আমার অ্যাপ্লিকেশনটিতে, আমার কাছে একটি ক্যোয়ারী রয়েছে যা "ফাইল" সারণীতে একটি অনুসন্ধান সম্পাদন করে।
সারণি "ফাইলগুলি" "এফ" দ্বারা বিভক্ত করা হয়েছে। "তৈরি" (টেবিল সংজ্ঞা দেখুন এবং ক্লায়েন্টের জন্য ~ 26 মিলিয়ন সারি রয়েছে ("চ") "সিড = 19)।
এখানে কথাটি হ'ল, যদি আমি এই প্রশ্নটি করি:
SELECT "f"."id" AS "FileId"
, "f"."name" AS "FileName"
, "f"."year" AS "Fileyear"
, "f"."cid" AS "clientId"
, "f"."created" AS "FileDate"
, CASE WHEN ("vnVE0"."value" is not null AND "vnVE0"."value" != '')
THEN CAST("vnVE0"."value" AS decimal(28,2))
ELSE 0 END AS "keywordValueCol0_numeric"
FROM files "f"
OUTER APPLY
(
SELECT DISTINCT
VT.[value]
FROM dbo.value_number AS VT
WHERE
VT.id_file = F.id
AND VT.id_field = 260
) AS "vnVE0"
WHERE "grapado" IS NULL AND "masterversion" IS NULL AND ("f"."year" = 2013 OR "f"."year" = 0) AND "f"."cid" = 19
GROUP BY "f"."id", "f"."name", "f"."year", "f"."cid", "f"."created", CASE WHEN ("vnVE0"."value" is not null AND "vnVE0"."value" != '')
THEN CAST("vnVE0"."value" AS decimal(28,2))
ELSE 0 END
ORDER BY (SELECT NULL)
OFFSET 0 ROWS FETCH NEXT 50 ROWS ONLY;
নিম্নলিখিত পরীক্ষামূলক পরিকল্পনার সাথে আমি 0 সেকেন্ডে ফলাফল পেয়েছি: https://www.brentozar.com/pastetheplan/?id=SkV0-FDcG
তবে যদি আমি "নাম" দিয়ে অর্ডার দেওয়ার চেষ্টা করি তবে ক্যোয়ারীটি খুব ধীর হয়ে যায়:
SELECT "f"."id" AS "FileId"
, "f"."name" AS "FileName"
, "f"."year" AS "Fileyear"
, "f"."cid" AS "clientId"
, "f"."created" AS "FileDate"
, CASE WHEN ("vnVE0"."value" is not null AND "vnVE0"."value" != '')
THEN CAST("vnVE0"."value" AS decimal(28,2))
ELSE 0 END AS "keywordValueCol0_numeric"
FROM files "f"
OUTER APPLY
(
SELECT DISTINCT
VT.[value]
FROM dbo.value_number AS VT
WHERE
VT.id_file = F.id
AND VT.id_field = 260
) AS "vnVE0"
WHERE "grapado" IS NULL AND "masterversion" IS NULL AND ("f"."year" = 2013 OR "f"."year" = 0) AND "f"."cid" = 19
GROUP BY "f"."id", "f"."name", "f"."year", "f"."cid", "f"."created", CASE WHEN ("vnVE0"."value" is not null AND "vnVE0"."value" != '')
THEN CAST("vnVE0"."value" AS decimal(28,2))
ELSE 0 END
ORDER BY "f"."name"
OFFSET 0 ROWS FETCH NEXT 50 ROWS ONLY;
এই ক্যোয়ারীটি আমাকে কার্যকর করার পরিকল্পনার সাথে ফলাফলগুলি ফিরিয়ে আনতে 11 মিনিট সময় নেয়: https://www.brentozar.com/pastetheplan/?id=Sk3Fbtv9M
এছাড়াও, যদি আমি কলাম দ্বারা ক্রম পরিবর্তন করি, ফলাফল একই।
এক্সিকিউশন প্ল্যানে আপনি যেমন দেখতে পাচ্ছেন, সূচি "ফাইল_ এমভি" এর ব্যয় 61১%, এটি সূচকের সংজ্ঞা:
CREATE NONCLUSTERED INDEX [files_mv] ON [dbo].[files]
(
[masterversion] ASC,
[year] ASC,
[cat_id] ASC,
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[sub_id] ASC,
[tip_id] ASC
)
INCLUDE ( [id],
[name]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
GO
আমি অ্যাজুরি সহ এসকিউএল সার্ভার ব্যবহার করি। বিশেষত, মূল্য / মডেল স্তর "এস 4 এস্টেন্ডার (200 টিটিইউ)" সহ আজুর এসকিউএল ডেটাবেস।
আমি প্রচুর ডেটা পাচ্ছি তবে আমি মনে করি ইন্টারনেট সংযোগটি কোনও বাধা নয়, কারণ অন্যান্য অনুসন্ধানে আমি প্রচুর ডেটা পেয়েছি এবং সেগুলি দ্রুত।
এছাড়াও, আমি এই টেবিলগুলিতে বিশাল পরিমাণে তথ্য সন্নিবেশ করছি এবং কয়েকদিনের মধ্যে আমার কাছে ফাইল সারণীতে 240 মিলিয়ন ডলার সারি (এক সিডের জন্য) এবং মান_সংখ্য সারণীতে 480 মিলিয়ন ডলার সারি থাকবে।
অতিরিক্ত তথ্য
পার্টিটন ফাংশন "PF_files_partitioning":
CREATE PARTITION FUNCTION PF_files_partitioning (DATETIME2(7))
AS
RANGE LEFT FOR VALUES ( '2013-03-31 23:59:59',
'2013-06-30 23:59:59',
'2013-09-30 23:59:59',
'2013-12-31 23:59:59',
'2014-03-31 23:59:59',
'2014-06-30 23:59:59',
'2014-09-30 23:59:59',
'2014-12-31 23:59:59',
'2015-03-31 23:59:59',
'2015-06-30 23:59:59',
'2015-09-30 23:59:59',
'2015-12-31 23:59:59',
'2016-03-31 23:59:59',
'2016-06-30 23:59:59',
'2016-09-30 23:59:59',
'2016-12-31 23:59:59',
'2017-03-31 23:59:59',
'2017-06-30 23:59:59',
'2017-09-30 23:59:59',
'2017-12-31 23:59:59',
'2018-03-31 23:59:59')
পার্টিশন স্কিম "PS_files_partitioning":
CREATE PARTITION SCHEME PS_files_partitioning AS PARTITION PF_files_partitioning ALL TO ([PRIMARY]);
** প্রতিটি বিভাজনে আমার প্রায় 15 মিলিয়ন সারি থাকবে।
ফাইল টেবিল:
CREATE TABLE [dbo].[files](
[id] [bigint] IDENTITY(1,1) NOT NULL,
[cid] [tinyint] NOT NULL,
[eid] [bigint] NOT NULL,
[cat_id] [bigint] NOT NULL,
[tip_id] [bigint] NULL,
[sub_id] [bigint] NULL,
[year] [smallint] NOT NULL,
[caducidad] [smallint] NULL,
[grapadopri] [int] NOT NULL,
[grapado] [bigint] NULL,
[name] [nvarchar](255) NOT NULL,
[extension] [tinyint] NOT NULL,
[size] [bigint] NOT NULL,
[id_doc] [bit] NOT NULL,
[observaciones] [nvarchar](255) NOT NULL,
[indexed] [bit] NOT NULL,
[signed] [bit] NOT NULL,
[created] [datetime2](7) NOT NULL,
[name_lower] [nvarchar](255) NOT NULL,
[modified] [datetime2](7) NULL,
[related] [bit] NOT NULL,
[masterversion] [bigint] NULL,
[versioned] [bit] NOT NULL,
[hwsignature] [tinyint] NOT NULL,
[blockedUserId] [smallint] NULL,
CONSTRAINT [PK_files_id] PRIMARY KEY CLUSTERED
(
[id] ASC,
[created] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created]),
CONSTRAINT [files$estructure_unique] UNIQUE NONCLUSTERED
(
[cat_id] ASC,
[tip_id] ASC,
[sub_id] ASC,
[year] ASC,
[name] ASC,
[grapado] ASC,
[created] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)
মান_সংখ্যার সারণী:
CREATE TABLE [dbo].[value_number](
[id] [bigint] IDENTITY(1,1) NOT NULL,
[id_file] [bigint] NOT NULL DEFAULT ((0)),
[id_field] [bigint] NOT NULL DEFAULT ((0)),
[value] [nvarchar](255) NULL DEFAULT (NULL),
[id_doc] [bigint] NULL DEFAULT (NULL)
CONSTRAINT [PK_value_number_id] PRIMARY KEY CLUSTERED
(
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)
ফাইল টেবিলের সূচি
CREATE NONCLUSTERED INDEX [files_clientes] ON [dbo].[files]
(
[cid] ASC
)
INCLUDE ([id]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [files_grapado] ON [dbo].[files]
(
[grapado] ASC
)
INCLUDE ( [id],
[name]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [files_mv] ON [dbo].[files]
(
[masterversion] ASC,
[year] ASC,
[cat_id] ASC,
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[sub_id] ASC,
[tip_id] ASC
)
INCLUDE ( [id],
[name]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [files_ocr] ON [dbo].[files]
(
[cid] ASC,
[grapado] ASC,
[indexed] ASC,
[masterversion] ASC,
[extension] ASC
)
INCLUDE ( [id],
[eid],
[cat_id],
[tip_id],
[sub_id],
[year],
[name]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [files_ocr2] ON [dbo].[files]
(
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[indexed] ASC,
[masterversion] ASC,
[extension] ASC
)
INCLUDE ( [id],
[cat_id],
[tip_id],
[sub_id],
[year],
[name]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [files_ocr3] ON [dbo].[files]
(
[cid] ASC,
[cat_id] ASC,
[grapado] ASC,
[indexed] ASC,
[masterversion] ASC,
[extension] ASC
)
INCLUDE ( [eid],
[tip_id],
[sub_id],
[year],
[name]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [busqueda_name] ON [dbo].[files]
(
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[year] ASC
)
INCLUDE ( [id],
[cat_id],
[tip_id],
[sub_id],
[grapadopri],
[name],
[size],
[id_doc],
[signed],
[created],
[modified],
[related],
[masterversion]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [busqueda2] ON [dbo].[files]
(
[cid] ASC,
[eid] ASC,
[cat_id] ASC,
[grapado] ASC,
[masterversion] ASC,
[year] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [cid] ON [dbo].[files]
(
[cid] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [eid] ON [dbo].[files]
(
[eid] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [extension] ON [dbo].[files]
(
[extension] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [FK_files_archivo] ON [dbo].[files]
(
[grapado] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [FK_files_tipo] ON [dbo].[files]
(
[tip_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [grapadopri] ON [dbo].[files]
(
[grapadopri] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [index_all] ON [dbo].[files]
(
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[masterversion] ASC
)
INCLUDE ( [cat_id],
[tip_id],
[sub_id],
[year],
[grapadopri],
[name],
[size],
[id_doc],
[signed],
[created],
[modified],
[related],
[versioned]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [missing_index_7_6] ON [dbo].[files]
(
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[name] ASC,
[year] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [ocrCloudClients] ON [dbo].[files]
(
[grapado] ASC,
[indexed] ASC,
[extension] ASC
)
INCLUDE ( [cid],
[eid],
[cat_id],
[tip_id],
[sub_id]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [searchEntity] ON [dbo].[files]
(
[cid] ASC,
[eid] ASC,
[grapado] ASC,
[masterversion] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
CREATE NONCLUSTERED INDEX [sub_id] ON [dbo].[files]
(
[sub_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON PS_files_partitioning([created])
মান_সংখ্য সারণীর সূচি
CREATE NONCLUSTERED INDEX [searchValues] ON [dbo].[value_number]
(
[id_field] ASC
)
INCLUDE ( [id_file],
[value]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
CREATE NONCLUSTERED INDEX [search] ON [dbo].[value_number]
(
[id_file] ASC,
[id_field] ASC
)
INCLUDE ( [value]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
CREATE NONCLUSTERED INDEX [id_field] ON [dbo].[value_number]
(
[id_field] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
CREATE NONCLUSTERED INDEX [FK_valueesN_documento] ON [dbo].[value_number]
(
[id_doc] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
CREATE NONCLUSTERED INDEX [FK_valueesN_archivo] ON [dbo].[value_number]
(
[id_file] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
পরিসংখ্যান আপ টু ডেট। আমি বছরের জন্য এবং অন্যান্য কলামগুলির জন্য ডেটা ধরণের পরিবর্তন করেছি এবং এখন পারফরম্যান্সটি আরও ভাল বলে মনে হচ্ছে, তবে কার্যকর করার পরিকল্পনাটি এখনও একই। আমি কার্ডিনালিটি এসটিমেশন (পরিবর্তন সূচক) ঠিক করার চেষ্টা করছি, তবে আমার এখনও সফলতা হয়নি। অ্যাজুর ডকুমেন্টেশন অনুসারে ডাটাবেসে আমার 130 টি সামঞ্জস্যতার স্তর থাকা উচিত এবং প্রোডাক্ট ভার্সন 12.0 এর সাথে আমার 100 টি ইতিমধ্যে রয়েছে।