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Date/Time: Thu, 07 Jul 2022 17:40:46 +0000



Newer versions of SC

View Count: 1033

[2013-12-20 20:08:19]
SgtJ - Posts: 154
Do the more recent SC versions save/write scid files to disk using a different (more lax) algorithm? Version 997 writes/saves files every ~minute. Version 1061 hasn't saved a file for a few days...at least based on the explorer modified date. If so is this adjustable?

Edit: Just noticing my memory usage is way up too. From ~1.2g to ~4.5g total system usage.
Date Time Of Last Edit: 2013-12-20 20:11:36
[2013-12-20 21:41:25]
Sierra Chart Engineering - Posts: 103702
The actual saving of data written to disk is handled by the operating system.

One difference in the newer versions is when an Intraday data file is opened by a chart, it remains open. This is helpful when people are using Sierra Chart on Linux and also if users have antivirus software running.

This could also possibly lead to increased memory use because the operating system is probably caching the data read from the files and not releasing that until the file is closed. It is not Sierra Chart using that large amount of additional memory itself. Newer versions will use some amount of additional memory, but it is more like a megabyte per chart.
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: 2013-12-20 21:41:48
[2014-01-13 06:58:22]
Kiwi - Posts: 371
Can I please check my understanding.

Are you saying that:

Sierrachart opens an SCID file when a relevant chart is opened. When data is received from IB the file in RAM is updated but nothing is updated on the disk.


I am just watching my HSI Files (Debian Jessie x64 with SC 1068 running under wine on a ramdisk) and the files seem to update at least every 5 seconds (the rate at which the TD data is arriving).
Date Time Of Last Edit: 2014-01-13 07:01:37
[2014-01-13 07:53:17]
Sierra Chart Engineering - Posts: 103702
Data is written to the chart data files at the same rate that the chart is being updated at. Or at one 1 second intervals. Whichever is smaller.

Of course whether the OS actually does a commit to disk, is up to the OS.
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: 2014-01-14 09:16:00
[2014-01-14 04:28:18]
SgtJ - Posts: 154
Why would the OS treat versions 997 and 1061+ so differently w/ regard to committing to disk...same pc/os.



[2014-01-14 08:28:30]
Rusty - Posts: 38
@Sierra Chart Engineering:
...Or at one 1 intervals...

Is that 1 second or 1 minute intervals? Thank you.
[2014-01-14 09:17:17]
Sierra Chart Engineering - Posts: 103702
We meant 1 second intervals. The dictation software did not pick up the word.

Writing data to the OS file is done less frequently for performance reasons. For example, we do not want to make 1000 file writes if we get a big burst of trades in. Now they are written in one block. This definitely does make a difference. We especially notice a difference in our server environments.
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: 2014-01-14 09:17:41

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