Slowness during first oracle operation of the day
Hi All
In our application(trading application) first oracle transaction takes time after starting process(transaction invokes calling packages,insert and select queries)
Second and so forth transaction gets executed in very less time ( first transaction take around 1200 miliseconds and after first transaction other transactions take near about 80 miliseconds)
Please suggest what should we do for first transaction time improvement.
Hi,
> take a chill pill & realize that 1.2 seconds is a reasonable response time. … I'd say your client has already spent more money on this (paying for your billable time) than they will ever recover.
The OP already mentioned that this performance issue is faced by a trading application and if you think about high performance environments like high frequency trading apps, then 1200 ms compared to 80 ms are like a journey to the moon and back in such environments. I also did not believe how much money depends on a few milliseconds until i worked for such clients. However back to main topic.
> Please suggest what should we do for first transaction time improvement.
At first you need to identify the "bottleneck" or better said the difference between the 1200 ms and 80 ms executions. AWR / ASH is not reasonable in such short runtime cases due to 1 out of 10 samples (of 1 second snapshots) and system wide statistics. Enable an extended SQL trace with waits, binds and all execution plan dumps and compare both runs. Provide these results or the raw trace files here and then we are able to suggest anything valid. Maybe you have to capture more detailed session statistics as well (e.g. with Snapper), but this will be obvious afterwards.
> We already increase the size of shared pool from 3 gb to 5 gb and also we did pinning of packages and frequently used tables but we got slightly improvement.
Do you know that the response time difference is caused by loading PL/SQL packages, etc. or was this just a shot in the dark? Please follow the previously mentioned extended SQL trace approach to do a systematic and productive analysis / troubleshooting.
Regards
Stefan
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com.apple.iokit.IOPCIFamily 2.7.2
com.apple.iokit.IOACPIFamily 1.4
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From the sounds of your problem is sounds like you are approaching a full disk.
Allan -
Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems never arose during two years of using LTR-4 and nothing else has changed on my computer. I have a pretty simple system with only a few plug-ins, which are usually not in operation. I have 12GB of RAM in my Windows 7 PC. I could illustrate these problems with screen shots if you would tell me how to submit screen shots. Otherwise I will try to describe the problems in words.
The problem is clearly cumulative, growing worse as usage time passes. Compare View feature gradually slows down and eventually seems to choke as my work session proceeds. If I Exit LTR and re-enter and start all over, things will work normally for maybe 30 minutes, but then the Compare View feature begins to become very slow to respond. In a recent example with my screen full of thumbnails in Library mode I highlighted two images to compare. LTR started to open the Compare View screen by first having the top row of thumbnails disappear to be replaced by the "SELECT" and "CANDIDATE" words in their spaces (but no images), but Compare View never succeeded in gaining control of the screen. After some seconds the top row of thumbnails reasserted its position and the Compare View windows disappeared. But LTR kept trying to bring them back. Again the top row of thumbnails would go away, Select and candidate would reappear, try again, and give up. This went on for at least 2-3 minutes before I tried to choose File and Exit, but even that did not initially want to respond. It doesn't like to accept other commands when it's trying to open Compare View. Finally it allowed me to exit.
To experiment I created a new catalog of 1100 images. After 30-40 minutes, the Compare View function began to operate very slowly. With left and right side panels visible and two thumbnails highlighted, hitting Compare View can take half a minute before the two mid-size images open in their respective SELECT and CANDIDATE windows. When the side panels are open and two images are in the Select/Candidate spaces, hitting the Tab button to close the side panels produces a very delayed response--25-30 seconds to close them, a few more seconds to enlarge the two images to full size. To reverse the process (i.e., to recall the two side panels), hitting Tab would make the two sides of the screen go black for up to a minute, with no words visible. Eventually the info fields in the panels would open up.
I also created a new user account and imported a folder of 160 images. After half an hour Compare View began mis-placing data. (I have a screen shot to show this.) CANDIDATE appears on the left side of SELECT, whereas it should be on the right. The accompanying camera exposure data appears almost entirely to the left of the mid-screen dividing line. Although the Candidate and Select headings were transposed, the image exposure data was not, but the data for the image on the right was almost entirely to the left of the line dividing the screen in two.
Gurus in The Lightroom Forum have examined Task Manager data showing Processes running and Performance indicators and they see nothing wrong. I could also send screen shots of this data.
At this point, the only way I can process my images is to work 30-40 minutes and then shut down everything, exit, and re-start LTR. This is not normal. I hope you can find the cause, and then the solution. If you would like to see my screen shots, tell me how to submit them.
Ollie
[email protected]Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems never arose during two years of using LTR-4 and nothing else has changed on my computer. I have a pretty simple system with only a few plug-ins, which are usually not in operation. I have 12GB of RAM in my Windows 7 PC. I could illustrate these problems with screen shots if you would tell me how to submit screen shots. Otherwise I will try to describe the problems in words.
The problem is clearly cumulative, growing worse as usage time passes. Compare View feature gradually slows down and eventually seems to choke as my work session proceeds. If I Exit LTR and re-enter and start all over, things will work normally for maybe 30 minutes, but then the Compare View feature begins to become very slow to respond. In a recent example with my screen full of thumbnails in Library mode I highlighted two images to compare. LTR started to open the Compare View screen by first having the top row of thumbnails disappear to be replaced by the "SELECT" and "CANDIDATE" words in their spaces (but no images), but Compare View never succeeded in gaining control of the screen. After some seconds the top row of thumbnails reasserted its position and the Compare View windows disappeared. But LTR kept trying to bring them back. Again the top row of thumbnails would go away, Select and candidate would reappear, try again, and give up. This went on for at least 2-3 minutes before I tried to choose File and Exit, but even that did not initially want to respond. It doesn't like to accept other commands when it's trying to open Compare View. Finally it allowed me to exit.
To experiment I created a new catalog of 1100 images. After 30-40 minutes, the Compare View function began to operate very slowly. With left and right side panels visible and two thumbnails highlighted, hitting Compare View can take half a minute before the two mid-size images open in their respective SELECT and CANDIDATE windows. When the side panels are open and two images are in the Select/Candidate spaces, hitting the Tab button to close the side panels produces a very delayed response--25-30 seconds to close them, a few more seconds to enlarge the two images to full size. To reverse the process (i.e., to recall the two side panels), hitting Tab would make the two sides of the screen go black for up to a minute, with no words visible. Eventually the info fields in the panels would open up.
I also created a new user account and imported a folder of 160 images. After half an hour Compare View began mis-placing data. (I have a screen shot to show this.) CANDIDATE appears on the left side of SELECT, whereas it should be on the right. The accompanying camera exposure data appears almost entirely to the left of the mid-screen dividing line. Although the Candidate and Select headings were transposed, the image exposure data was not, but the data for the image on the right was almost entirely to the left of the line dividing the screen in two.
Gurus in The Lightroom Forum have examined Task Manager data showing Processes running and Performance indicators and they see nothing wrong. I could also send screen shots of this data.
At this point, the only way I can process my images is to work 30-40 minutes and then shut down everything, exit, and re-start LTR. This is not normal. I hope you can find the cause, and then the solution. If you would like to see my screen shots, tell me how to submit them.
Ollie
[email protected] -
Two problems, disconnecting and extremely slow internet at a certain time of the day.
My first problem started to occur since the beginning of this year, after I've upgraded from 1MB/s to 3MB/s. EVERYDAY at 2:39 PM EST or sometime around there, my internet would disconnect (most common at 2:39). It would take some 5-20 minutes to reconnect by itself. I go to 192.168.1.1 and go to broadband connection and press disconnect, then reconnect to get myself back on asap. It would take me a few tries disconnecting and connecting to get the internet back up. I probably do disconnect during other times of the day, such as night time but I don't notice it as much because I am not using the computer at the time.
My second problem is slow download speed at night. As I said, I have a 3000/667 kb/s connection. My internet connection speed is normal during the day time .. but when I ran a speed test during night time, I get around 333 kb/s download and 600 kb/s upload. So, my download speed drops significantly at night and my upload speed is normal.
I am using a D90-327W15-06 modem and I am not using a wireless connection.
Margin (dB) 14.5 11.0
Line Attenuation (dB) 40.0 23.0
Transmit Power (dBm) 18.4 11.9
Don't know if that information helps ..
P.S Sorry if this is a lot to read, I wanted it to be as much detailed as possible.#1 Is wireless in the router enabled?
#2 If so, to question number one above: What level of wireless security is it set to ( WEP / WPA )?
#3 Did you try connecting your modem to the NID?
If not, please do that - and recheck those stats.
If you do not what a NID is, see http://www.dslreports.com/faq/1317
If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button. -
Network unusable during portions of the day
The LTE coverage in my town was awesome when it was first introduced, but now it can slow to a halt many times during the day. The XLTE didn't seem to help it at all. It is completely frustrating to have data hang. I've contacted technical support and it was acknowledged that there are usage spikes during the day which affect performance. I was told there are no plans for improvement.
Is there any way to get the issue escalated? What can be done?Here are some more speed tests from today and yesterday.
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i 4 is hanging multiple times during the day / restarting. i have reset, reinstalled IOS7, the prob persists. taken to the pphone to the service centre. they reset it too. the problem stands. whatr to do next???
Hi Suzy Q,
I can send and receive calls.
I get "messaging stopped" when doing a lot of texts.
Texts come up "ghosted" meaning they have the text on the bottom and a transparent one overlaid on top. they then become one. But I get the ghosting most of the time when I go into a message from a contact to send a text.
When I go to call logs or text logs, the numbers come up first, and then then the names pop up randomly, meaning not in order down the page, until they are all shown. lots of lag time.
It runs slow.
I have 5 apps on here. I should be able to have a lot of apps on here, and play music, and have files, and...and....and.
I can get online but doing a Google search, when the page with the choices comes up, it is blurred and I have to tap on the screen for it to become clear and readable.
When online and scrolling, it hitches sometimes/lags/gets stuck then unstuck
I get VZWAVS has stopped. (not sure if those are the right letters)
The status bar that is supposed to be gray with the new update, goes back and forth between green--the old os--to gray. And I have found no continuity with when I get green or when I get gray.
I get a black screen on occasion.
sometimes the proximity sensor doesn't work.
sometimes when I have my bluetooth on and have "hands free mode" on, I get the a text message read through the headset and also through the handset.
I soft reboot often--turn it off wait a bit and
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