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java [2012/12/06 17:27] 194.249.198.48 [Good/best practices] |
java [2012/12/06 17:29] 194.249.198.48 |
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| - | ==== Good/best practices ==== | + | ==== Choosing the garbage collector ==== |
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| + | ===== Good/best practices | ||
| 1. OpenJDK 1.6 and 1.7 may (as of now, 6. 12. 2012) still be unstable in stressful production environments leading up to segmentation faults and unintended behaviour. Use Sun/Oracle JVM for maximum stability and performance. | 1. OpenJDK 1.6 and 1.7 may (as of now, 6. 12. 2012) still be unstable in stressful production environments leading up to segmentation faults and unintended behaviour. Use Sun/Oracle JVM for maximum stability and performance. | ||
| - | ==== Examples ==== | + | ===== Examples |
| tying to limit jvm to ~2G of RAM (java x86_64) | tying to limit jvm to ~2G of RAM (java x86_64) | ||
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| java (i386) | java (i386) | ||
| java -Xms1400m -Xmx2G -XX: | java -Xms1400m -Xmx2G -XX: | ||
| - | ==== Troubleshooting ==== | + | |
| + | ===== Troubleshooting | ||
| === Resolving java.lang.OutOfMemoryError: | === Resolving java.lang.OutOfMemoryError: | ||
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| (Note that Xmx is separate from the PermGen space, so increasing Xmx will not help with the PermGen errors). \\ | (Note that Xmx is separate from the PermGen space, so increasing Xmx will not help with the PermGen errors). \\ | ||
| **The PermGen memory in addition to the Xmx memory. | **The PermGen memory in addition to the Xmx memory. | ||
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