Fusion Middleware Control Help for WebLogic Server

Server Template: Configuration: Tuning

Configuration Options     Advanced Configuration Options     

Use this page to tune the performance and functionality of this server template.

Configuration Options

Name	Description
Enable Native IO	Specifies whether native I/O is enabled for the server. MBean Attribute: ServerMBean.NativeIOEnabled Changes take effect after you redeploy the module or restart the server.
JavaSocketMuxer Socket Readers	The percentage of execute threads from the default queue that can be used as socket readers. MBean Attribute: ServerMBean.ThreadPoolPercentSocketReaders Minimum value: 1 Maximum value: 99
Enable Gathered Writes	Enables gathered writes over NIO socket channels. Enabling this attribute increases efficiency during I/O in environments with high network throughput and should be used only when configuring a WebLogic domain for Oracle Exalogic. MBean Attribute: KernelMBean.GatheredWritesEnabled Changes take effect after you redeploy the module or restart the server.
Enable Scattered Reads	Enables scattered reads over NIO socket channels. Enabling this attribute increases efficiency during I/O in environments with high network throughput and should be used only when configuring a WebLogic domain for Oracle Exalogic. MBean Attribute: KernelMBean.ScatteredReadsEnabled Changes take effect after you redeploy the module or restart the server.
Maximum Open Sockets	The maximum number of open sockets allowed in server at a given point of time. When the maximum threshold is reached, the server stops accepting new requests until the number of sockets drops below the threshold. A value less than 0 indicates an unlimited size. MBean Attribute: ServerMBean.MaxOpenSockCount Minimum value: -1 Maximum value: 2147483647
Stuck Thread Max Time	The number of seconds that a thread must be continually working before this server considers the thread stuck. For example, if you set this to 600 seconds, WebLogic Server considers a thread to be "stuck" after 600 seconds of continuous use. In WebLogic Server 9.x and later, it is recommended that you use the ServerFailureTriggerMBean in the OverloadProtectionMBean. The ServerFailureTriggerMBean transitions the server to a FAILED state after the specified number of stuck threads are detected. The OverloadProtectionMBean has options to suspend or shutdown a failed server. MBean Attribute: ServerMBean.StuckThreadMaxTime Minimum value: 0 Maximum value: 2147483647 Changes take effect after you redeploy the module or restart the server.
Stuck Thread Timer Interval	The number of seconds after which WebLogic Server periodically scans threads to see if they have been continually working for the configured maximum length of time. MBean Attribute: ServerMBean.StuckThreadTimerInterval Minimum value: 0 Maximum value: 2147483647 Changes take effect after you redeploy the module or restart the server.
Accept Backlog	The number of backlogged, new TCP connection requests that should be allowed for this server's regular and SSL ports. Setting the backlog to 0 may prevent this server from accepting any incoming connection on some operating systems. MBean Attribute: ServerMBean.AcceptBacklog Minimum value: 0
Login Timeout	The login timeout for this server's default regular (non-SSL) listen port. This is the maximum amount of time allowed for a new connection to establish. A value of 0 indicates there is no maximum. MBean Attribute: ServerMBean.LoginTimeoutMillis Minimum value: 0 Maximum value: 100000 Secure value: 5000
SSL Login Timeout	Specifies the number of milliseconds that WebLogic Server waits for an SSL connection before timing out. SSL connections take longer to negotiate than regular connections. If clients are connecting over the Internet, raise the default number to accommodate additional network latency. MBean Attribute: SSLMBean.LoginTimeoutMillis Minimum value: 1 Maximum value: 2147483647
Reverse DNS Allowed	Specifies whether the kernel is allowed to perform reverse DNS lookups. MBean Attribute: ServerMBean.ReverseDNSAllowed

Advanced Configuration Options

Name	Description
Self Tuning Thread Minimum Pool Size	Get the minimum thread pool size of the self-tuning thread pool. The self-tuning thread pool starts with the default size of 1. It grows and shrinks automatically as required. Setting this attribute changes the default minimum pool size. The thread count will never shrink below this value. It can add threads to improve throughput but will never decrease below the set minimum.
Self Tuning Thread Maximum Pool Size	Sets the maximum thread pool size of the self-tuning thread pool. The self-tuning thread pool starts with the default size of 1. It grows and shrinks automatically as required. Setting this attribute changes the default maximum pool size. The active thread count will never increase beyond this value. This value defines the maximum number of threads permitted in the server. Note that the server will add threads only if it improves throughput. Measurements are taken every two seconds and the decision to increase or decrease the thread count is based on the current throughput measurement versus past values.
Managed Server Independence Enabled	Specifies whether this Managed Server can be started when the Administration Server is unavailable. In such a case, the Managed Server retrieves its configuration by reading a configuration file and other files directly. MBean Attribute: ServerMBean.ManagedServerIndependenceEnabled Secure value: true Changes take effect after you redeploy the module or restart the server.
Period Length	The time interval in milliseconds of the heartbeat period. A value of 0 indicates that heartbeats are turned off. MBean Attribute: ServerMBean.PeriodLength Minimum value: 0 Changes take effect after you redeploy the module or restart the server.
Idle Periods Until Timeout	The number of idle periods until peer is considered unreachable. MBean Attribute: ServerMBean.IdlePeriodsUntilTimeout Minimum value: 4 Maximum value: 65534 Changes take effect after you redeploy the module or restart the server.
DGC Idle Periods Until Timeout	The number of idle periods allowed before the object is collected. MBean Attribute: ServerMBean.DGCIdlePeriodsUntilTimeout Changes take effect after you redeploy the module or restart the server.
Muxer Class	Non-blocking IO is enabled by default on the server side. The default value is weblogic.socket.NIOSocketMuxer. The Certicom SSL implementation is not supported with NIOSocketMuxer. If you need to secure internet communication, Oracle recommends enabling JSSE (Java Secure Socket Extension). MBean Attribute: ServerMBean.MuxerClass Changes take effect after you redeploy the module or restart the server.
Use Concurrent Queue For Request Manager	Reduces lock contention by using concurrent buffer queue to park incoming requests. Enabling this attribute increases throughput as requests are scheduled without acquiring any locks. MBean Attribute: KernelMBean.UseConcurrentQueueForRequestManager Changes take effect after you redeploy the module or restart the server.