-
-
Notifications
You must be signed in to change notification settings - Fork 794
/
Test-DbaDbCompression.ps1
649 lines (557 loc) · 26.2 KB
/
Test-DbaDbCompression.ps1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
function Test-DbaDbCompression {
<#
.SYNOPSIS
Returns tables and indexes with preferred compression setting.
.DESCRIPTION
This function returns the results of a full table/index compression analysis and the estimated, best option to date for either NONE, Page, or Row Compression.
Remember Uptime is critical, the longer uptime, the more accurate the analysis is, and it would be best if you utilized Get-DbaUptime first, before running this command.
Test-DbaDbCompression script derived from GitHub and the Tiger Team's repository: (https://github.com/Microsoft/tigertoolbox/tree/master/Evaluate-Compression-Gains)
In the output, you will find the following information:
- Column Percent_Update shows the percentage of update operations on a specific table, index, or partition, relative to total operations on that object. The lower the percentage of Updates (that is, the table, index, or partition is infrequently updated), the better candidate it is for page compression.
- Column Percent_Scan shows the percentage of scan operations on a table, index, or partition, relative to total operations on that object. The higher the value of Scan (that is, the table, index, or partition is mostly scanned), the better candidate it is for page compression.
- Column Compression_Type_Recommendation can have four possible outputs indicating where there is most gain, if any: 'PAGE', 'ROW', 'NO_GAIN' or '?'. When the output is '?' this approach could not give a recommendation, so as a rule of thumb I would lean to ROW if the object suffers mainly UPDATES, or PAGE if mainly INSERTS, but this is where knowing your workload is essential. When the output is 'NO_GAIN' well, that means that according to sp_estimate_data_compression_savings no space gains will be attained when compressing, as in the above output example, where compressing would grow the affected object.
This script will execute on the context of the current database.
Also be aware that this may take a while to execute on large objects, because if the IS locks taken by the
sp_estimate_data_compression_savings cannot be honored, the SP will be blocked.
It only considers Row or Page Compression (not column compression)
It only evaluates User Tables
.PARAMETER SqlInstance
The target SQL Server instance or instances. This can be a collection and receive pipeline input to allow the function to be executed against multiple SQL Server instances.
.PARAMETER SqlCredential
Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported.
For MFA support, please use Connect-DbaInstance.
.PARAMETER Database
The database(s) to process - this list is auto-populated from the server. If unspecified, all databases will be processed.
.PARAMETER ExcludeDatabase
The database(s) to exclude - this list is auto-populated from the server
.PARAMETER Schema
Filter to only get specific schemas If unspecified, all schemas will be processed.
.PARAMETER Table
Filter to only get specific tables If unspecified, all User tables will be processed.
.PARAMETER ResultSize
Allows you to limit the number of results returned, as some systems can have very large number of tables. Default value is no restriction.
.PARAMETER Rank
Allows you to specify the field used for ranking when determining the ResultSize
Can be either TotalPages, UsedPages or TotalRows with default of TotalPages. Only applies when ResultSize is used.
.PARAMETER FilterBy
Allows you to specify level of filtering when determining the ResultSize
Can be at either Table, Index or Partition level with default of Partition. Only applies when ResultSize is used.
.PARAMETER EnableException
By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
.INPUTS
Accepts a DbaInstanceParameter. Any collection of SQL Server Instance names or SMO objects can be piped to command.
.OUTPUTS
Returns a PSCustomObject with following fields: ComputerName, InstanceName, SqlInstance, Database, IndexName, Partition, IndexID, PercentScan, PercentUpdate, RowEstimatePercentOriginal, PageEstimatePercentOriginal, CompressionTypeRecommendation, SizeCurrent, SizeRequested, PercentCompression
.NOTES
Tags: Compression, Table
Author: Jason Squires (@js_0505), jstexasdba@gmail.com
Website: https://dbatools.io
Copyright: (c) 2018 by dbatools, licensed under MIT
License: MIT https://opensource.org/licenses/MIT
.LINK
https://dbatools.io/Test-DbaDbCompression
.EXAMPLE
PS C:\> Test-DbaDbCompression -SqlInstance localhost
Returns results of all potential compression options for all databases for the default instance on the local host. Returns a recommendation of either Page, Row or NO_GAIN
.EXAMPLE
PS C:\> Test-DbaDbCompression -SqlInstance ServerA
Returns results of all potential compression options for all databases on the instance ServerA
.EXAMPLE
PS C:\> Test-DbaDbCompression -SqlInstance ServerA -Database DBName | Out-GridView
Returns results of all potential compression options for a single database DBName with the recommendation of either Page or Row or NO_GAIN in a nicely formatted GridView
.EXAMPLE
PS C:\> $cred = Get-Credential sqladmin
PS C:\> Test-DbaDbCompression -SqlInstance ServerA -ExcludeDatabase MyDatabase -SqlCredential $cred
Returns results of all potential compression options for all databases except MyDatabase on instance ServerA using SQL credentials to authentication to ServerA.
Returns the recommendation of either Page, Row or NO_GAIN
.EXAMPLE
PS C:\> Test-DbaDbCompression -SqlInstance ServerA -Schema Test -Table MyTable
Returns results of all potential compression options for the Table Test.MyTable in instance ServerA on ServerA and ServerB.
Returns the recommendation of either Page, Row or NO_GAIN.
Returns a result for each partition of any Heap, Clustered or NonClustered index.
.EXAMPLE
PS C:\> Test-DbaDbCompression -SqlInstance ServerA, ServerB -ResultSize 10
Returns results of all potential compression options for all databases on ServerA and ServerB.
Returns the recommendation of either Page, Row or NO_GAIN.
Returns results for the top 10 partitions by TotalPages used per database.
.EXAMPLE
PS C:\> ServerA | Test-DbaDbCompression -Schema Test -ResultSize 10 -Rank UsedPages -FilterBy Table
Returns results of all potential compression options for all databases on ServerA containing a schema Test
Returns results for the top 10 Tables by Used Pages per database.
Results are split by Table, Index and Partition so more than 10 results may be returned.
.EXAMPLE
PS C:\> $servers = 'Server1','Server2'
PS C:\> $servers | Test-DbaDbCompression -Database DBName | Out-GridView
Returns results of all potential compression options for a single database DBName on Server1 or Server2
Returns the recommendation of either Page, Row or NO_GAIN in a nicely formatted GridView
.EXAMPLE
PS C:\> $cred = Get-Credential sqladmin
PS C:\> Test-DbaDbCompression -SqlInstance ServerA -Database MyDB -SqlCredential $cred -Schema Test -Table Test1, Test2
Returns results of all potential compression options for objects in Database MyDb on instance ServerA using SQL credentials to authentication to ServerA.
Returns the recommendation of either Page, Row or NO_GAIN for tables with Schema Test and name in Test1 or Test2
.EXAMPLE
PS C:\> $servers = 'Server1','Server2'
PS C:\> foreach ($svr in $servers) {
>> Test-DbaDbCompression -SqlInstance $svr | Export-Csv -Path C:\temp\CompressionAnalysisPAC.csv -Append
>> }
This produces a full analysis of all your servers listed and is pushed to a csv for you to analyze.
#>
[CmdletBinding(DefaultParameterSetName = "Default")]
param (
[parameter(Mandatory, ValueFromPipeline)]
[DbaInstanceParameter[]]$SqlInstance,
[PSCredential]$SqlCredential,
[string[]]$Database,
[string[]]$ExcludeDatabase,
[string[]]$Schema,
[string[]]$Table,
[int]$ResultSize,
[ValidateSet('TotalPages', 'UsedPages', 'TotalRows')]
[string]$Rank = 'TotalPages',
[ValidateSet('Partition', 'Index', 'Table')]
[string]$FilterBy = 'Partition',
[switch]$EnableException
)
begin {
Write-Message -Level System -Message "Bound parameters: $($PSBoundParameters.Keys -join ", ")"
if ($Schema) {
$sqlSchemaWhere = "AND s.name IN ('$($Schema -join "','")')"
}
if ($Table) {
$sqlTableWhere = "AND t.name IN ('$($Table -join "','")')"
}
if ($ResultSize) {
$sqlOrderBy = switch ($Rank) {
UsedPages { 'UsedSpaceKB' }
TotalRows { 'RowCounts' }
default { 'TotalSpaceKB' }
}
if ($FilterBy -eq 'Table') {
$sqlJoinFiltered = 'AND t.TableName = tdc.TableName COLLATE DATABASE_DEFAULT'
$indexSQL = '0 as [IndexID]'
$partitionSQL = '0 AS [Partition]'
$groupBySQL = 's.Name, t.Name'
} elseif ($FilterBy -eq 'Index') {
$sqlJoinFiltered = 'AND t.TableName = tdc.TableName COLLATE DATABASE_DEFAULT AND t.IndexID = tdc.IndexID'
$indexSQL = 'i.index_id as [IndexID]'
$partitionSQL = '0 AS [Partition]'
$groupBySQL = 's.Name, t.Name, i.index_id'
} else {
$sqlJoinFiltered = 'AND t.TableName = tdc.TableName COLLATE DATABASE_DEFAULT AND t.IndexID = tdc.IndexID AND t.[Partition] = tdc.[Partition]'
$indexSQL = 'i.index_id as [IndexID]'
$partitionSQL = 'p.partition_number AS [Partition]'
$groupBySQL = 's.Name, t.Name, i.index_id, p.partition_number'
}
$sqlRestrict = "-- remove tables not in Top N
With TopN(SchemaName, TableName, IndexID, [Partition], RowCounts, TotalSpaceKB, UsedSpaceKB) as
(
SELECT TOP $ResultSize
s.Name AS SchemaName,
t.NAME as TableName,
$indexSQL,
$partitionSQL,
SUM(p.rows) AS RowCounts,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
SUM(a.used_pages) * 8 AS UsedSpaceKB
FROM
sys.tables t
INNER JOIN
sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN
sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN
sys.allocation_units a ON p.partition_id = a.container_id
LEFT OUTER JOIN
sys.schemas s ON t.schema_id = s.schema_id
WHERE objectproperty(t.object_id, 'IsUserTable') = 1
AND p.data_compression_desc = 'NONE'
AND p.rows > 0
$sqlSchemaWhere
$sqlTableWhere
GROUP BY
$groupBySQL
ORDER BY
$sqlOrderBy Desc
)
DELETE tdc
FROM ##TestDbaCompression tdc
LEFT JOIN TopN t
ON t.SchemaName = tdc.[Schema] COLLATE DATABASE_DEFAULT
$sqlJoinFiltered
WHERE t.IndexID IS NULL;"
}
}
process {
foreach ($instance in $SqlInstance) {
try {
$server = Connect-DbaInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 10
} catch {
Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue
}
$Server.ConnectionContext.StatementTimeout = 0
$sqlVersion = $(Get-DbaBuild -SqlInstance $server).Build.Major
$sqlVersionRestrictions = @()
if ($sqlVersion -ge 12) {
$sqlVersionRestrictions += "
BEGIN
-- remove memory optimized tables
DELETE tdc
FROM ##TestDbaCompression tdc
INNER JOIN sys.tables t
ON SCHEMA_NAME(t.schema_id) = tdc.[Schema] COLLATE DATABASE_DEFAULT
AND t.name = tdc.TableName COLLATE DATABASE_DEFAULT
WHERE t.is_memory_optimized = 1
END"
}
if ($sqlVersion -ge 13) {
$sqlVersionRestrictions += "
BEGIN
-- remove tables with encrypted columns
DELETE tdc
FROM ##TestDbaCompression tdc
INNER JOIN sys.tables t
ON SCHEMA_NAME(t.schema_id) = tdc.[Schema] COLLATE DATABASE_DEFAULT
AND t.name = tdc.TableName COLLATE DATABASE_DEFAULT
INNER JOIN sys.columns c
ON t.object_id = c.object_id
WHERE encryption_type IS NOT NULL
END"
}
if ($sqlVersion -ge 14) {
$sqlVersionRestrictions += "
BEGIN
-- remove graph (node/edge) tables
DELETE tdc
FROM ##TestDbaCompression tdc
INNER JOIN sys.tables t
ON tdc.[Schema] = SCHEMA_NAME(t.schema_id) COLLATE DATABASE_DEFAULT
AND tdc.TableName = t.name COLLATE DATABASE_DEFAULT
WHERE (is_node = 1 OR is_edge = 1)
END"
}
$sql = "SET NOCOUNT ON;
IF OBJECT_ID('tempdb..##TestDbaCompression', 'U') IS NOT NULL
DROP TABLE ##TestDbaCompression
IF OBJECT_ID('tempdb..##tmpEstimateRow', 'U') IS NOT NULL
DROP TABLE ##tmpEstimateRow
IF OBJECT_ID('tempdb..##tmpEstimatePage', 'U') IS NOT NULL
DROP TABLE ##tmpEstimatePage
CREATE TABLE ##TestDbaCompression (
[Schema] SYSNAME
,[TableName] SYSNAME
,[ObjectId] INT
,[IndexName] SYSNAME NULL
,[Partition] INT
,[IndexID] INT
,[IndexType] VARCHAR(25)
,[PercentScan] SMALLINT
,[PercentUpdate] SMALLINT
,[RowEstimatePercentOriginal] BIGINT
,[PageEstimatePercentOriginal] BIGINT
,[CompressionTypeRecommendation] VARCHAR(7)
,SizeCurrent BIGINT
,SizeRequested BIGINT
,PercentCompression NUMERIC(10, 2)
);
CREATE TABLE ##tmpEstimateRow (
objname SYSNAME
,schname SYSNAME
,indid INT
,partnr INT
,SizeCurrent BIGINT
,SizeRequested BIGINT
,SampleCurrent BIGINT
,SampleRequested BIGINT
);
CREATE TABLE ##tmpEstimatePage (
objname SYSNAME
,schname SYSNAME
,indid INT
,partnr INT
,SizeCurrent BIGINT
,SizeRequested BIGINT
,SampleCurrent BIGINT
,SampleRequested BIGINT
);
INSERT INTO ##TestDbaCompression (
[Schema]
,[TableName]
,[ObjectId]
,[IndexName]
,[Partition]
,[IndexID]
,[IndexType]
,[PercentScan]
,[PercentUpdate]
)
SELECT s.NAME AS [Schema]
,t.NAME AS [TableName]
,t.OBJECT_ID AS [OBJECTID]
,x.NAME AS [IndexName]
,p.partition_number AS [Partition]
,x.Index_ID AS [IndexID]
,x.type_desc AS [IndexType]
,NULL AS [PercentScan]
,NULL AS [PercentUpdate]
FROM sys.tables t
INNER JOIN sys.schemas s ON t.schema_id = s.schema_id
INNER JOIN sys.indexes x ON x.object_id = t.object_id
INNER JOIN sys.partitions p ON x.object_id = p.object_id
AND x.Index_ID = p.Index_ID
WHERE OBJECTPROPERTY(t.object_id, 'IsUserTable') = 1
AND p.data_compression_desc = 'NONE'
AND p.rows > 0
$sqlSchemaWhere
$sqlTableWhere
ORDER BY [TableName] ASC;
$sqlRestrict
BEGIN
-- remove any tables with sparse columns
DELETE tdc
FROM ##TestDbaCompression tdc
INNER JOIN sys.columns c
on tdc.ObjectId = c.object_id
WHERE c. is_sparse = 1
END
$sqlVersionRestrictions
DECLARE @schema SYSNAME
,@tbname SYSNAME
,@ixid INT
DECLARE cur CURSOR FAST_FORWARD
FOR
SELECT [Schema]
,[TableName]
,[IndexID]
FROM ##TestDbaCompression
OPEN cur
FETCH NEXT
FROM cur
INTO @schema
,@tbname
,@ixid
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @sqlcmd NVARCHAR(500)
SET @sqlcmd = 'EXEC sp_estimate_data_compression_savings ''' + @schema + ''', ''' + @tbname + ''', ''' + cast(@ixid AS VARCHAR) + ''', NULL, ''ROW''';
INSERT INTO ##tmpEstimateRow (
objname
,schname
,indid
,partnr
,SizeCurrent
,SizeRequested
,SampleCurrent
,SampleRequested
)
EXECUTE sp_executesql @sqlcmd
SET @sqlcmd = 'EXEC sp_estimate_data_compression_savings ''' + @schema + ''', ''' + @tbname + ''', ''' + cast(@ixid AS VARCHAR) + ''', NULL, ''PAGE''';
INSERT INTO ##tmpEstimatePage (
objname
,schname
,indid
,partnr
,SizeCurrent
,SizeRequested
,SampleCurrent
,SampleRequested
)
EXECUTE sp_executesql @sqlcmd
FETCH NEXT
FROM cur
INTO @schema
,@tbname
,@ixid
END
CLOSE cur
DEALLOCATE cur;
--Update usage and partition_number - If database was restore the sys.dm_db_index_operational_stats will be empty until tables have accesses. Executing the sp_estimate_data_compression_savings first will make those entries appear
UPDATE ##TestDbaCompression
SET
[PercentScan] =
case when (i.range_scan_count + i.leaf_insert_count + i.leaf_delete_count + i.leaf_update_count + i.leaf_page_merge_count + i.singleton_lookup_count) = 0 THEN 0
ELSE i.range_scan_count * 100.0 / NULLIF((i.range_scan_count + i.leaf_insert_count + i.leaf_delete_count + i.leaf_update_count + i.leaf_page_merge_count + i.singleton_lookup_count), 0)
END
,[PercentUpdate] =
case when (i.range_scan_count + i.leaf_insert_count + i.leaf_delete_count + i.leaf_update_count + i.leaf_page_merge_count + i.singleton_lookup_count) = 0 THEN 0
ELSE i.leaf_update_count * 100.0 / NULLIF((i.range_scan_count + i.leaf_insert_count + i.leaf_delete_count + i.leaf_update_count + i.leaf_page_merge_count + i.singleton_lookup_count), 0)
END
FROM sys.dm_db_index_operational_stats(db_id(), NULL, NULL, NULL) i
INNER JOIN ##TestDbaCompression tmp
ON tmp.ObjectId = i.object_id
AND tmp.IndexID = i.index_id;
WITH tmp_cte (
objname
,schname
,indid
,partnr
,pct_of_orig_row
,pct_of_orig_page
,SizeCurrent
,SizeRequested
)
AS (
SELECT tr.objname
,tr.schname
,tr.indid
,tr.partnr
,(tr.SampleRequested * 100) / CASE
WHEN tr.SampleCurrent = 0
THEN 1
ELSE tr.SampleCurrent
END AS pct_of_orig_row
,(tp.SampleRequested * 100) / CASE
WHEN tp.SampleCurrent = 0
THEN 1
ELSE tp.SampleCurrent
END AS pct_of_orig_page
,tr.SizeCurrent
,tr.SizeRequested
FROM ##tmpEstimateRow tr
INNER JOIN ##tmpEstimatePage tp ON tr.objname = tp.objname
AND tr.schname = tp.schname
AND tr.indid = tp.indid
AND tr.partnr = tp.partnr
)
UPDATE ##TestDbaCompression
SET [RowEstimatePercentOriginal] = tcte.pct_of_orig_row
,[PageEstimatePercentOriginal] = tcte.pct_of_orig_page
,SizeCurrent = tcte.SizeCurrent
,SizeRequested = tcte.SizeRequested
,PercentCompression = 100 - (cast(tcte.[SizeRequested] AS NUMERIC(21, 2)) * 100 / (tcte.[SizeCurrent] - ABS(SIGN(tcte.[SizeCurrent])) + 1))
FROM tmp_cte tcte
,##TestDbaCompression tcomp
WHERE tcte.objname = tcomp.TableName
AND tcte.schname = tcomp.[Schema]
AND tcte.indid = tcomp.IndexID
AND tcte.partnr = tcomp.Partition;
WITH tmp_cte2 (
TableName
,[Schema]
,IndexID
,[CompressionTypeRecommendation]
)
AS (
SELECT TableName
,[Schema]
,IndexID
,CASE
WHEN [RowEstimatePercentOriginal] >= 100
AND [PageEstimatePercentOriginal] >= 100
THEN 'NO_GAIN'
WHEN [PercentUpdate] >= 10
THEN 'ROW'
WHEN [PercentScan] <= 1
AND [PercentUpdate] <= 1
AND [RowEstimatePercentOriginal] < [PageEstimatePercentOriginal]
THEN 'ROW'
WHEN [PercentScan] <= 1
AND [PercentUpdate] <= 1
AND [RowEstimatePercentOriginal] > [PageEstimatePercentOriginal]
THEN 'PAGE'
WHEN [PercentScan] >= 60
AND [PercentUpdate] <= 5
THEN 'PAGE'
WHEN [PercentScan] <= 35
AND [PercentUpdate] <= 5
THEN '?'
ELSE 'ROW'
END
FROM ##TestDbaCompression
)
UPDATE ##TestDbaCompression
SET [CompressionTypeRecommendation] = tcte2.[CompressionTypeRecommendation]
FROM tmp_cte2 tcte2
,##TestDbaCompression tcomp2
WHERE tcte2.TableName = tcomp2.TableName
AND tcte2.[Schema] = tcomp2.[Schema]
AND tcte2.IndexID = tcomp2.IndexID;
SET NOCOUNT ON;
SELECT DBName = DB_Name()
,[Schema]
,[TableName]
,[IndexName]
,[Partition]
,[IndexID]
,[IndexType]
,[PercentScan]
,[PercentUpdate]
,[RowEstimatePercentOriginal]
,[PageEstimatePercentOriginal]
,[CompressionTypeRecommendation]
,SizeCurrentKB = [SizeCurrent]
,SizeRequestedKB = [SizeRequested]
,PercentCompression
FROM ##TestDbaCompression;
IF OBJECT_ID('tempdb..##TestDbaCompression', 'U') IS NOT NULL
DROP TABLE ##TestDbaCompression
IF OBJECT_ID('tempdb..##tmpEstimateRow', 'U') IS NOT NULL
DROP TABLE ##tmpEstimateRow
IF OBJECT_ID('tempdb..##tmpEstimatePage', 'U') IS NOT NULL
DROP TABLE ##tmpEstimatePage;
"
Write-Message -Level Debug -Message "SQL Statement: $sql"
[long]$instanceVersionNumber = $($server.VersionString).Replace(".", "")
#If SQL Server 2016 SP1 (13.0.4001.0) or higher every version supports compression.
if ($server.EngineEdition -ne "EnterpriseOrDeveloper" -and $instanceVersionNumber -lt 13040010) {
Stop-Function -Message "Compression before SQLServer 2016 SP1 (13.0.4001.0) is only supported by enterprise, developer or evaluation edition. $server has version $($server.VersionString) and edition is $($server.EngineEdition)." -Target $db -Continue
}
#Filter Database list
try {
$dbs = $server.Databases | Where-Object IsAccessible
if ($Database) {
$dbs = $dbs | Where-Object { $Database -contains $_.Name -and $_.IsSystemObject -eq 0 }
}
else {
$dbs = $dbs | Where-Object { $_.IsSystemObject -eq 0 }
}
if (Test-Bound "ExcludeDatabase") {
$dbs = $dbs | Where-Object Name -NotIn $ExcludeDatabase
}
} catch {
Stop-Function -Message "Unable to gather list of databases for $instance" -Target $instance -ErrorRecord $_ -Continue
}
foreach ($db in $dbs) {
try {
$dbCompatibilityLevel = [int]($db.CompatibilityLevel.ToString().Replace('Version', ''))
Write-Message -Level Verbose -Message "Querying $instance - $db"
if ($db.status -ne 'Normal' -or $db.IsAccessible -eq $false) {
Write-Message -Level Warning -Message "$db is not accessible." -Target $db
Continue
}
if ($dbCompatibilityLevel -lt 100) {
Stop-Function -Message "$db has a compatibility level lower than Version100 and will be skipped." -Target $db -Continue
Continue
}
#Execute query against individual database and add to output
foreach ($row in ($server.Query($sql, $db.Name))) {
[PSCustomObject]@{
ComputerName = $server.ComputerName
InstanceName = $server.ServiceName
SqlInstance = $server.DomainInstanceName
Database = $row.DBName
Schema = $row.Schema
TableName = $row.TableName
IndexName = $row.IndexName
Partition = $row.Partition
IndexID = $row.IndexID
IndexType = $row.IndexType
PercentScan = $row.PercentScan
PercentUpdate = $row.PercentUpdate
RowEstimatePercentOriginal = $row.RowEstimatePercentOriginal
PageEstimatePercentOriginal = $row.PageEstimatePercentOriginal
CompressionTypeRecommendation = $row.CompressionTypeRecommendation
SizeCurrent = [DbaSize]($row.SizeCurrentKB * 1024)
SizeRequested = [DbaSize]($row.SizeRequestedKB * 1024)
PercentCompression = $row.PercentCompression
}
}
} catch {
Stop-Function -Message "Unable to query $instance - $db" -Target $db -ErrorRecord $_ -Continue
}
}
}
}
}