Pushing the Limits of Windows: Handles. Pushing the Limits of Windows: USER and GDI Objects – Part 1. GDI objects represent graphical device interface resources like fonts, bitmaps, brushes, pens, and device contexts (drawing surfaces). As it does for USER objects, the window manager limits processes to at most 10,000 GDI objects. Cannot Map Anymore Windows Objects Internal Limit Reached On Twitter. 8/11/2017 0 Comments Technology and Science News - ABC News. The Roomba 900 Series offers a Clean Map Report, which maps your home as it vacuums, improving its movement and telling you how well it cleaned. If Windows still cannot find the network path, contact your.
Last time, I covered the limits and how to measure usage of one of the two key window manager resources, USER objects. This time, I’m going to cover the other key resource, GDI objects. As always, I recommend you read the previous posts before this one, because some of the limits related to USER and GDI resources are based on limits I’ve covered. Here’s a full index of my other Pushing the Limits of Windows posts:
In most networks file shares can be reached via 5 paths: Fully qualified DFS name, e.g. Domain.com dfsroot share. How to Limit CPU & RAM via the Windows Boot Configuration; Windows 10: Black Lock Screen with Citrix Receiver. 8 Responses to Windows Offline Files: Problems and Solutions. Martin Binder May 14.
GDI objects represent graphical device interface resources like fonts, bitmaps, brushes, pens, and device contexts (drawing surfaces). As it does for USER objects, the window manager limits processes to at most 10,000 GDI objects, which you can verify with Testlimit using the –g switch:
You can look at an individual process’s GDI object usage on the Performance page of its Process Explorer process properties dialog and add the GDI Objects column to Process Explorer to watch GDI object usage across processes:
Also like USER objects, 16-bit interoperability means that USER objects have 16-bit identifiers, limiting them to 65,535 per session. Here’s the desktop as it appeared when Testlimit hit that limit on a Windows Vista 64-bit system:
Note the Start button on the bottom left where it belongs, but the rest of the task bar at the top of the screen. The desktop has turned black and the sidebar has lost most of its color. Your mileage may vary, but you can see that bizarre things start to happen, potentially making it impossible to interact with the desktop in a reliable way. Here’s what the display switched to when I pressed the Start button:
Unlike USER objects, GDI objects aren’t allocated from desktop heaps; instead, on Windows XP and Windows Server 2003 systems that don’t have Terminal Services installed, they allocate from general paged pool; on all other systems they allocate from per-session session pool.
The kernel debugger’s “!vm 4” command dumps general virtual memory information, including session information at the end of the output. On a Windows XP system it shows that session paged pool is unused:
On a Windows Server 2003 system without Terminal Services, the output is similar:
The GDI object memory limit on these systems is therefore the paged pool limit, as described in my previous post, Pushing the Limits of Windows: Paged and Nonpaged Pool. However, when Terminal Services are installed on the same Windows Server 2003 system, you can see from the non-zero session pool usage that GDI objects come from session pool:
The !vm 4 command in the above output also shows the session paged pool maximum and session pool sizes, but the session paged pool maximum and session space sizes don’t display on Windows Vista and higher because they are variable. Session paged pool usage on those systems is capped by either the amount of address space it can grow to or the System Commit Limit, whichever is smaller. Here’s the output of the command on a Windows 7 system showing the current session paged pool usage by session:
As you’d expect, the main interactive session, Session 1, is consuming the most session paged pool.
You can use the Testlimit tool with the “–g 0” switch to see what happens when the storage used for GDI objects is exhausted. The number you specify after the –g is the size of the GDI bitmap objects Testlimit allocates, but a size of 0 has Testlimit simply try and allocate the largest objects possible. Here’s the result on a 32-bit Windows XP system:
On a Windows XP or Windows Server 2003 that doesn’t have Terminal Services installed you can use the Poolmon utility from Windows Driver Kit (WDK) to see the GDI object allocations by their pool tag. The output of Poolmon the while Testlimit was exhausting paged pool on the WIndows XP system looks like this when sorted by bytes allocated (type ‘b’ in the Poolmon display to sort by bytes allocated), by inference indicating that Gh05 is the tag for bitmap objects on Windows Server 2003:
On a Windows Server 2003 system with Terminal Services installed, and on Windows Vista and higher, you have to use Poolmon with the /s switch to specify which session you want to view. Here’s Testlimit executed on a Windows Server 2003 system that has Terminal Services installed:
The command “poolmon /s1” shows the tags with the largest allocation contributing for Session 1. You can see the Gh15 tag at the top, showing that a different pool tag is being used for bitmap allocations:
Note how Testlimit was able to allocate around 58 MB of bitmap data (that number doesn’t account for GDI’s internal overhead for a bitmap object) on the Windows XP system, but only 10MB on the Windows Server 2003 system. The smaller number comes from the fact that session pool on the Windows Server 2003 Terminal Server system is only 32 MB, which is about the amount of memory Poolmon shows attributed to the Gh15 tag. The output of “!vm 4” confirms that session pool for Session1 is been consumed and that subsequent attempts to allocate GDI objects from session pool have failed:
You can also use the !poolused kernel debugger command to look at session pool usage. First, switch to the correct session by using the .process command with the /p switch and the address of a process object that’s connected to the session. To see what processes are running in a particular session, use the !sprocess command. Here’s the output of !poolmon on the same Windows Server 2003 system, where the “c” option to !poolused has it sort the output by allocated bytes:
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Unfortunately, there’s no public mapping between the window manager’s heap tags and the objects they represent, but the kernel debugger’s !poolused command uses the triage.ini file from the debugger’s installation directory to print more descriptive information about a tag. The command reports that Gh15 is GDITAG_HMGR_SPRITE_TYPE, which is only slightly more helpful, but others are more clear.
Fortunately, most GDI and USER object issues are limited to a particular process hitting the per-process 10,000 object limit and so more advanced investigation to figure out what process is responsible for exhausting session pool or allocating GDI objects to exhaust paged pool is unnecessary.
Next time I’ll take a look at System Page Table Entries (System PTEs), another key system resource that can has limits that can be hit, especially on Remote Desktop sessions on Windows Server 2003 systems.
My SQL Server instance's (SQL Server 2008 R2 Express) service has Startup Type = Automatic. The past couple of times I've restarted my computer the service has failed to start on its own, but it starts just fine when I manually start the service.
Event Viewer shows that the service fails to start because of a connection timeout. There are 2 entries regarding this timeout:
A timeout was reached (30000 milliseconds) while waiting for the SQL Server (SQLEXPRESS) service to connect.
The SQL Server (SQLEXPRESS) service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion.
I checked the ERRORLOG files and there are no errors logged around the time of those Event Viewer entries.
Any ideas on the cause of this problem or how I can investigate further?KeithKeith
This issue happens because the SQL Server lost the logon id credentials or used an account without rights to start services.
For starting your services automatically, SQL Server needs an account with rights to start services during operating system start up.
To solve this issue you need to go Administrative Tools > Services > SQL Server(MSSQLSERVER or the name of your instances) > Right Click > Properties > Move to Log On > Set the Log On option using a Local System Account
If you have chosen this option, hit on Browse Button and find the Local Service Account or Network service Account there > Click in Apply.
Restart your computer and you will able to start your SQL Server.Thronk
Just a quick thought on something to look into, in a domain type environment, some operating systems allow you to logon to the server before full network connectivity is established. You may want to check for either local or domain level group policy settings to not allow logon or OS startup until full network connectivity is established.
Just in case you notice this when you log onto the server after reboots, it actually logs onto the OS with the cached credential before it can reach the domain controllers to authenticate (network connectivity not fully established) with the login credential if it's a domain credential the SQLExpress service account is running as.
Not sure if that's exactly applicable in your case but this is something to at least simply investigate and try to test at least just in case.
I found this in some article I saved long ago when I had a similar issue with an AD home directory (not via login script) to map home directory for a workstation PC:
The policy value for Computer Configuration -> Administrative Templates -> System -> Logon “Always Wait for the Network at Computer Startup and Logon” will be set to “Enabled”.
If the following registry value doesn’t exist or its value is not set to 1, then this is a finding:
Registry Hive: HKEY_LOCAL_MACHINESubkey: SoftwarePoliciesMicrosoftWindows NTCurrentVersionWinlogonValue Name: SyncForegroundPolicyType: REG_DWORDValue: 1
Have you tried logging on as the local Administrator?
I have been having this exact same problem with SQL 2014 Express on Windows 10. I wanted to create a new user that wasn't the built-in local Administrator so I created a new user, added it to the Administrators group, set that user to autologon upon boot et voila! SQL Server service fails to start automatically. I tried delayed start, tried Local Service, tried Network Service, tried the new administrator user, tried the Always Wait... group policy setting. Nothing worked.
Even uninstalled SQL Server 2014 Express, rebooted, manually removed all leftover files/folders and rebooted again and reinstalled under the new administrator user. Still no go.
Switched back to autologon as the built-in Administrator account et voila! SQL Server service is now starting automatically.
This is obviously a workaround for me so I am still researching.
** UPDATE **
Actually, my problem was rooted in the machine having been renamed previously. Once I changed the 'OriginalMachineName' value in the registry, problem solved!
I went to Local service and changed
SQL Server(MSSQLSERVER SQL Server Agent (MSSQLSERVER)
Set them to Automatic Delayed andLogon type to
Local System AccountTick ( Allow service to Interact with desktop)
And it starts automatically
Well, there are a few things you can try. First, go to Control Panel > System and Security > Administrative Tools > Services > then find SQL Server or SQL Server VSS Writer in the Services (Local) list. Right-click it and select Properties, click the General tab and ensure that Startup type is set to 'Automatic'.
Now, the service may actually be failing for some reason. So what you can do is, click the Recovery tab, and select an option for First failure. Probably try to Restart the Service.
Next thing to do is to go to Event Viewer and check the Services list and check for any warnings or errors that may have been logged by the service (or Windows).
If all else fails, you can try using the Rebuild Master Utility. For details on that, see this MSDN page: https://social.msdn.microsoft.com/Forums/en-US/f713067f-3017-478b-a9ae-8049d80f9fdc/sql-server-is-not-starting-up?forum=sqldatabaseengine