed logic to handle multiple connection pools and use a single one.

# Additional Changes

none

# Additional Context

part of https://github.com/zitadel/zitadel/issues/8352
This commit is contained in:
Silvan
2025-01-16 12:07:18 +01:00
committed by GitHub
parent 07f74730ac
commit 4645045987
21 changed files with 104 additions and 564 deletions
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9
cmd/setup/cleanup.go
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@@ -8,7 +8,6 @@ import (
"github.com/zitadel/logging"
"github.com/zitadel/zitadel/internal/database"
"github.com/zitadel/zitadel/internal/database/dialect"
"github.com/zitadel/zitadel/internal/eventstore"
old_es "github.com/zitadel/zitadel/internal/eventstore/repository/sql"
new_es "github.com/zitadel/zitadel/internal/eventstore/v3"
@@ -32,13 +31,11 @@ func Cleanup(config *Config) {
logging.Info("cleanup started")
queryDBClient, err := database.Connect(config.Database, false, dialect.DBPurposeQuery)
logging.OnError(err).Fatal("unable to connect to database")
esPusherDBClient, err := database.Connect(config.Database, false, dialect.DBPurposeEventPusher)
dbClient, err := database.Connect(config.Database, false)
logging.OnError(err).Fatal("unable to connect to database")
config.Eventstore.Pusher = new_es.NewEventstore(esPusherDBClient)
config.Eventstore.Querier = old_es.NewCRDB(queryDBClient)
config.Eventstore.Pusher = new_es.NewEventstore(dbClient)
config.Eventstore.Querier = old_es.NewCRDB(dbClient)
es := eventstore.NewEventstore(config.Eventstore)
step, err := migration.LastStuckStep(ctx, es)