Understanding Logging and Recovery in SQL Server

The below information provided by Paul S Randal for understanding the Logging and Recovery

 Understanding Logging and Recovery

Comments

Post a Comment

Popular posts from this blog

Always On FailOver Events

Image
We can run below PowerShell and SQL Server commands when we want to find ou when the failover has happened. cls   Get-winEvent -ComputerName   ListerNameHere   -filterHashTable @{logname = 'Microsoft-Windows-FailoverClustering/Operational' ; id = 1641 } |   Where-Object { $_ . Timecreated -like '*05/09/2020*' } | Format-Table -AutoSize -Wrap <# 35201-->timeout alert run this by changing -LogName to System 41-->41 is power shutdown run this in system #> clear Get-EventLog -LogName Application -After ( Get-Date ) . AddHours( -48 ) | Where-Object { $_ . EventID -in ( 1100 , 1074 , 35201,41,1561,7024,1135,7032,1146 )} | Format-Table -AutoSize -Wrap cls  Get-EventLog ` -LogName System |Where-Object{$_.EventID -in (1054,1053,1055,1138,1141,1142,5140,5142,1559,1560,1563,1588,1068,5144,1562,5143,5168,1564,1177)}|Format-Table -AutoSize -Wrap EXEC sp_readerrorlog 0,1,'lease worker' EXEC sp_readerrorlog 0,1,'...
Read more

SSAS Cube or Database backup with Powershell command "Backup-AsDatabase"

Image
Run the full code from Load assembly section. # Load the assembly #[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.AnalysisServices") | Out-Null # Create the server object $server = New-Object Microsoft.AnalysisServices.Server $server . Connect ( "localhost" ) # Or your SSAS instance name #Date Converion with minutes and seconds $date = ( get-date ).ToString( "MM_dd_yyyy_hh_mm_ss" ) $Server = New-Object Microsoft.AnalysisServices.Server $Server .Connect( "MAPS\TEST" ) $dbservers = $Server .Databases| Select-Object Name,ParentServer $dbservers | ForEach -Object{ $inddb = $_ #The "Backup-AsDatabase" is especially for SSAS cube backup and downloaded from "SQLServer" powershell module Backup-ASDatabase -BackupFile "E:\MAPS_TEST\SSAS_BACKUP\NEW\ $( $ inddb.Name) _ $( $ date) .abf" -Name $inddb .Name -Verbose -Server $inddb .ParentServer Write-Host "SSAS cube backup [ $( $ i...
Read more

AG SECONDARY DATABASE "Synchronizing" Query

The query below will tell us how much of the REDO log needs to harden in the secondry replica of secondary database. Run the query in SECONDARY REPLICA. If the "redo_queue_size" in KB value reducing means the database soon will come into "Synchronized"state have patience and wait for it. select is_primary_replica, synchronization_state_desc, is_commit_participant, synchronization_health_desc, redo_queue_size from  sys.dm_hadr_database_replica_ states
Read more