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Using batched updates to reduce lock

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Cy Okeke
2025-11-17 15:54:56 +01:00
parent 1869508951
commit cd37d88a72
1 changed files with 48 additions and 8 deletions
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56
util/Migrator/DbScripts/2025-11-14_00_PopulateMaxStorageGbIncreased.sql
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@@ -1,13 +1,53 @@
-- Populate MaxStorageGbIncreased for Users
-- Populate MaxStorageGbIncreased for Users in batches
-- Set MaxStorageGbIncreased = MaxStorageGb + 4 for all users with storage quota
UPDATE [dbo].[User]
SET [MaxStorageGbIncreased] = [MaxStorageGb] + 4
WHERE [MaxStorageGb] IS NOT NULL;
-- Using batched updates to reduce lock contention and transaction log impact
DECLARE @BatchSize INT = 5000;
DECLARE @RowsAffected INT = 1;
DECLARE @TotalUpdated INT = 0;
PRINT 'Starting User table update...';
WHILE @RowsAffected > 0
BEGIN
UPDATE TOP (@BatchSize) [dbo].[User]
SET [MaxStorageGbIncreased] = [MaxStorageGb] + 4
WHERE [MaxStorageGb] IS NOT NULL
AND [MaxStorageGbIncreased] IS NULL; -- Only update rows not yet processed
SET @RowsAffected = @@ROWCOUNT;
SET @TotalUpdated = @TotalUpdated + @RowsAffected;
PRINT 'Users updated: ' + CAST(@TotalUpdated AS VARCHAR(10));
WAITFOR DELAY '00:00:00.100'; -- 100ms delay to reduce contention
END
PRINT 'User table update complete. Total rows updated: ' + CAST(@TotalUpdated AS VARCHAR(10));
GO
-- Populate MaxStorageGbIncreased for Organizations
-- Populate MaxStorageGbIncreased for Organizations in batches
-- Set MaxStorageGbIncreased = MaxStorageGb + 4 for all organizations with storage quota
UPDATE [dbo].[Organization]
SET [MaxStorageGbIncreased] = [MaxStorageGb] + 4
WHERE [MaxStorageGb] IS NOT NULL;
-- Using batched updates to reduce lock contention and transaction log impact
DECLARE @BatchSize INT = 5000;
DECLARE @RowsAffected INT = 1;
DECLARE @TotalUpdated INT = 0;
PRINT 'Starting Organization table update...';
WHILE @RowsAffected > 0
BEGIN
UPDATE TOP (@BatchSize) [dbo].[Organization]
SET [MaxStorageGbIncreased] = [MaxStorageGb] + 4
WHERE [MaxStorageGb] IS NOT NULL
AND [MaxStorageGbIncreased] IS NULL; -- Only update rows not yet processed
SET @RowsAffected = @@ROWCOUNT;
SET @TotalUpdated = @TotalUpdated + @RowsAffected;
PRINT 'Organizations updated: ' + CAST(@TotalUpdated AS VARCHAR(10));
WAITFOR DELAY '00:00:00.100'; -- 100ms delay to reduce contention
END
PRINT 'Organization table update complete. Total rows updated: ' + CAST(@TotalUpdated AS VARCHAR(10));
GO