BLOB Cache

Hi all
we have been monitoring our reports in the Cache and have noticed that the initial and sometimes the second run of a query does not result in a cache entry, but without making parameter changes further runs appear in the cache.
Does anybody know why this is
Thanks
Hayley

This item is now the subject of a SAP OSS query.

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An error occured in the blob cache

An error occured in the blob cache. The exception message was 'The system cannot find the file specified. (Exception from HRESULT: 0x80070002)'.
Understand that this know issue on SharePoint 2010 is there any fix for this ?
http://blogs.msdn.com/b/spses/archive/2013/10/23/sharepoint-2010-using-blob-caching-throws-many-errors-in-the-uls-and-event-logs-the-system-cannot-find-the-file-specified.aspx
K.Mohamed Faizal, Solution Architect, Singapore, @kmdfaizal
http://faizal-comeacross.blogspot.com/ |AzureUG.SG

Install the December 2013 CU. http://support.microsoft.com/kb/2912738
Trevor Seward
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This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Blob cache issue

I have installed SharePoint 2013 Enterprise version we have 3 Server of SharePoint from which 1 is App Server and other 2 is web server. Web server are on load balance. Database is SQL Server 2012 R2
SharePoint is purely used for heavy traffic Internet website. We have enable blob cache on it. Since when I enable blob cache I am getting error in ULS log
An error occured in the blob cache. The exception message was 'The system cannot find the file specified. (Exception from HRESULT: 0x80070002)'.
When I go to details and I found below. Now I totally understand that in my SharePoint some page or in master page or in web-part I have given wrong path of css or js due to that I am getting below error.
Which is nice to resolve but I have more that 100 pages on my website. So is there any way that I can find on which page is having such issue so I can directly concentrate to remove that error.
Hope I could put my point over here.

wp-includes is a WordPress directory. Is WordPress installed on this server?
https://wordpress.org/plugins/tinymce-advanced/
Trevor Seward
Follow or contact me at...
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Since applying Feb 2013 Sharepoint 2010 CUs - Critical event log entries for Blob cache and missing images

Hi,
Since applying the February 2013 SharePoint 2010 updates, we are getting lots of entries in our event logs along the following:
Content Management Publishing Cache
5538 Critical
An error occurred in the blob cache. The exception message was 'The system cannot find the file specified. (Exception from HRESULT: 0x80070002)’
In pretty much all of these cases the image/ file in question that is reported in the ULS logs as missing is not actually in the collaboration site, master page / html etc so the fix needs to go back to the site owner to make the correction to avoid
the 404 (if they make it!). This has only started happening, I believe since feb 2013 sp2010 cumulative updates updates
I didn’t see this mentioned as a change / in the Fix list of the February updates. i.e. it flags up a critical error in our event logs. So with a lot of sites and a lot of missing images your event log can quickly fill up.
Obviously you can suppress them in the monitoring -> web content management ->publishing cache = none & none which is not ideal.
So my question is... are others seeing this and was a change made by Microsoft to flag a 404 missing image / file up a critical error in event log when blob cache is enabled?
If i log this with MS they will just say, you need to fix it up the missing files in the site but would be nice to know this had changed prior! I also deleted and recreated the blob cache and this made no diffference
thanks
Brad

I'm facing the same error on our SharePoint 2013 farm. We are on Aug 2013 CU and if the Dec CU (which is supposed to be the latest) doesn't solve it then what else could be done.
Some users started getting the message "Server is busy now try again later" with a corelation id. I looked up ULS with that corelation id and found these two errors in addition to hundreds of "Micro Trace Tags (none)" and "forced
due to logging gap":
"GetFileFromUrl: FileNotFoundException when attempting get file Url /favicon.ico The system cannot find the file specified. (Exception from HRESULT: 0x80070002)"
"Error in blob cache. System.IO.FileNotFoundException: The system cannot find the file specified. (Exception from HRESULT: 0x80070002)"
"Unable to cache URL /FAVICON.ICO. File was not found"
Looks like this is a bug and MS hasn't fixed it in Dec CU..
"The opinions expressed here represent my own and not those of anybody else"

Measuring "performance" improvement when enabling blob caching

Hi.
Is there a way to measure improvement/disimprovment when you enable blob caching in a Sharepoint 2013 farm for the user experience? Will it show when measuring page
download time?
Wish you a good day!
Simon

I would use Fiddler2 which will provide you with an overall time. One of the largest improvements for blobcaching is that it tells the client to cache the data so blobs aren't re-requested.
Trevor Seward
Follow or contact me at...
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This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

What's supposed to happen to SharePoint when the IIS blob cache is full?

Can someone possibly point me at a description of what's supposed to happen to SharePoint if the IIS blob cache directory fills up?
I've seen postings from MS saying that you need to keep the directory 20% bigger than the amount of files you might end up storing in there, but that's clearly not the whole answer.
I ask because we've had a problem today on SP2010 with files disappearing from people's sites as soon as they are uploaded, or being replaced with files of 0 bytes. It seems to be caused by the blob cache directory being full, and SharePoint not making
any attempt to free up space in it.
Rob Schifreen SharePoint 2010 Admin University of Brighton, UK

For me, on Mac, the second (or more) time I open an image from Bridge or from Photoshop's Recent menu, it opens the image in ACR (7.2) a second time and appends a -2 to the file name once opened in Photoshop. Each time the image is opened up again, it adds an appended -x number. I'm pretty sure this is the expected behavior...

Blob cache - dedicated drive - allocation unit size

Hi
I'm setting up dedicated drives on the WFEs for Blobcache and just formatting the new simple volumes and I was wondering if Default is the best option for the Allocation unit size
Is there any best practice or guidance here or should I just stick with default?
Thanks
J

Default is ideal since you'll be mostly dealing with small files.
That said, the advantage for BC comes from the max-age value, which allows clients to not even ask the SharePoint server for the file and instead use local browser cache.
Trevor Seward
Follow or contact me at...
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Query Performance with and without cache

Hi Experts
I have a query that takes 50 seconds to execute without any caching or precalculation.
Once I have run the query in the Portal, any subsequent execution takes about 8 seconds.
I assumed that this was to do with the cache, so I went into RSRT and deleted the Main Memory Cache and the Blob cache, where my queries seemed to be.
I ran the query again and it took 8 seconds.
Does the query cache somewhere else? Maybe on the portal? or on the users local cache? Does anyone have any idea of why the reports are still fast, even though the cache is deleted?
Forum points always awarded for helpful answers!!
Many thanks!
Dave

Hi,
Cached data automatically becomes invalid whenever data in the InfoCube is loaded or purged and when a query is changed or regenerated. Once cached data becomes invalid, the system reverts to the fact table or associated aggregate to pull data for the query You can see the cache settings for all queries in your system using transaction SE16 to view table RSRREPDIR . The CACHEMODE field shows the settings of the individual queries. The numbers in this field correspond to the cache mode settings above.
To set the cache mode on the InfoCube, follow the path Business Information Warehouse Implementation Guide (IMG)>Reporting-Relevant Settings>General Reporting Settings>Global Cache Settings or use transaction SPRO . Setting the cache mode at the InfoCube level establishes a default for each query created from that specific InfoCube.

SharePoint 2010 Cache Not working for Publishing Images Document Library

Hi
I am using SharePoint 2010 Publishing Site and have enabled anonymous access.
I have enabled blob cache and object cache in the site.
While i was checking with fiddler those objects in style library and other document libraries are cached.
Whereas the images from the document library Publishing images is not cached; its returning 304 Not Modified status code.
Is there a way to include the Publishing images to be cacheable as well ?
Please advise
Ready for Action

Did you perform IISreset on all sharepoint server after enabling cache
http://technet.microsoft.com/en-us/library/cc261797%28v=office.15%29.aspx
To use the page output cache and the associated cache profile settings, you must be using the Publishing feature on your site.
http://sharepointinterface.com/tag/caching/
Wiley went out to SharePoint, checked the article that he wrote, and saw that he did indeed use a series of dynamite sticks for an image. The page should have actually appeared as it does in the screenshot that is above and to the left. After a quick facepalm,
Wiley realized that he needed to make a change – and fast.
Wiley went out to the Publishing Images library for the site collection and uploaded a new version of the
newsarticleimage.jpg image file – one that contained a barrel of TNT instead of a bundle of dynamite. He then browsed to the article page and did a refresh.
Nothing changed.
Wiley hit F5 in his browser. Still nothing changed.
Over the course of the hour that followed, Wiley grew increasingly more bewildered and panicked as he tried in vain to get the new TNT barrel to show up on the article page. He uploaded the image several more times, closed and re-opened his browser, deleted
and then reloaded the image, re-published and re-approved the actual article page, and even got the administrators to flush the SharePoint BLOB Cache. None of the actions made a difference.
The Coyote Never Wins
Why didn’t any of Wiley’s efforts make a difference? Because what Wiley didn’t understand was that there was nothing he could do short of flushing his cache that would prompt the browser to re-request the updated image. The browser started using the cached
copy of the image after the first request Wiley made in the morning; i.e., the request to verify that the image on the page was incorrect as Fulfillment indicated. For another 24 hours (86400 seconds), the browser would continue to use the cached image.
Wiley’s image problem was just one of the potential issues that might surface as a result of the BLOB Cache change. It was also one of the more visible problems. In looking at the
path attribute of the BlobCache element, you might have noticed some of the other file types that got cached by default – file types with
js (JavaScript) and css (Cascading Style Sheets) extensions, for example. Any of those file types which were served from site collection lists and libraries would also be impacted by the “fetch once and use for 24 hours” behavior.
If this helped you resolve your issue, please mark it Answered

Caching RAW and LONG RAW objects

Hi,
Is there any way to cache RAW and LONG RAW object like BLOB caching?
Thanks

Is there any way to cache RAW and LONG RAW object like BLOB caching?What is the version?
to fetch long fetch size character of bytes you must use any one of below three.
1)Primary key
2)ROWID
3)Unique columns

Unable to create system performance counter SharePoint Disk-Based Cache - SharePoint 2010 SP2 Farm

Hi,
I'm getting this in my Trace Logs:
Performance Counter OS (pdh) call failed with error code PDH_CSTATUS_BAD_COUNTERNAME
PDH failure on counter <serverName>\Sharepoint Disk-Based Cache\Blob Cache hit ration with Unknown error (0x0000bc0)
Unable to create system performance counter <ServerName>\SharePoint Disk-Based Cache\\Blob Cache fill ratio
Unable to create system performance counter <ServerName>\SharePoint Disk-Based Cache\\Total Blob Size
There are bunch of them from SharePoint Disk-Based Cache counter that its trying to create but they cannot be used.
I've logged on to the server as a farm admin, which has full farm permissions, local admin and runs OWSTIMER.EXE service, but I was not able to add the counters myself. I've read few posts here on TechNet but no one answered on how to enable/recreate these
performance counters. I would like to resolve this if its possible.

I could not find the reason why those SharePoint Performance Counters were not on the WFE servers so I just disabled the "Diagnostic Data Provider: Performance Counters - Web Front Ends" in the Central Admin > Monitoring > Job Definitions.

Setting up object cache.

Hi Team,
we are scaling a new SharePoint farm and have 16GB servers with following configuration.
SP2013
SQL 2012
Window Server with 2008 R2 enterprise
3 WFE(internal)
3 APP Server
2 WFE(External)
RAM 16GB
Publishing template site
65000 User includes around 5000-8000 concurrent users
We have configured Super Reader and Super User and have enabled BLOB cache in our farms. Since we are scaling the environment we want to know the best figures for stting up object cache.
current object cache Configuration
<ObjectCache maxSize="100" />
Thanks Help appreciated
Thanks Ba$va

How are you measuring the performance? How are you simulating (or actually placing) a load on the infrastructure?
As with most things performance-related there isn't a specific setting that is the best. It all depends on your specific use. Your specific use can also change over time depending on the volume of users and the types of content you are publishing.
From Designing and Developing High-Performance SharePoint Server 2007 Publishing Sites (It's written for SharePoint 2007 but the object cache functionality remains
the same in 2010):
The configuration of the output cache for each site collection enables administrators to set how much memory the object cache
can use. Use the ASP.NET 2.0 performance counter Cache Hit Ratio to determine whether more memory should be allocated to the object cache. If the hit ratio is below 90 percent, which means less than 90 percent of the time objects are not found in cache and
the server has to go to the database to retrieve the content, consider increasing the amount of memory allocated to the object cache.
I would use this guidance as a starting point. Monitor the ASP.NET Output Cache Hit Ratio performance counter and increase the memory allocated if this counter is regularly reporting below 90%. This means the output cache is used to retrieve content less than
90% of the time, or to put it another way, SharePoint is going to the content database for retrieving more than 10% of the content.
Jason Warren
@jaspnwarren
jasonwarren.ca
habaneroconsulting.com/Insights

After delete file from documents the direct link still alive.

Hello.
I upload a image to the style libary folder, then i publish the file and delete him BUT the direct link to the image still work.
I try to upload anther image with the some name but when i try to browse the direct link i get to deleted file.
If i upload a image and delete it before i publish the file I don't have this problem.
I try to flush the blob cache with this commends:
$webApp = Get-SPWebApplication "<WebApplicationURL>"
[Microsoft.SharePoint.Publishing.PublishingCache]::FlushBlobCache($webApp)
Write-Host "Flushed the BLOB cache for:" $webAppbut this doesn't work.I clear the cache on the local pc and doesn't work to..Any idea someone?Thanks!

Hi,
To check if there is cache issue, please access the url in another PC to see if the issue persists. You could also open style library in SharePoint designer to double confirm it.
In addition, if you click the ellipsis of the image item, there will be a preview panel to show the picture, is it the newly upload one?
Regards,
Rebecca Tu
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected]

Image Renditions not working in publishing site

Hi,
I've through the process of getting image renditions working in my SharePoint farm. I have 2 WFEs and 2 Apps.
Have enabled the blob cache in the web.config on all servers as detailed in TechNet and image renditions started to work.
One day I noticed that the images on my home page have gone all a little wonky. Images were either showing their original size or displaying broken links.
Checking the "Image Renditions" part in "Site Settings" it was telling me that I needed to enable the blob cache. Looking at an images library I also noticed that the "Image Renditions" option had gone. Checked all the web.config
files and the blob cache was still enabled. Looked at the location and there were files in there.
I've tried disabling and re-enabling the cache. Have done IISRESETs, restarted timer service restarted server, but to no avail. It still thinks that the blob cache is not enabled.
Have gone through the hundreds of different blog posts on how to enable it, just to make sure. Please also note that this was working, even after SP1 was applied. Don't know of any other patches or changes that have been made to the server.
Anyone got any ideas as this is driving me nuts.
Cheers

Did we try to check details in Verbose mode
please check what happens when your login happens in Fiddler traces

Pictures not appearing in mac messages?

When pictures are sent to my iphone the appear in the thread on my iphone but not the same thread on my mac messages app. ***?

Hi Bala,
Nothing appears under the Hyperlink section in Catalog browser, though a valid link exists in Data Manager under Hyperlink as type-Rendered, MIME type as JPG and a valid URL.
I have searched Service Market place for this fix of this issue and found that SAP has improved the technology ( from Object Cache to Blob Cache) to display pictures/hyperlinks from SRM-MDM Catalog 3.0 SP06 and MDM 7.1SP04 onwards. We were on SRM-MDM Catalog 3.0 SP05 and MDM 7.1 SP03 before Dev upgrade.
Here are the notes for reference of others who get into same issue.
Note 1450593 - Implementation of BlobCache
This note states "MDM7.1 SP04 offers new image caching functionality called Blob Cache. The old functionality of Object Cache is replaced with the Blocb Cache mechanism in Catalog 3.0 SP06 P1"
Note 1505796 - Images not showing in SRM-MDM catalog (error in BlobCache)
This note talks about the issue in MDM API with Blob Cache. The Fix has been provided in SRM-MDM Catalog SP08 Patch 01.
But upgrade is not something that happens on the drop of a hat, we dont want to do another upgrade, I would like to know if there is a workaround.
Thanks
Pravin

BLOB Cache

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