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Reworked PRAGMA statements use

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This commit is contained in:
Bond_009
2019-04-03 17:34:54 +02:00
committed by Bond_009
parent edfd2d0cd9
commit 7898af4ceb
7 changed files with 46 additions and 60 deletions
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92
Emby.Server.Implementations/Data/BaseSqliteRepository.cs
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@@ -9,27 +9,37 @@ namespace Emby.Server.Implementations.Data
{
public abstract class BaseSqliteRepository : IDisposable
{
protected string DbFilePath { get; set; }
protected ILogger Logger { get; }
private bool _disposed = false;
protected BaseSqliteRepository(ILogger logger)
{
Logger = logger;
}
protected string DbFilePath { get; set; }
protected ILogger Logger { get; }
protected virtual ConnectionFlags DefaultConnectionFlags => ConnectionFlags.NoMutex;
protected TransactionMode TransactionMode => TransactionMode.Deferred;
protected TransactionMode ReadTransactionMode => TransactionMode.Deferred;
protected virtual ConnectionFlags DefaultConnectionFlags => ConnectionFlags.NoMutex;
protected virtual int? CacheSize => null;
protected virtual string JournalMode => "WAL";
protected virtual int? PageSize => null;
protected virtual TempStoreMode TempStore => TempStoreMode.Default;
protected virtual SynchronousMode? Synchronous => null;
protected SemaphoreSlim WriteLock = new SemaphoreSlim(1, 1);
protected SQLiteDatabaseConnection WriteConnection;
private string _defaultWal;
protected ManagedConnection GetConnection(bool _ = false)
{
WriteLock.Wait();
@@ -43,23 +53,28 @@ namespace Emby.Server.Implementations.Data
DefaultConnectionFlags | ConnectionFlags.Create | ConnectionFlags.ReadWrite,
null);
if (string.IsNullOrWhiteSpace(_defaultWal))
if (CacheSize.HasValue)
{
_defaultWal = WriteConnection.Query("PRAGMA journal_mode").SelectScalarString().First();
Logger.LogInformation("Default journal_mode for {0} is {1}", DbFilePath, _defaultWal);
WriteConnection.Execute("PRAGMA cache_size=" + (int)CacheSize.Value);
}
if (EnableTempStoreMemory)
if (!string.IsNullOrWhiteSpace(JournalMode))
{
WriteConnection.Execute("PRAGMA temp_store = memory");
WriteConnection.Execute("PRAGMA journal_mode=" + JournalMode);
}
else
if (Synchronous.HasValue)
{
WriteConnection.Execute("PRAGMA temp_store = file");
WriteConnection.Execute("PRAGMA synchronous=" + (int)Synchronous.Value);
}
if (PageSize.HasValue)
{
WriteConnection.Execute("PRAGMA page_size=" + (int)PageSize.Value);
}
WriteConnection.Execute("PRAGMA temp_store=" + (int)TempStore);
return new ManagedConnection(WriteConnection, WriteLock);
}
@@ -92,38 +107,6 @@ namespace Emby.Server.Implementations.Data
}, ReadTransactionMode);
}
protected void RunDefaultInitialization(ManagedConnection db)
{
var queries = new List<string>
{
"PRAGMA journal_mode=WAL",
"PRAGMA page_size=4096",
"PRAGMA synchronous=Normal"
};
if (EnableTempStoreMemory)
{
queries.AddRange(new List<string>
{
"pragma default_temp_store = memory",
"pragma temp_store = memory"
});
}
else
{
queries.AddRange(new List<string>
{
"pragma temp_store = file"
});
}
db.ExecuteAll(string.Join(";", queries));
Logger.LogInformation("PRAGMA synchronous=" + db.Query("PRAGMA synchronous").SelectScalarString().First());
}
protected virtual bool EnableTempStoreMemory => true;
private bool _disposed;
protected void CheckDisposed()
{
if (_disposed)
@@ -199,4 +182,19 @@ namespace Emby.Server.Implementations.Data
connection.Execute("alter table " + table + " add column " + columnName + " " + type + " NULL");
}
}
public enum SynchronousMode
{
Off = 0,
Normal = 1,
Full = 2,
Extra = 3
}
public enum TempStoreMode
{
Default = 0,
File = 1,
Memory = 2
}
}