fix: removing restriction of connection pool size for bulk import

Author: tamassoltesz

CHANGELOG.md

@@ -7,6 +7,8 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+- Unrestricts the connection pool size for the Bulk Import 
+
 ## [7.1.0] - 2024-04-25
 
 - Adds queries for Bulk Import

src/main/java/io/supertokens/storage/postgresql/BulkImportProxyStorage.java

@@ -48,7 +48,7 @@ public synchronized Connection getTransactionConnection() throws SQLException, S
         if (this.connection == null) {
             Connection con = ConnectionPool.getConnectionForProxyStorage(this);
             this.connection = new BulkImportProxyConnection(con);
-            connection.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);
+            connection.setTransactionIsolation(Connection.TRANSACTION_REPEATABLE_READ);
             connection.setAutoCommit(false);
         }
         return this.connection;
@@ -66,15 +66,6 @@ public void commitTransaction(TransactionConnection con) throws StorageQueryExce
         // if any query fails while importing the user
     }
 
-    @Override
-    public void loadConfig(JsonObject configJson, Set<LOG_LEVEL> logLevels, TenantIdentifier tenantIdentifier)
-            throws InvalidConfigException {
-        // We are overriding the loadConfig method to set the connection pool size
-        // to 1 to avoid creating many connections for the bulk import cronjob
-        configJson.addProperty("postgresql_connection_pool_size", 1);
-        super.loadConfig(configJson, logLevels, tenantIdentifier);
-    }
-
     @Override
     public void initStorage(boolean shouldWait, List<TenantIdentifier> tenantIdentifiers) throws DbInitException {
         super.initStorage(shouldWait, tenantIdentifiers);