Voir la source de TIPS - Déterminer les infos JVM

= Introduction =

Cet article référence quelques trucs et astuces pour déterminer des informations relatives à une JVM.

= Tips =

== Déterminer la version de Java ==

 root@machine:~# java -version
 openjdk version "1.8.0_212"
 OpenJDK Runtime Environment (build 1.8.0_212-8u212-b01-1~deb9u1-b01)
 OpenJDK 64-Bit Server VM (build 25.212-b01, mixed mode)

== Déterminer la valeur des flags ==

<pre>
root@machine:~# java -XX:+PrintFlagsFinal
[Global flags]
    uintx AdaptiveSizeDecrementScaleFactor          = 4                                   {product}
    uintx AdaptiveSizeMajorGCDecayTimeScale         = 10                                  {product}
    uintx AdaptiveSizePausePolicy                   = 0                                   {product}
    uintx AdaptiveSizePolicyCollectionCostMargin    = 50                                  {product}
    uintx AdaptiveSizePolicyInitializingSteps       = 20                                  {product}
    uintx AdaptiveSizePolicyOutputInterval          = 0                                   {product}
    uintx AdaptiveSizePolicyWeight                  = 10                                  {product}
    uintx AdaptiveSizeThroughPutPolicy              = 0                                   {product}
    uintx AdaptiveTimeWeight                        = 25                                  {product}
     bool AdjustConcurrency                         = false                               {product}
     bool AggressiveOpts                            = false                               {product}
     intx AliasLevel                                = 3                                   {C2 product}
     bool AlignVector                               = true                                {C2 product}
     intx AllocateInstancePrefetchLines             = 1                                   {product}
     intx AllocatePrefetchDistance                  = 256                                 {product}
     intx AllocatePrefetchInstr                     = 0                                   {product}
     intx AllocatePrefetchLines                     = 3                                   {product}
     intx AllocatePrefetchStepSize                  = 64                                  {product}
     ...
</pre>

[[Category:Java]]
[[Category:Commande]]