D initialization parameters

The Oracle database initialization parameters in the init. The gateway initialization parameter file must be available when the gateway is started.

This appendix contains a list of the gateway initialization parameters that can be set for each gateway and their description. It also describes the initialization parameter file syntax. It includes the following sections:. If there is a syntax error in an initialization parameter file, none of the settings take effect. It is a string of characters starting with a letter and consisting of letters, digits and underscores. Initialization parameter names are case sensitive.

It is case sensitive. An initialization parameter value is either:. A string of characters that does not contain any backslashes, white space or double quotation marks ". A quoted string beginning with a double quotation mark and ending with a double quotation mark.

d initialization parameters

The following can be used inside a quoted string:. A backslash at the end of the line continues the string on the next line.

d initialization parameters

If a backslash precedes any other character then the backslash is ignored. You cannot use either as an initialization parameter name. SET specifies that, in addition to being used as an initialization parameter, the parameter value is set as an environment variable for the agent process.

Use SET for parameter values that the drivers or non-Oracle system need as environment variables. Most initialization parameters should not be private. If, however, you are storing sensitive information like a password in the initialization parameter file, then you may not want it uploaded to the server because the initialization parameters and values are not encrypted when uploaded.The Oracle database initialization parameters in the init. The gateway initialization parameter file must be available when the gateway is started.

This appendix contains a list of the gateway initialization parameters that can be set for each gateway and their description.

It also describes the initialization parameter file syntax. It includes the following sections:. If there is a syntax error in an initialization parameter file, none of the settings take effect.

It is a string of characters starting with a letter and consisting of letters, digits and underscores. Initialization parameter names are case sensitive. It is case sensitive. An initialization parameter value is either:. A string of characters that does not contain any backslashes, white space or double quotation marks ". A quoted string beginning with a double quotation mark and ending with a double quotation mark. The following can be used inside a quoted string:.

A backslash at the end of the line continues the string on the next line. If a backslash precedes any other character then the backslash is ignored.

You cannot use either as an initialization parameter name. SET specifies that, in addition to being used as an initialization parameter, the parameter value is set as an environment variable for the agent process. Use SET for parameter values that the drivers or non-Oracle system need as environment variables.

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Most initialization parameters should not be private. If, however, you are storing sensitive information like a password in the initialization parameter file, then you may not want it uploaded to the server because the initialization parameters and values are not encrypted when uploaded.

Making the initialization parameters private prevents the upload from happening and they do not appear in dynamic performance views. Use PRIVATE for the initialization parameters only if the parameter value includes sensitive information such as a user name or password.

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SET PRIVATE specifies that the parameter value is set as an environment variable for the agent process and is also private not transferred to the Oracle database, not appearing in dynamic performance views or graphical user interfaces.

They are as follows:. The following sections describe all the initialization file parameters that can be set for gateways. Specifies a unique network sub-address for a non-Oracle system.

Specifies a unique hexadecimal number identifying the instance to which the Heterogeneous Services agent is connected. This parameter's value is used as part of a transaction ID when global name services are activated. Specifying a nonunique number can cause problems when two-phase commit recovery actions are necessary for a transaction.

Specifies a unique alphanumeric name for the data store given to the non-Oracle system.The Oracle database initialization parameters in the init. The gateway initialization parameter file must be available when the gateway is started. This appendix contains a list of the gateway initialization parameters that can be set for each gateway and their description. It also describes the initialization parameter file syntax. It includes the following sections:.

If there is a syntax error in an initialization parameter file, none of the settings take effect. It is a string of characters starting with a letter and consisting of letters, digits and underscores. Initialization parameter names are case sensitive. It is case sensitive. An initialization parameter value is either:.

d initialization parameters

A string of characters that does not contain any backslashes, white space or double quotation marks ". A quoted string beginning with a double quotation mark and ending with a double quotation mark. The following can be used inside a quoted string:. A backslash at the end of the line continues the string on the next line.

If a backslash precedes any other character then the backslash is ignored. You cannot use either as an initialization parameter name. SET specifies that, in addition to being used as an initialization parameter, the parameter value is set as an environment variable for the agent process.

Use SET for parameter values that the drivers or non-Oracle system need as environment variables. Most initialization parameters should not be private. If, however, you are storing sensitive information like a password in the initialization parameter file, then you may not want it uploaded to the server because the initialization parameters and values are not encrypted when uploaded.

Making the initialization parameters private prevents the upload from happening and they do not appear in dynamic performance views. Use PRIVATE for the initialization parameters only if the parameter value includes sensitive information such as a user name or password. SET PRIVATE specifies that the parameter value is set as an environment variable for the agent process and is also private not transferred to the Oracle database, not appearing in dynamic performance views or graphical user interfaces.

They are as follows:. The following sections describe all the initialization file parameters that can be set for gateways. Specifies a unique network sub-address for a non-Oracle system.

Specifies a unique hexadecimal number identifying the instance to which the Heterogeneous Services agent is connected.

d initialization parameters

This parameter's value is used as part of a transaction ID when global name services are activated. Specifying a nonunique number can cause problems when two-phase commit recovery actions are necessary for a transaction.

Specifies a unique alphanumeric name for the data store given to the non-Oracle system.

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This name identifies the non-Oracle system within the cooperative server environment. Specifies the maximum number of entries in the describe cache used by Heterogeneous Services.

This limit is known as the describe cache high water mark. The cache contains descriptions of the mapped tables that Heterogeneous Services reuses so that it does not have to re-access the non-Oracle data store. If you are accessing many mapped tables, increase the high water mark to improve performance.

Increasing the high water mark improves performance at the cost of memory usage. Provides Heterogeneous Services with character set, language, and territory information of the non-Oracle data source. The value must use the following format:.There are three kinds of optimization algorithms:.

Coding Neural Network — Parameters’ Initialization

Each image is pixels x pixels on RGB color scale. Therefore, we would have 67, features where each column in the input matrix would be one image which means our input data would have 67, x dimension. That is because of symmetry between all neurons which leads to all neurons have the same update on every iteration. Therefore, regardless of how many iterations we run the optimization algorithms, all the neurons would still get the same update and no learning would happen.

As a result, we must break symmetry when initializing parameters so that the model would start learning on each update of the gradient descent. Random initialization here is helping but still the loss function has high value and may take long time to converge and achieve a significantly low value.

The same would apply to test error rate if we had test data. Deep Learning frameworks make it easier to choose between different initialization methods without worrying about implementing it ourselves.

Below are some key takeaways:.

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How to initialize objects by using an object initializer (C# Programming Guide)

A Medium publication sharing concepts, ideas, and codes.Initialization can have a significant impact on convergence in training deep neural networks. Simple initialization schemes have been found to accelerate training, but they require some care to avoid common pitfalls. In this post, we'll explain how to initialize neural network parameters effectively.

Here is a common training process for neural networks:. To illustrate this, consider the three-layer neural network below. You can try initializing this network with different methods and observe the impact on the learning. Select an initialization method for the values of your neural network parameters. Initializing all the weights with zeros leads the neurons to learn the same features during training. In fact, any constant initialization scheme will perform very poorly.

Thus, both hidden units will have identical influence on the cost, which will lead to identical gradients. Thus, both neurons will evolve symmetrically throughout training, effectively preventing different neurons from learning different things.

What do you notice about the cost plot when you initialize weights with values too small or too large? Despite breaking the symmetry, initializing the weights with values i too small or ii too large leads respectively to i slow learning or ii divergence. Choosing proper values for initialization is necessary for efficient training.

We will investigate this further in the next section. At every iteration of the optimization loop forward, cost, backward, updatewe observe that backpropagated gradients are either amplified or minimized as you move from the output layer towards the input layer.

This result makes sense if you consider the following example. Assume all the activation functions are linear identity function.

Then the output activation is:. What would be the outcome of initialization values that were too small, too large or appropriate? When these activations are used in backward propagation, this leads to the exploding gradient problem. That is, the gradients of the cost with the respect to the parameters are too big. This leads the cost to oscillate around its minimum value. Similarly, consider the case where every weight is initialized slightly smaller than the identity matrix.

When these activations are used in backward propagation, this leads to the vanishing gradient problem. The gradients of the cost with respect to the parameters are too small, leading to convergence of the cost before it has reached the minimum value.

All in all, initializing weights with inappropriate values will lead to divergence or a slow-down in the training of your neural network.You can use object initializers to initialize type objects in a declarative manner without explicitly invoking a constructor for the type. The following examples show how to use object initializers with named objects.

The compiler processes object initializers by first accessing the parameterless instance constructor and then processing the member initializations. Therefore, if the parameterless constructor is declared as private in the class, object initializers that require public access will fail.

You must use an object initializer if you're defining an anonymous type. For more information, see How to return subsets of element properties in a query. The following example shows how to initialize a new StudentName type by using object initializers.

This example sets properties in the StudentName type:. Object initializers can be used to set indexers in an object. The following example defines a BaseballTeam class that uses an indexer to get and set players at different positions.

The initializer can assign players, based on the abbreviation for the position, or the number used for each position baseball scorecards:.

Skip to main content. Contents Exit focus mode. Example The following example shows how to initialize a new StudentName type by using object initializers. WriteLine student1. ToString ; Console. WriteLine student2.

Oracle DB - SPFILE \u0026 PFILE

WriteLine student3. WriteLine student4. Yes No. Any additional feedback? Skip Submit. Submit and view feedback for This product This page. View all page feedback. Is this page helpful?The Oracle database initialization parameters in the init. The gateway initialization parameter file must be available when the gateway is started.

This appendix contains a list of the gateway initialization parameters that can be set for each gateway and their description.

It also describes the initialization parameter file syntax. It includes the following sections:. If there is a syntax error in an initialization parameter file, none of the settings take effect. It is a string of characters starting with a letter and consisting of letters, digits and underscores. Initialization parameter names are case sensitive. It is case sensitive. An initialization parameter value is either:. A string of characters that does not contain any backslashes, white space or double quotation marks ".

A quoted string beginning with a double quotation mark and ending with a double quotation mark. The following can be used inside a quoted string:. A backslash at the end of the line continues the string on the next line. If a backslash precedes any other character then the backslash is ignored.

Initializing neural networks

You cannot use either as an initialization parameter name. SET specifies that, in addition to being used as an initialization parameter, the parameter value is set as an environment variable for the agent process.

Use SET for parameter values that the drivers or non-Oracle system need as environment variables. Most initialization parameters should not be private. If, however, you are storing sensitive information like a password in the initialization parameter file, then you may not want it uploaded to the server because the initialization parameters and values are not encrypted when uploaded.

Making the initialization parameters private prevents the upload from happening and they do not appear in dynamic performance views. Use PRIVATE for the initialization parameters only if the parameter value includes sensitive information such as a user name or password.

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SET PRIVATE specifies that the parameter value is set as an environment variable for the agent process and is also private not transferred to the Oracle database, not appearing in dynamic performance views or graphical user interfaces.

This section lists all the initialization file parameters that can be set for the Oracle Database Gateway for Sybase.


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