Support Board
Date/Time: Sat, 18 Jan 2025 10:48:25 +0000
[Locked] - Charts lagging on extreme active periods
View Count: 1737
| [2018-02-08 03:31:01] |
| TechTrader - Posts: 116 |
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On Monday my charts were lagging by about 30 seconds. As a Transact client I am aware of the changes that you made on the data feed some months ago.(Which is much better now) If I assume correctly, the chart feed is now a LIVE trading feed with Sierra Charts controlling 'LIVE' or 'SIMULATED' modes. The Transact trading DOM which was also open on the same computer with the same internet connection (25 mps download/5 mbs upload) did not exhibit this lag. I am NOT a programmer and please do not take this as criticism but may I suggest that if the data servers were NOT overloaded and lagging that sampling the incoming RAW data at several times per second and processing and charting the resultant sampled rate could result in non lagging charts during extreme active periods. I know that this is not true unfiltered data and would not satisfy some, but possibly a practical solution. Even dual sampling, ie. sample the raw data and then sample the result. I repeat, this is NOT criticism in any way but a genuine desire to suggest an idea that your programming team could look at. Regards Tech Trader |
| [2018-02-08 04:12:48] |
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As a Transact client I am aware of the changes that you made on the data feed some months ago.(Which is much better now) For lagging data, refer to help topic 4: Http://www.sierrachart.com/index.php?page=doc/helpdetails4.html This is not an issue within Sierra Chart. To avoid the lag use the Sierra Chart Exchange Data Feed: Sierra Chart Exchange Data Feed If you knew how Sierra Chart is actually internally designed to work with the data feeds, you would realize there is simply 0% chance whatsoever this could be on the Sierra Chart side. It simply is not. We have our own data feed which will not lag you can see that for yourself. We did have one user, no one else, point out an occasional <1-2 second lag during very very heavy periods, but we already addressed that yesterday. And we will be releasing further improvements, next week. But you will not benefit from this whatsoever unless you use this feed. This paragraph applies to our own data feed. Not to the TransAct feed. And that lag was never verified by us, we just accepted what they said. Now you can understand, why it is, our job is so difficult when these kind of problems are just getting dumped on us when they are simply not. And this is complicated further when users think they can be intelligent from their perspective and think they figure out the source of the problem when in fact they are totally wrong on that. The reason you see a difference on the TransAct software is because it is using the UDP protocol. When you look through this board, you will see nobody using the Sierra Chart Exchange Data Feed who is mentioning any kind of lag issue these last few days. Other than that one user and we are not totally certain of the origin of the problem in their case. We never noticed any lag. But nevertheless, we do all we can to address something even though we do not notice it ourselves. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, *change* to the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2018-02-08 04:42:02
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| [2018-02-08 04:20:38] |
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Do you also realize, that our backend CME multicast feed processing is Sierra Chart. That is handling a very high data rate feed tracking anywhere from 3000 to 55,000 symbols per instance. And on top of that recording the tick by tick intraday data over a period of years for rapid serving. There is no lag whatsoever. It just does not happen. Sierra Chart is the backend infrastructure for the Sierra Chart Exchange Data Feed serving over 500 realtime users at a time. There is no lagging. And if there is any lag, it would not be in Sierra Chart itself, but really within our real-time server process, and that is primarily where the performance improvements have been made, by the removal of unnecessary symbol ID mapping. And those processes, handle anywhere from 50,000 to 250,000 symbols simultaneously and delivering data to hundreds of users instantly. By comparison the TransAct network is basically about 200-300 symbols. So you can see just how fast and capable our software actually is. Drastically higher data rates and symbols, and no lag. But none of this post, has any relevancy whatsoever to the TransAct data feed. We are simply referring to our own data feed. Other than the prior paragraph. Update: 2019-02: We may have made significant performance improvements with market data processing and real-time data serving in our backend infrastructure. This is all running very optimally at this time but once again this is not related to the problem that you had. These changes, are there to ensure that there is not even lag within the millisecond range. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, *change* to the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2019-02-17 02:19:00
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| [2018-02-08 04:47:33] |
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When we talk about in this post "lunacy": What is Sierra Chart Working On | Post: 139357 It is exactly about the types of problems you are encountering, although a lot of other wide-ranging things as well, and how it gets dumped on us, and nothing we can do about it. Other than if you want to use our own data feed. This is why, we have to see a different direction for Sierra Chart, the model we are operating under is not viable longer-term for us. We are always going to continue to support to the extent we can our major brokerage customers, but the overall situation driven by the absurd policies exchanges, is totally taken us beyond the breaking point. But as you can see we do a superb job and provide a superb data feed. What we are really referring to, is the absurdity we put up with everyday with problems that are not within our control. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, *change* to the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2019-02-17 02:19:29
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