Where can I find a graph of average transactions per block over time?

Quote from: phatsphere on September 29, 2011, 09:05:35 PM

Hi, I'm searching for a graph that displays transactions per block over time, but where the number of transactions is normalized by the time it took to generate each block. is there something like that available?

There is a per-day chart:



There is an average transactions per block statistic (previous 1,000 blocks):
- http://blockexplorer.com/q/avgtxnumber

But specifically a transactions per block, I've not seen that charted.
The data is visible from a site:
- http://pi.uk.com/bitcoin/blocks
and also from:
- http://abe.john-edwin-tobey.org/chain/Bitcoin?count=2016
(which comes from ABE which can store the data in MySQL, PostgreSQL and elsewhere):
- http://bitcointalk.org/index.php?topic=16141.0

So to go that further and graph it by the amount of time for the block is something you're probably the first...

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The general wisdom seems to be that the Bitcoin network can currently sustain 7 transactions per second. Bitcoin advocates often worry that this will be a limiting factor when credit card processing networks can handle several orders of magnitude more transactions in the same time, but what are the actual statistics related to Bitcoin transaction processing? Our Bitcoin mine train may not be seeing its hashing engines running away quite as much as they were earlier this year, but are we heading for other problems instead?

Bitcoin Transactions Per Day

Before we can really think about Bitcoin transaction processing we need to look at how its transaction processing has evolved over time. Let's start by looking at the numbers of transactions per day for approximately the last 4 years:

As with all of our Bitcoin rollercoaster rides there are highs and lows, but the trend is generally up over time. It may not be the sort of exponential growth seen with the...

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On this page:

Related pages:

This topic is a describes a subset of the metrics in the AppDynamics UI. Most metrics are self explanatory; however, this document explains certain metrics frequently asked about. Metrics are displayed in various places, including dashboard flow maps and tabs, the Metric Browser, and the Business Transactions list.

Common Metrics

The following metrics can be found in more than one location, such as the Business Transactions list, Node Dashboard, and Metrics Browser.

Where found:

Business Transactions > Business Transactions list > View Options > Slow/Stalled Requests > Block Time (ms) Metric Browser > Business Transaction Performance > Business Transaction Groups > group > business transaction > Average Block Time (ms)Metric Browser > Business Transaction Performance > Business Transactions > tier > business transaction > Average Block Time (ms)Metric Browser > Business Transaction Performance > Business...
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April 28, 2005 - 7:47 am UTC

I think you have that backwards.

I know you have that backwards.

When you commit, you must wait. You must wait for lgwr to flush the redo log to disk.

committing after each tuple is painfully slow. Working on expert one on one Oracle yesterday and just redid an example. So, here is some fancy dancy Java code I wrote:

import java.sql.*;
import oracle.jdbc.OracleDriver;
import java.util.Date;
public class perftest
public static void main (String arr[]) throws Exception
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
Connection con = DriverManager.getConnection
"scott", "tiger");

Integer iters = new Integer(arr[0]);
Integer commitCnt = new Integer(arr[1]);

doInserts( con, iters.intValue(), commitCnt.intValue() );...

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Question: I need to measure the number of transactions per second on my Oracle database. Where can I find the Oracle transactions per second performance metric?

Answer: First, let's define transactions per second (TPS), and see how it's different for different server components. To Oracle, a transaction is a SQL statement:

Disk transactions per second - To a disk, the number of transactions per second is the number of I/O requests (usually a block). See my notes for using the iostat utility for details on measuring disk transactions per second. OS transactions per second - To the Operating system, a transaction is the creation and destruction of a "process" (in UNIX/Linux) or a "thread" (in Windows). Note that a database transaction (a SQL statement) may have many associated OS processes (Oracle background processes). Oracle transactions per second - The Oracle documentation has the "Transactions/Sec" defined as the number of commits (successful SQL) and...
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Hello everybody, I already searched for a similar topic, but I couldn't find it.

I guess my question about Paraview (3.4.0, Win version) is rather simple for you, but I didn't find any tip about it neither on the web.

I am dealing with a fluid-structure interaction problem for hemodynamics. First step of my work is a fluid flow in a straight tube. I imported in Paraview a *.case file containing pressure, velocity and displacement data of every node of a mesh over 100 time steps. Now I have to plot pressure and flow rate (volume per second) over time for several sections of the tube. How can I do it?

I used "Slice" filter to select my sections of interest, but I don't understand how filters like "Integrate variables" or "Plot ... over time" work.

Can anybody help me (even with links to useful online tutorials, for example)?

Thanks a lot

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I recommend if you can, keeping it simple as in the following:

| timechart max(response_time) min(response_time) avg(response_time)

The reason being that the FlashChart module in the UI has a limit of some number of rows past which it will truncate, and also that the performance of the flash pulling down that much data at all can make for a clunky experience.

The other reason for this, is that we changed some things that made it possible to do scatter charts where time was NOT the x-axis, and in so doing made it quite difficult to actually do the cases where time IS the x-axis. (timechart is your friend).

Go to the "advanced charting" view, and run a search like:

index=_internal source=*metrics.log group=per_sourcetype_thruput series=splunkd | rename _time as time | fields time eps

over the last 60 minutes.

(the renaming of _time to time is to dodge a bug where 'scatter' charts with time series data are always blank)

-- change 'chart type'...

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Total Passed is the total of the Pass column. The number of transactions Passed and Failed is the total count of every action defined in the script, multiplied by the number of vusers, further multiplied by the number of repetitions, and also multiplied by the number of iterations.

The numbers to the left of the Pass column are the number of seconds. The Minimum, Average, Maximum columns are illustrated in the Transaction Performance Summary graph.

When analyzing the number of seconds, beware of totaling up all transaction times because that would duplicate the time of actions nested within summary actions.

Average Response Time

Transaction Name


This is the fastest time


This is the arithmetic mean


This is the slowest time


"Std." is an abbreviation of the word "Standard", so called because the mathematical technique used to...
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JMeter supports dashboard report generation to get graphs and statistics from a test plan.
This chapter describes how to configure and use the generator.

14.1 Overview¶

The dashboard generator is a modular extension of JMeter. Its default behavior is to read and process samples from CSV files to generate HTML files containing graph views. It can generate the report at end of a load test or on demand.

This report provides the following metrics:

APDEX (Application Performance Index) table that computes for every transaction the APDEX based on configurable values for tolerated and satisfied thresholds A request summary graph showing the Success and failed requests (Transaction Controller Sample Results are not taken into account) percentage: A Statistics table providing in one table a summary of all metrics per transaction including 3 configurable percentiles : An error table...
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Transaction data is permanently recorded in files called blocks. They can be thought of as the individual pages of a city recorder's recordbook (where changes to title to real estate are recorded) or a stock transaction ledger. Blocks are organized into a linear sequence over time (also known as the block chain). New transactions are constantly being processes by miners into new blocks which are added to the end of the chain and can never be changed or removed once accepted by the network (although some software will remove orphaned blocks).

Block structure


Each block contains, among other things, a record of some or all recent transactions, and a reference to the block that came immediately before it. It also contains an answer to a difficult-to-solve mathematical puzzle - the answer to which is unique to each block. New blocks cannot be submitted to the network without the correct answer - the process of "mining" is essentially the process of...

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If you make any attempt at reading investment and financial books, you will begin to realize that investing is now the name of the game (don’t bother with the “I need a raise” approach to wealth). Blue Chip Companies are probably one of your best bets to achieving prosperity (think about it… what has your job done for you lately?). And, while unemployment is still high, large companies are thriving! How can that be? The lower and middle classes don’t have any money.

The huge profits that large companies make are a combination of products sold in huge volumes… cheap labor… cheap materials… and lack of regard for their dominion of easily replaced workers who often do the work of more than one. Complain about anything and you’re history – – your single-skilled talent is easily replaced by a younger and financially hungrier novice. Few are the days of quality high-tech workers – – we live in an environment where products, perfected or not, get into the market and onto store...

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From my personal experience of discussions with consultants and developers, implementing Dynamics AX, issues related to costing and an inventory closing became one of main pain-points of an implementation process. Peoples tends to treat an inventory closing as a kind of black box, which, depending from phase of the moon, can produces different result and or require different time to run for a same dataset. To my opinion, it is caused by costing information being scattered across various parts of the documentation. In addition, some peculiarities of costing are not described at all and should be learned in a hard way with trial and error approach or by learning of X++ code of an inventory costing.

In this article I am trying to provide reasonably detailed description of an inventory closing and also I am discussing some other costing related issues.

This document is intended for more or less experienced consultants, who already knew a general architecture of the Trade...

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