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Servers: Configuration: Tuning

Configuration Options Advanced Configuration Options Related Tasks Related Topics

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

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.
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`
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 Web Logic 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`
Low Memory GC Threshold	The threshold level (in percent) that this server uses for logging low memory conditions and changing the server health state to `Warning`. For example, if you specify 5, the server logs a low memory warning in the log file and changes the server health state to `Warning` after the average free memory reaches 5% of the initial free memory measured at the server's boot time. MBean Attribute: `ServerMBean.LowMemoryGCThreshold` Minimum value: `0` Maximum value: `99` Secure value: `5` Changes take effect after you redeploy the module or restart the server.
Low Memory Granularity Level	The granularity level (in percent) that this server uses for logging low memory conditions and changing the server health state to `Warning`. For example, if you specify 5 and the average free memory drops by 5% or more over two measured intervals, the server logs a low memory warning in the log file and changes the server health state to `Warning`. MBean Attribute: `ServerMBean.LowMemoryGranularityLevel` Minimum value: `1` Maximum value: `100` Secure value: `5` Changes take effect after you redeploy the module or restart the server.
Low Memory Sample Size	The number of times this server samples free memory during the time period specified by LowMemoryTimeInterval. Increasing the sample size can improve the accuracy of the reading. MBean Attribute: `ServerMBean.LowMemorySampleSize` Minimum value: `1` Maximum value: `2147483647` Changes take effect after you redeploy the module or restart the server.
Low Memory Time Interval	The amount of time (in seconds) that defines the interval over which this server determines average free memory values. By default, the server obtains an average free memory value every 3600 seconds. This interval is not used if the JRockit VM is used, as the memory samples are collected immediately after a VM-scheduled garbage collection. Taking memory samples after a garbage collection gives a more accurate average value of the free memory. MBean Attribute: `ServerMBean.LowMemoryTimeInterval` Minimum value: `300` Maximum value: `2147483647` Changes take effect after you redeploy the module or restart the server.

Advanced Configuration Options

Name	Description
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.
MSI File Replication Enabled	Specifies whether the Administration Server replicates its configuration files to this Managed Server. With file replication enabled, the Administration Server copies its configuration file and `SerializedSystemIni.dat` into the Managed Server's root directory every 5 minutes. This option does not replicate a boot identity file. Regardless of the name of the configuration file that you used to start the Administration Server, the replicated file is always named `msi-config.xml`. For example, if you specified `-Dweblogic.ConfigFile=MyConfig.xml` when you started the Administration Server, if you have enabled file replication, the Administration Server copies `MyConfig.xml` and names the copy `msi-config.xml`. Depending on your backup schemes and the frequency with which you update your domain's configuration, this option might not be worth the performance cost of copying potentially large files across a network. MBean Attribute: `ServerMBean.MSIFileReplicationEnabled` 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.
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.
DGC Idle Periods Until Timeout	The number of idle periods allowed before object is collected. MBean Attribute: `ServerMBean.DGCIdlePeriodsUntilTimeout` Changes take effect after you redeploy the module or restart the server.