How to Flush DNS Cache in Mavericks 10.9.3

So I have seen references to the following when searching for a cmd to flush DNS
sudo killall -HUP mDNSResponder and sudo dscacheutil -flushcache
Which one is proper for Mavericks 10.9.3?

Mountain Lion, but should be applicable to Mavericks.
DNS cache - Reset

Similar Messages

How to flush the cache of a JCO repository ?

Does anybody now how to flush the cache of the JCO repositories of pools managed by Netweaver application server without restarting the JVM ?
The reason I'm asking is that, whenever a tables or structure changes on ABAP side (CRM, IS-U, R/3), even though we redeploy the J2EE applications, they do not see the new definitions, and we have to restart the JVMs.
This is particularily annoying in an "high availability" production environment such a ours.
We need a close to 24/7 up time, and putting down the JVM for even a few minutes is becoming a problem.
I'd like to be able to manually flush the repositories when needed.
For example, is it possible to write a small java application that could perform the flush on a single request ?
I did not try writing any code to do so yet, but I guess this snippet can do the work:
IRepository rCRM = JCO.createRepository("FLUSH_CRM", "java:comp/env/eis/pool_crm")
while (rCRM !=null)
   String [] crmFuncts = rCRM.getCachedFunctionInterfaces()
   String [] crmStructs = rCRM.getCachedStructureDefinitions()
   for (int i=0; crmFuncts!=null && i<crmFuncts.lenght; i++)
      rCRM.removeFunctionInterfaceFromCache(crmFuncts<i>);
   for (int i=0; crmStructs!=null && i<crmStructs.lenght; i++)
      rCRM.removeStructureDefinitionFromCache(crmStructs<i>);
   rCRM = rCRM.getNextRepository();
Does it ?
Edited by: Croussette Yves on Jun 9, 2008 8:46 PM
Edited by: Croussette Yves on Jun 9, 2008 8:47 PM

Hi,
Please check these link:-
1.[https://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/3219]
2.https://www.sdn.sap.com/irj/scn/thread?messageID=601915
3.https://www.sdn.sap.com/irj/scn/thread?messageID=135202
Best Regards,
Atul Bhatia

Flushing DNS Cache

How do members here go about flushing their dns cache?

Maybe server is not updating? I've seen this. Flush cache, reload, and new updates are displayed as expected.

How do I flush my DNS cache

My internet lookup is slow. I have read that I can fix this by using either openDNS or googleDNS servers. How Do I flush my DNS cache after switching DNS servers?

Restart the computer.

Flush the DNS cache

How do i flush the DNS cache on an iPhone?

TrYaN73 wrote:
How do i flush the DNS cache on an iPhone?
There's no specific way to do that exact thing in iOS. However, resetting network settings will help resolve a lot of network-related issues for both Wi-Fi and cellular connections.
Reset network settings by tapping Settings > General > Reset > Reset Network Settings.

10G NEW FEATURE-HOW TO FLUSH THE BUFFER CACHE

제품 : ORACLE SERVER
작성날짜 : 2004-05-25
10G NEW FEATURE-HOW TO FLUSH THE BUFFER CACHE
===============================================
PURPOSE
이 자료는 Oracle 10g new feature 로 manual 하게
buffer cache 를 flush 할 수 있는 기능에 대하여 알아보도록 한다.
Explanation
Oracle 10g 에서 new feature 로 소개된 내용으로 SGA 내 buffer cache 의
모든 data 를 command 수행으로 clear 할 수 있다.
이 작업을 위해서는 "alter system" privileges 가 있어야 한다.
Buffer cache flush 를 위한 command 는 다음과 같다.
주의) 이 작업은 database performance 에 영향을 줄 수 있으므로 주의하여 사용하여야 한다.
SQL > alter system flush buffer_cache;
Example
x$bh 를 query 하여 buffer cache 내 존재하는 정보를 확인한다.
x$bh view 는 buffer cache headers 정보를 확인할 수 있는 view 이다.
우선 test 로 table 을 생성하고 insert 를 수행하고
x$bh 에서 barfil column(Relative file number of block) 과 file# 를 조회한다.
1) Test table 생성
SQL> Create table Test_buffer (a number)
2 tablespace USERS;
Table created.
2) Test table 에 insert
SQL> begin
2 for i in 1..1000
3 loop
4 insert into test_buffer values (i);
5 end loop;
6 commit;
7 end;
8 /
PL/SQL procedure successfully completed.
3) Object_id 확인
SQL> select OBJECT_id from dba_objects
2 where object_name='TEST_BUFFER';
OBJECT_ID
42817
4) x$bh 에서 buffer cache 내에 올라와 있는 DBARFIL(file number of block) 를 조회한다.
SQL> select ts#,file#,dbarfil,dbablk,class,state,mode_held,obj
2 from x$bh where obj= 42817;
TS# FILE# DBARFIL DBABLK CLASS STATE MODE_HELD J
9 23 23 1297 8 1 0 7
9 23 23 1298 9 1 0 7
9 23 23 1299 4 1 0 7
9 23 23 1300 1 1 0 7
9 23 23 1301 1 1 0 7
9 23 23 1302 1 1 0 7
9 23 23 1303 1 1 0 7
9 23 23 1304 1 1 0 7
8 rows selected.
5) 다음과 같이 buffer cache 를 flush 하고 위 query 를 재수행한다.
SQL > alter system flush buffer_cache ;
SQL> select ts#,file#,dbarfil,dbablk,class,state,mode_held,obj
2 from x$bh where obj= 42817;
6) x$bh 에서 state column 이 0 인지 확인한다.
0 은 free buffer 를 의미한다. flush 이후에 state 가 0 인지 확인함으로써
flushing 이 command 를 통해 manual 하게 수행되었음을 확인할 수 있다.
Reference Documents
<NOTE. 251326.1>

I am also having the same issue. Can this be addressed or does BEA provide 'almost'
working code for the bargin price of $80k/cpu?
"Prashanth " <[email protected]> wrote:
>
Hi ALL,
I am using wl:cache tag for caching purpose. My reqmnt is such that I
have to
flush the cache based on user activity.
I have tried all the combinations, but could not achieve the desired
result.
Can somebody guide me on how can we flush the cache??
TIA, Prashanth Bhat.

How can I make WL 8.1 flush the cache and/or pool for 1.1 EJBs

Hi,
I'm using 1.1 deployment descriptors for my CMP entity bean that were previously
used in the WL 5.1 version of my project.
Things do get deployed but I've observed confusing information when monitoring
the EJB via Admin Console.
What appears is that the Weblogic container is not flushing the cache and/or pool
after the bean has finished processing and also a sufficient time has expired
(i.e. the idle-timeout-seconds)
From what I've understood via the on-line information is that each EJB has its
own cache (since I've not done anything special for that) and the instance in
cache is only passivated when the cache is full and the server need to activate
another instance. On passivation, it appears to be returning the instance to the
pool. But its unclear/undocumented when the pool is cleared, if at all.
What I want is that:
1. A way to get my cached instance passivated
2. A way to get my pooled instance flushed.
The reason I'm looking into this is becasue in my case it appears that the cached/pooled
instance are contributing to OutOfMemory errors and because of the nature of requirements,
etc. we need to have the cache size be high for certain processing.
Thanks
Parasher

I think it's probably best to contact technical support about this.
There are different patches for different versions of WLS.
I'd mention 'CR128026' to them to get started.
-thorick
"Parasher" <[email protected]> wrote:
>
Hi,
Thank you for your reply !
How can I get more information about this patch and the patch itself
Is there a way I can look it up online or do I have to contact the support
folks
and if so what should I need to tell them to convey which patch I'm talking
about.
Thank you in advance.
Parasher
"thorick" <[email protected]> wrote:
Hi,
If you use 'Database' concurrency, then there is a patch available for
some 8.1
service
packs to enable idle-timeout-seconds on the cache. I believe that this
will be
standard
feature with the next service pack. There is no comparable mechanism
for the
pool in 8.1,
this is a feature that is coming with the next major release of WLS.
If the
8.1 patch works
for you, it can save you memory during off peak usage times. Notethat
this
patch does not
work for 'Exclusive' concurrency.
-thorick

How to see the cached DNS result

Dear All,
Can anyone tell me how to see my DNS caching server cached info ? Where the info had been queried by some DNS clients.
Thanks a lot !
CK

Depending on your bind version, but with recent version you can use rndc dumpdb
to let bind dump its cache. If you want to log the queries and clients you can turn on logging but please be aware of the overhead and disk usages. Please consult Sun document 816-4556 and Bind9ARM document.

How do I empty Safari cache in Mavericks?

How do I empty Sarari cache in Mavericks? I can't get some websites to open.

Safari / History / Clear History.

Flushing the DNS cache

I'm having trouble with a Web site when I access it on my home computer, yet this same site looks fine on my Mini at work. One section of the index page generates a "can't find server" error, and the site's own logo won't display properly. It is a free hosting site. Sometimes I can upload files to it, other times I get a can't-find-server error when I try.
In answer to my query about this (to which I helpfully attached a screenshot of the incompletely loaded index page and its error messages), the host is telling me that I should "flush my DNS cache," which they say involves going into Terminal and giving the command "ookupd -flushcache" [sic]. (I've already surfed this briefly and the first result confirmed my suspicion that this doofus hasn't mastered copy-and-paste technique and the command actually should be "lookupd- flushcache".)
It's not just that their site doesn't load fully, though. They have some stuff on one of their pages that they encourage users to hotlink on personal Web sites, and I have done that with one of their banners. The banner, which was fine for months, now appears on my page as a broken icon, too, although it, like the site's home page, loads fine on my computer at work.
My first question is, is there any harm in flushing the DNS cache? The OS Daily page where I think they copied this advice from makes it sound like this is something only a Web server would need. If I do it on my home machine, could it cause problems? Could it disable my Internet connectivity?
Second, less urgent question, more for the netgeeks out there: Do you think this is a likely solution to my problem? Especially considering that the problem involves not only their site but an element on an external site linking back to them? I hate to play the sucker for some low-level geek whose main mission is to deflect my query.
Thanks
Kathi

Kathi--
Like BDAqua says, there's nothing to worry about flushing the DNS cache. It's true that most people probably don't need to do it very often, but it's something easy and harmless to try, and it might well fix problems like yours.
One handy feature of Safari, even if you don't use it for anything else, is the "Activity" window. Open it from the "View" menu, and watch as your page loads. You can see exactly which components on the page are loading, which aren't and where they should be coming from. If you double-click an element in that list, Safari will try to open it in a new window. That is sometimes enough to give a clue as to why something isn't working.
You can use Safari's activity list along with the Network Utility from your Utilities folder to try to figure out why you're not getting the page elements. Suppose a graphic is listed as coming from http://www.server1.com/images/logo.jpg, but it's not loading.
First thing I would try in the Network Utility is to see if it will respond to pings. From that example, enter "www.server1.com" on the "Ping" page of the Network Utility and see if it answers back.
To find out if it's a DNS problem, you can use Safari's list to get the addresses of the problem elements, then see if the IP addresses match up on your computer at home to the one at work. If they don't, then it could be stale DNS.
You can use the Network Utility for DNS lookups, but I think they're hard to read, and, since you're already thinking about using the Terminal to flush the DNS cache, you can use nslookup. It's really simple:
<pre class="command">nslookup www.apple.com</pre>
Will give you something like this (the first two lines will likely be different):
Server: 208.67.222.222
Address: 208.67.222.222#53
Non-authoritative answer:
www.apple.com canonical name = www.apple.com.akadns.net.
Name: www.apple.com.akadns.net
Address: 17.251.200.32
If the addresses don't match, or you get a message that it can't find anything for your server, then you know it's a DNS problem. Perhaps they've changed some addresses and your home ISP's DNS servers themselves aren't updating.
You can even use nslookup to see what different DNS servers say about an address. Just add the IP address of a DNS server after the address you want to look up:
<pre class="command">nslookup www.apple.com 208.67.220.220</pre>
Just do a search on the 'net for free DNS servers, and you'll find a bunch to choose from.
charlie

Where Is My DNS Cache And How Do I Clear It?

I'm using Timbuktu to reach my desktop iMac remotely. I subscribe to DYNDNS to detect IP changes. Recently, after a blackout, I could not reach the iMac remotely via DYNDNS. I WAS able to use the new IP (which I had someone look up for me) and Timbuktu connected just fine.
After contacting DYNDNS, they told me to clear my DNS cache, as that was probably the reason why their detecting system could not see the new IP.
My head is spinning. Can some kindly tell me where the DNS cache is on my iMac 10.4.11 and how to clear it? (For idiots, please).
Many thanks
---Gary

Yes, it's clear. Thanks.
I'm just too nervous to try this until my Mac Guru is sitting here. I can't unscramble anything I screw up...and that's a pretty good possibility based on past events.
Again, thanks
Gary

How to clear cache in mavericks

how to clear cache in mavericks ?

You can use one of several good utilities:
Mavericks Cache Cleaner
Onyx
Cocktail
You will find them at www.macupdate.com.
Also, you should startup in Safe Mode, then restart normally. This is a slow startup, but part of the process cleans out some system caches.
I don't know what browser you use, but there should be some cache clearing options available.

How can I clear the DNS cache?

I haven't been able to connect to my local Library since January. When I key in the URL, it starts the access routine and then after about 20 minutes, I have to kill it because nothing happens. I contacted the IT folks at the library and was told that they had made a few changes around the time my problem began so maybe the DNS cache was still pointing at the old info. He recommended that I enter TERMINAL mode and try to clear the DNS cache, using "sudo dscacheutil -flushcache" command. . I attempted this several times, even changing my applid password, and kept getting invalid responses.

I did try that and after a few trys it finally worked. It took quite awhile for the window for the library to finally come up, but it did and I am now able to get in and out with no problems with my library access. Now when I call up my bank, parts of it don't come up and it kicks me out. Now, I'll have to search for what fixes that - as it has happened before, so I know it's fixable. Thanks for you help though.

How do i flush dns on OS X 10.9.2

i need help how to flush dsn on osx 10.9.2

Get (free) Onyx for 10.9. You can do it with that.
Oops, wrong, thought it could do that.
In Terminal
sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder
You will be asked for your admin pword when you run this command (copy and paste) You won't see it in any form when you type it in.
Actually, had a better look. Onyx can do that. Close all browsers before doing this.

Flushing dns mac os 10.9.2?

When I run suggested protocol to flush DNS (dscacheutil -flushcache;sudo killall -HUP mDNSResponder) nothing happens.
What I am really trying to do: I have an accumulation of websites that pop up as suggestions when I want to create a document hyperlink to a site on the web. i want to clear this list. Is that part of the DNS cache flush?
If not, how can I get rid of this list?
If so, why doesn't the protocol above work?
Thanks...

Thanks. I didn't ask the question very well.
I am doing a power point presentation and am creating hot links to pages of websites.
In the dialog box to insert a hyper link there is a field at the top ("link to") in which the destination website address is supposed to be entered.
There are "suggested" websites in a list that shows up when I click on the arrow to the right this field.
I don't want that list to appear any more.
I thought it would be something to do with erasing a cache...so I tried to do a DNS flush as I describe, above, but nothing happened. I entered the two commands (one after the other) and all I got was a new line on which to enter another command.
My main goal is to get rid of that list in the insert hyperlink dialog box -- I don't like any such lists.
I am now, additionally, interested in why the DNS flush does not apparently work.
Thanks for any help you might be able to give.

How to Flush DNS Cache in Mavericks 10.9.3

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