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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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5
cmd/mirror/event_store.go
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@@ -14,7 +14,6 @@ import (
"github.com/zitadel/logging"
db "github.com/zitadel/zitadel/internal/database"
"github.com/zitadel/zitadel/internal/database/dialect"
"github.com/zitadel/zitadel/internal/id"
"github.com/zitadel/zitadel/internal/v2/database"
"github.com/zitadel/zitadel/internal/v2/eventstore"
@@ -44,11 +43,11 @@ Migrate only copies events2 and unique constraints`,
}
func copyEventstore(ctx context.Context, config *Migration) {
sourceClient, err := db.Connect(config.Source, false, dialect.DBPurposeEventPusher)
sourceClient, err := db.Connect(config.Source, false)
logging.OnError(err).Fatal("unable to connect to source database")
defer sourceClient.Close()
destClient, err := db.Connect(config.Destination, false, dialect.DBPurposeEventPusher)
destClient, err := db.Connect(config.Destination, false)
logging.OnError(err).Fatal("unable to connect to destination database")
defer destClient.Close()