private ScratchBufferItem NextFile(long minSize, long?requestedSize)
{
var current = _recycleArea.Last;
var oldestTx = _env.PossibleOldestReadTransaction(null);
while (current != null)
{
var recycled = current.Value;
if (recycled.File.Size >= Math.Max(minSize, requestedSize ?? 0) &&
// even though this is in the recyle bin, there might still be some transactions looking at it
// so we have to make sure that this is really unused before actually reusing it
recycled.File.HasActivelyUsedBytes(oldestTx) == false)
{
recycled.File.Reset();
recycled.RecycledAt = default(DateTime);
_recycleArea.Remove(current);
AddScratchBufferFile(recycled);
_scratchSpaceMonitor.Increase(recycled.File.NumberOfAllocatedPages * Constants.Storage.PageSize);
return(recycled);
}
current = current.Previous;
}
_currentScratchNumber++;
AbstractPager scratchPager;
if (requestedSize != null)
{
try
{
scratchPager =
_options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber),
requestedSize.Value);
}
catch (Exception)
{
// this can fail because of disk space issue, let us just ignore it
// we'll allocate the minimum amount in a bit anyway
return(NextFile(minSize, null));
}
}
else
{
scratchPager = _options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber),
Math.Max(_options.InitialLogFileSize, minSize));
}
var scratchFile = new ScratchBufferFile(scratchPager, _currentScratchNumber);
var item = new ScratchBufferItem(scratchFile.Number, scratchFile);
AddScratchBufferFile(item);
_scratchSpaceMonitor.Increase(item.File.NumberOfAllocatedPages * Constants.Storage.PageSize);
return(item);
}
public void WhenInitialFileSizeIsSetTheFileSizeForDataFileAndScratchFileShouldBeSetAccordinglyAndItWillBeRoundedToTheNearestGranularity()
{
var options = StorageEnvironmentOptions.ForPath(DataDir);
options.InitialFileSize = GetExpectedInitialSize() * 2 + 1;
using (new StorageEnvironment(options))
{
var dataFile = Path.Combine(DataDir, Constants.DatabaseFilename);
var scratchFile = Path.Combine(DataDir, StorageEnvironmentOptions.ScratchBufferName(0));
if (StorageEnvironmentOptions.RunningOnPosix)
{
// on Linux, we use 4K as the allocation granularity
Assert.Equal(0, new FileInfo(dataFile).Length % 4096);
Assert.Equal(0, new FileInfo(scratchFile).Length % 4096);
}
else
{
// on Windows, we use 64K as the allocation granularity
Assert.Equal(0, new FileInfo(dataFile).Length % GetExpectedInitialSize());
Assert.Equal(0, new FileInfo(scratchFile).Length % GetExpectedInitialSize());
}
}
}
public ScratchBufferPoolInfo InfoForDebug(long oldestActiveTransaction)
{
var currentFile = _current.File;
var scratchBufferPoolInfo = new ScratchBufferPoolInfo
{
OldestActiveTransaction = oldestActiveTransaction,
NumberOfScratchFiles = _scratchBuffers.Count,
CurrentFileNumber = currentFile.Number,
CurrentFileSizeInMB = currentFile.Size / 1024L / 1024L,
PerScratchFileSizeLimitInMB = _options.MaxScratchBufferSize / 1024L / 1024L,
CurrentUtcTime = DateTime.UtcNow
};
foreach (var scratchBufferItem in _scratchBuffers.Values.OrderBy(x => x.Number))
{
var current = _current;
var scratchFileUsage = new ScratchFileUsage
{
Name = StorageEnvironmentOptions.ScratchBufferName(scratchBufferItem.File.Number),
SizeInKB = scratchBufferItem.File.Size / 1024,
NumberOfAllocations = scratchBufferItem.File.NumberOfAllocations,
AllocatedPagesCount = scratchBufferItem.File.AllocatedPagesCount,
CanBeDeleted = scratchBufferItem != current && scratchBufferItem.File.HasActivelyUsedBytes(oldestActiveTransaction) == false,
TxIdAfterWhichLatestFreePagesBecomeAvailable = scratchBufferItem.File.TxIdAfterWhichLatestFreePagesBecomeAvailable,
IsInRecycleArea = _recycleArea.Contains(scratchBufferItem),
NumberOfResets = scratchBufferItem.File.DebugInfo.NumberOfResets,
LastResetTime = scratchBufferItem.File.DebugInfo.LastResetTime,
LastFreeTime = scratchBufferItem.File.DebugInfo.LastFreeTime
};
foreach (var freePage in scratchBufferItem.File.DebugInfo.GetMostAvailableFreePagesBySize())
{
scratchFileUsage.MostAvailableFreePages.Add(new MostAvailableFreePagesBySize
{
Size = freePage.Key,
ValidAfterTransactionId = freePage.Value
});
}
foreach (var allocatedPage in scratchBufferItem.File.DebugInfo.GetFirst10AllocatedPages())
{
scratchFileUsage.First10AllocatedPages.Add(new AllocatedPageInScratchBuffer()
{
NumberOfPages = allocatedPage.NumberOfPages,
PositionInScratchBuffer = allocatedPage.PositionInScratchBuffer,
ScratchFileNumber = allocatedPage.ScratchFileNumber,
ScratchPageNumber = allocatedPage.ScratchPageNumber,
Size = allocatedPage.Size
});
}
scratchBufferPoolInfo.ScratchFilesUsage.Add(scratchFileUsage);
}
return(scratchBufferPoolInfo);
}
public void DefaultScratchLocation()
{
var options = (StorageEnvironmentOptions.DirectoryStorageEnvironmentOptions)StorageEnvironmentOptions.ForPath(DataDir);
using (var env = new StorageEnvironment(options))
{
var scratchFile = Path.Combine(DataDir, StorageEnvironmentOptions.ScratchBufferName(0));
Assert.True(File.Exists(scratchFile));
}
}
public void TempPathForVoronShouldWork2()
{
using (var storage = NewTransactionalStorage(requestedStorage: "voron", dataDir: path, tempDir: temp, runInMemory: false))
{
var scratchFile = Path.Combine(path, StorageEnvironmentOptions.ScratchBufferName(0));
var scratchFileTemp = Path.Combine(temp, StorageEnvironmentOptions.ScratchBufferName(0));
Assert.False(File.Exists(scratchFile));
Assert.True(File.Exists(scratchFileTemp));
}
}
public void ScratchLocationWithTemporaryPathSpecified()
{
var options = (StorageEnvironmentOptions.DirectoryStorageEnvironmentOptions)StorageEnvironmentOptions.ForPath(DataDir, DataDir + "Temp");
using (var env = new StorageEnvironment(options))
{
var scratchFile = Path.Combine(DataDir, StorageEnvironmentOptions.ScratchBufferName(0));
var scratchFileTemp = Path.Combine(DataDir + "Temp", StorageEnvironmentOptions.ScratchBufferName(0));
Assert.False(File.Exists(scratchFile));
Assert.True(File.Exists(scratchFileTemp));
}
}
private ScratchBufferItem NextFile()
{
_currentScratchNumber++;
var scratchPager = _options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber));
scratchPager.EnsureContinuous(0, (int)(Math.Max(_options.InitialFileSize ?? 0, _options.InitialLogFileSize) / _options.PageSize));
var scratchFile = new ScratchBufferFile(scratchPager, _currentScratchNumber);
var item = new ScratchBufferItem(scratchFile.Number, scratchFile);
_scratchBuffers.TryAdd(item.Number, item);
return(item);
}
private ScratchBufferFile NextFile()
{
_currentScratchNumber++;
var scratchPager = _options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber));
scratchPager.AllocateMorePages(null, Math.Max(_options.InitialFileSize ?? 0, _options.InitialLogFileSize));
var scratchFile = new ScratchBufferFile(scratchPager, _currentScratchNumber);
_scratchBuffers.Add(_currentScratchNumber, scratchFile);
_oldestTransactionWhenFlushWasForced = -1;
return(scratchFile);
}
public void WhenInitialFileSizeIsSetTheFileSizeForDataFileAndScratchFileShouldBeSetAccordingly()
{
var options = StorageEnvironmentOptions.ForPath(DataDir);
options.InitialFileSize = GetExpectedInitialSize() * 2;
using (new StorageEnvironment(options))
{
var dataFile = Path.Combine(DataDir, Constants.DatabaseFilename);
var scratchFile = Path.Combine(DataDir, StorageEnvironmentOptions.ScratchBufferName(0));
Assert.Equal(0, new FileInfo(dataFile).Length % GetExpectedInitialSize());
Assert.Equal(0, new FileInfo(scratchFile).Length % GetExpectedInitialSize());
}
}
public void WhenInitialFileSizeIsSetTheFileSizeForDataFileAndScratchFileShouldBeSetAccordinglyAndItWillBeRoundedToTheNearestGranularity()
{
var options = StorageEnvironmentOptions.ForPath(path);
options.InitialFileSize = GetExpectedInitialSize() * 2 + 1;
using (new StorageEnvironment(options))
{
var dataFile = Path.Combine(path, Constants.DatabaseFilename);
var scratchFile = Path.Combine(path, StorageEnvironmentOptions.ScratchBufferName(0));
Assert.Equal(GetExpectedInitialSize() * 3, new FileInfo(dataFile).Length);
Assert.Equal(GetExpectedInitialSize() * 3, new FileInfo(scratchFile).Length);
}
}
private ScratchBufferItem NextFile()
{
_currentScratchNumber++;
var scratchPager = _options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber));
scratchPager.AllocateMorePages(null, Math.Max(_options.InitialFileSize ?? 0, _options.InitialLogFileSize));
var scratchFile = new ScratchBufferFile(scratchPager, _currentScratchNumber);
var item = new ScratchBufferItem(scratchFile.Number, scratchFile);
_scratchBuffers.TryAdd(item.Number, item);
return(item);
}
public void WhenInitialFileSizeIsNotSetTheFileSizeForDataFileAndScratchFileShouldBeSetToSystemAllocationGranularity()
{
var options = StorageEnvironmentOptions.ForPath(DataDir);
options.InitialFileSize = null;
using (new StorageEnvironment(options))
{
var dataFile = Path.Combine(DataDir, Constants.DatabaseFilename);
var scratchFile = Path.Combine(DataDir, StorageEnvironmentOptions.ScratchBufferName(0));
Assert.Equal(GetExpectedInitialSize(), new FileInfo(dataFile).Length);
Assert.Equal(GetExpectedInitialSize(), new FileInfo(scratchFile).Length);
}
}
private ScratchBufferItem NextFile(long minSize, long?requestedSize, LowLevelTransaction tx)
{
if (_recycleArea.Count > 0)
{
var recycled = _recycleArea.Last.Value.Item2;
_recycleArea.RemoveLast();
if (recycled.File.Size <= Math.Max(minSize, requestedSize ?? 0))
{
recycled.File.Reset(tx);
_scratchBuffers.TryAdd(recycled.Number, recycled);
return(recycled);
}
}
_currentScratchNumber++;
AbstractPager scratchPager;
if (requestedSize != null)
{
try
{
scratchPager =
_options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber),
requestedSize.Value);
}
catch (Exception)
{
// this can fail because of disk space issue, let us just ignore it
// we'll allocate the minimum amount in a bit anway
return(NextFile(minSize, null, tx));
}
}
else
{
scratchPager = _options.CreateScratchPager(StorageEnvironmentOptions.ScratchBufferName(_currentScratchNumber),
Math.Max(_options.InitialLogFileSize, minSize));
}
var scratchFile = new ScratchBufferFile(scratchPager, _currentScratchNumber);
var item = new ScratchBufferItem(scratchFile.Number, scratchFile);
_scratchBuffers.TryAdd(item.Number, item);
return(item);
}
public void WhenInitialFileSizeIsSetTheFileSizeForDataFileAndScratchFileShouldBeSetAccordinglyAndItWillBeRoundedToTheNearestGranularity()
{
Win32NativeMethods.SYSTEM_INFO systemInfo;
Win32NativeMethods.GetSystemInfo(out systemInfo);
var options = StorageEnvironmentOptions.ForPath(path);
options.InitialFileSize = systemInfo.allocationGranularity * 2 + 1;
using (new StorageEnvironment(options))
{
var dataFile = Path.Combine(path, Constants.DatabaseFilename);
var scratchFile = Path.Combine(path, StorageEnvironmentOptions.ScratchBufferName(0));
Assert.Equal(systemInfo.allocationGranularity * 3, new FileInfo(dataFile).Length);
Assert.Equal(systemInfo.allocationGranularity * 3, new FileInfo(scratchFile).Length);
}
}
public ScratchBufferPoolInfo InfoForDebug(long oldestActiveTransaction)
{
var currentFile = _current.File;
var scratchBufferPoolInfo = new ScratchBufferPoolInfo
{
OldestActiveTransaction = oldestActiveTransaction,
NumberOfScratchFiles = _scratchBuffers.Count,
CurrentFileNumber = currentFile.Number,
CurrentFileSizeInMB = currentFile.Size / 1024L / 1024L,
PerScratchFileSizeLimitInMB = _options.MaxScratchBufferSize / 1024L / 1024L
};
foreach (var scratchBufferItem in _scratchBuffers.Values.OrderBy(x => x.Number))
{
var current = _current;
var scratchFileUsage = new ScratchFileUsage
{
Name = StorageEnvironmentOptions.ScratchBufferName(scratchBufferItem.File.Number),
SizeInKB = scratchBufferItem.File.Size / 1024,
NumberOfAllocations = scratchBufferItem.File.NumberOfAllocations,
AllocatedPagesCount = scratchBufferItem.File.AllocatedPagesCount,
CanBeDeleted = scratchBufferItem != current && scratchBufferItem.File.HasActivelyUsedBytes(oldestActiveTransaction) == false,
TxIdAfterWhichLatestFreePagesBecomeAvailable = scratchBufferItem.File.TxIdAfterWhichLatestFreePagesBecomeAvailable
};
foreach (var freePage in scratchBufferItem.File.GetMostAvailableFreePagesBySize())
{
scratchFileUsage.MostAvailableFreePages.Add(new MostAvailableFreePagesBySize
{
Size = freePage.Key,
ValidAfterTransactionId = freePage.Value
});
}
scratchBufferPoolInfo.ScratchFilesUsage.Add(scratchFileUsage);
}
return(scratchBufferPoolInfo);
}
private void ThrowScratchBufferTooBig(LowLevelTransaction tx, int numberOfPages, long size, long oldestActiveTransaction,
long sizeAfterAllocation, Stopwatch sp, ScratchBufferItem current)
{
var debugInfoBuilder = new StringBuilder();
var totalPages = tx.GetTransactionPages().Count;
debugInfoBuilder.AppendFormat("Current transaction id: {0}\r\n", tx.Id);
if ((totalPages + numberOfPages) * tx.Environment.Options.PageSize >= _sizeLimit / 2)
{
debugInfoBuilder.Append("- - - - - - - - - - - - -\r\n");
debugInfoBuilder.AppendFormat(
"This transaction is VERY big, and requires {0:##,###;;0} kb out of {1:##,###;;0} kb allows!\r\n",
((totalPages + numberOfPages) * tx.Environment.Options.PageSize) / 1024,
_sizeLimit / 1024
);
debugInfoBuilder.Append("- - - - - - - - - - - - -\r\n");
}
debugInfoBuilder.AppendFormat("Requested number of pages: {0} (adjusted size: {1} == {2:#,#;;0} KB)\r\n", numberOfPages,
size, size * tx.Environment.Options.PageSize / 1024);
debugInfoBuilder.AppendFormat("Total number of pages in tx: {0} (adjusted size: {1} == {2:#,#;;0} KB)\r\n", totalPages,
totalPages, totalPages * tx.Environment.Options.PageSize / 1024);
debugInfoBuilder.AppendFormat("Oldest active transaction: {0} (snapshot: {1})\r\n", tx.Environment.OldestTransaction,
oldestActiveTransaction);
debugInfoBuilder.AppendFormat("Oldest active transaction when flush was forced: {0}\r\n",
current.OldestTransactionWhenFlushWasForced);
debugInfoBuilder.AppendFormat("Next write transaction id: {0}\r\n", tx.Environment.NextWriteTransactionId + 1);
debugInfoBuilder.AppendLine("Active transactions:");
foreach (var activeTransaction in tx.Environment.ActiveTransactions)
{
debugInfoBuilder.AppendFormat("\tId: {0} - {1}\r\n", activeTransaction.Id, activeTransaction.Flags);
}
debugInfoBuilder.AppendLine("Scratch files usage:");
foreach (var scratchBufferFile in _scratchBuffers.OrderBy(x => x.Key))
{
debugInfoBuilder.AppendFormat("\t{0} - size: {1:#,#;;0} KB, in active use: {2:#,#;;0} KB\r\n",
StorageEnvironmentOptions.ScratchBufferName(scratchBufferFile.Value.Number), scratchBufferFile.Value.File.Size / 1024,
scratchBufferFile.Value.File.ActivelyUsedBytes(oldestActiveTransaction) / 1024);
}
debugInfoBuilder.AppendLine("Most available free pages:");
foreach (var scratchBufferFile in _scratchBuffers.OrderBy(x => x.Key))
{
debugInfoBuilder.AppendFormat("\t{0}\r\n", StorageEnvironmentOptions.ScratchBufferName(scratchBufferFile.Value.Number));
foreach (var freePage in scratchBufferFile.Value.File.GetMostAvailableFreePagesBySize())
{
debugInfoBuilder.AppendFormat("\t\tSize:{0}, ValidAfterTransactionId: {1}\r\n", freePage.Key, freePage.Value);
}
}
debugInfoBuilder.AppendFormat("Compression buffer size: {0:#,#;;0} KB\r\n",
tx.Environment.Journal.CompressionBufferSize / 1024);
string debugInfo = debugInfoBuilder.ToString();
string message = string.Format("Cannot allocate more space for the scratch buffer.\r\n" +
"Current file size is:\t{0:#,#;;0} KB.\r\n" +
"Requested size for current file:\t{1:#,#;;0} KB.\r\n" +
"Requested total size for all files:\t{2:#,#;;0} KB.\r\n" +
"Limit:\t\t\t{3:#,#;;0} KB.\r\n" +
"Already flushed and waited for {4:#,#;;0} ms for read transactions to complete.\r\n" +
"Do you have a long running read transaction executing?\r\n" +
"Debug info:\r\n{5}",
current.File.Size / 1024L,
current.File.SizeAfterAllocation(size) / 1024L,
sizeAfterAllocation / 1024L,
_sizeLimit / 1024L,
sp.ElapsedMilliseconds,
debugInfo
);
throw new ScratchBufferSizeLimitException(message);
}
public PageFromScratchBuffer Allocate(Transaction tx, int numberOfPages)
{
if (tx == null)
{
throw new ArgumentNullException("tx");
}
var size = Utils.NearestPowerOfTwo(numberOfPages);
PageFromScratchBuffer result;
if (_current.TryGettingFromAllocatedBuffer(tx, numberOfPages, size, out result))
{
return(result);
}
long sizeAfterAllocation;
long oldestActiveTransaction = tx.Environment.OldestTransaction;
if (_scratchBuffers.Count == 1)
{
sizeAfterAllocation = _current.SizeAfterAllocation(size);
}
else
{
sizeAfterAllocation = size * AbstractPager.PageSize;
var scratchesToDelete = new List <int>();
// determine how many bytes of older scratches are still in use
foreach (var scratch in _scratchBuffers.Values)
{
var bytesInUse = scratch.ActivelyUsedBytes(oldestActiveTransaction);
if (bytesInUse > 0)
{
sizeAfterAllocation += bytesInUse;
}
else
{
if (scratch != _current)
{
scratchesToDelete.Add(scratch.Number);
}
}
}
// delete inactive scratches
foreach (var scratchNumber in scratchesToDelete)
{
var scratchBufferFile = _scratchBuffers[scratchNumber];
_scratchBuffers.Remove(scratchNumber);
scratchBufferFile.Dispose();
}
}
if (sizeAfterAllocation >= (_sizeLimit * 3) / 4 && oldestActiveTransaction > _oldestTransactionWhenFlushWasForced)
{
// we may get recursive flushing, so we want to avoid it
if (tx.Environment.Journal.Applicator.IsCurrentThreadInFlushOperation == false)
{
// We are starting to force a flush to free scratch pages. We are doing it at this point (80% of the max scratch size)
// to make sure that next transactions will be able to allocate pages that we are going to free in the current transaction.
// Important notice: all pages freed by this run will get ValidAfterTransactionId == tx.Id (so only next ones can use it)
bool flushLockTaken = false;
using (tx.Environment.Journal.Applicator.TryTakeFlushingLock(ref flushLockTaken))
{
if (flushLockTaken) // if we are already flushing, we don't need to force a flush
{
try
{
tx.Environment.ForceLogFlushToDataFile(tx, allowToFlushOverwrittenPages: true);
_oldestTransactionWhenFlushWasForced = oldestActiveTransaction;
}
catch (TimeoutException)
{
// we'll try next time
}
catch (InvalidJournalFlushRequest)
{
// journals flushing already in progress
}
}
}
}
}
if (sizeAfterAllocation > _sizeLimit)
{
var sp = Stopwatch.StartNew();
// Our problem is that we don't have any available free pages, probably because
// there are read transactions that are holding things open. We are going to see if
// there are any free pages that _might_ be freed for us if we wait for a bit. The idea
// is that we let the read transactions time to complete and do their work, at which point
// we can continue running. It is possible that a long running read transaction
// would in fact generate enough work for us to timeout, but hopefully we can avoid that.
while (sp.ElapsedMilliseconds < tx.Environment.Options.ScratchBufferOverflowTimeout)
{
if (_current.TryGettingFromAllocatedBuffer(tx, numberOfPages, size, out result))
{
return(result);
}
Thread.Sleep(32);
}
sp.Stop();
bool createNextFile = false;
if (_current.HasDiscontinuousSpaceFor(tx, size, _scratchBuffers.Count))
{
// there is enough space for the requested allocation but the problem is its fragmentation
// so we will create a new scratch file and will allow to allocate new continuous range from there
createNextFile = true;
}
else if (_scratchBuffers.Count == 1 && _current.Size < _sizeLimit &&
(_current.ActivelyUsedBytes(oldestActiveTransaction) + size * AbstractPager.PageSize) < _sizeLimit)
{
// there is only one scratch file that hasn't reach the size limit yet and
// the number of bytes being in active use allows to allocate the requested size
// let it create a new file
createNextFile = true;
}
if (createNextFile)
{
_current = NextFile();
tx.EnsurePagerStateReference(_current.PagerState);
return(_current.Allocate(tx, numberOfPages, size));
}
var debugInfoBuilder = new StringBuilder();
debugInfoBuilder.AppendFormat("Current transaction id: {0}\r\n", tx.Id);
debugInfoBuilder.AppendFormat("Requested number of pages: {0} (adjusted size: {1} == {2:#,#;;0} KB)\r\n", numberOfPages, size, size * AbstractPager.PageSize / 1024);
debugInfoBuilder.AppendFormat("Oldest active transaction: {0} (snapshot: {1})\r\n", tx.Environment.OldestTransaction, oldestActiveTransaction);
debugInfoBuilder.AppendFormat("Oldest active transaction when flush was forced: {0}\r\n", _oldestTransactionWhenFlushWasForced);
debugInfoBuilder.AppendFormat("Next write transaction id: {0}\r\n", tx.Environment.NextWriteTransactionId + 1);
debugInfoBuilder.AppendLine("Active transactions:");
foreach (var activeTransaction in tx.Environment.ActiveTransactions)
{
debugInfoBuilder.AppendFormat("\tId: {0} - {1}\r\n", activeTransaction.Id, activeTransaction.Flags);
}
debugInfoBuilder.AppendLine("Scratch files usage:");
foreach (var scratchBufferFile in _scratchBuffers.OrderBy(x => x.Key))
{
debugInfoBuilder.AppendFormat("\t{0} - size: {1:#,#;;0} KB, in active use: {2:#,#;;0} KB\r\n", StorageEnvironmentOptions.ScratchBufferName(scratchBufferFile.Value.Number), scratchBufferFile.Value.Size / 1024, scratchBufferFile.Value.ActivelyUsedBytes(oldestActiveTransaction) / 1024);
}
debugInfoBuilder.AppendLine("Most available free pages:");
foreach (var scratchBufferFile in _scratchBuffers.OrderBy(x => x.Key))
{
debugInfoBuilder.AppendFormat("\t{0}\r\n", StorageEnvironmentOptions.ScratchBufferName(scratchBufferFile.Value.Number));
foreach (var freePage in scratchBufferFile.Value.GetMostAvailableFreePagesBySize())
{
debugInfoBuilder.AppendFormat("\t\tSize:{0}, ValidAfterTransactionId: {1}\r\n", freePage.Key, freePage.Value);
}
}
debugInfoBuilder.AppendFormat("Compression buffer size: {0:#,#;;0} KB\r\n", tx.Environment.Journal.CompressionBufferSize / 1024);
string debugInfo = debugInfoBuilder.ToString();
string message = string.Format("Cannot allocate more space for the scratch buffer.\r\n" +
"Current file size is:\t{0:#,#;;0} KB.\r\n" +
"Requested size for current file:\t{1:#,#;;0} KB.\r\n" +
"Requested total size for all files:\t{2:#,#;;0} KB.\r\n" +
"Limit:\t\t\t{3:#,#;;0} KB.\r\n" +
"Already flushed and waited for {4:#,#;;0} ms for read transactions to complete.\r\n" +
"Do you have a long running read transaction executing?\r\n" +
"Debug info:\r\n{5}",
_current.Size / 1024L,
_current.SizeAfterAllocation(size) / 1024L,
sizeAfterAllocation / 1024L,
_sizeLimit / 1024L,
sp.ElapsedMilliseconds,
debugInfo
);
throw new ScratchBufferSizeLimitException(message);
}
// we don't have free pages to give out, need to allocate some
result = _current.Allocate(tx, numberOfPages, size);
_options.OnScratchBufferSizeChanged(sizeAfterAllocation);
return(result);
}