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04-30-2008
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unable to allocate enough memory
On SunOS 5.8 I get an error when starting a large Java process with over 2Gb memory. Code:
Error occurred during initialization of VM Could not reserve enough space for object heap When stopping several other Java processes we can start this process. This seems to indicate that we don't have enough consecutive memory blocks available. top reports the following: Code:
load averages: 0.81, 0.91, 1.26 17:03:16 284 processes: 283 sleeping, 1 on cpu CPU states: 90.4% idle, 6.0% user, 2.4% kernel, 1.1% iowait, 0.0% swap Memory: 32G real, 11G free, 28G swap in use, 2491M swap free Thus even though we have 11Gb out of 32Gb free on our 6CPU system we can't allocate enough memory. uptime reports: Code:
5:13pm up 237 day(s), 9 min(s), 19 users, load average: 0.93, 1.16, 1.27 Is it possible that the memory is too fragmented? How can we tell? or how can we fix this? |
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04-30-2008
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I think increasing the available memmory to JVM would be enough. Add these parameters to the command line: Code:
java -Xms256M -Xmx512M .... This way, a min. of 256Mb to a max. of 512Mb will be available. Change the values acording to your needs and tell us if it worked  Regards. |
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05-02-2008
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We have 2Gb heap allocated. The issue is not a java issue because this is an OS message produced on the native stdout, not SystemOut from java. The Solaris system is unable to allocate enough memory for the JVM, even though it reports to have 12Gb available. If we stop other large memory consuming processes it is possible to start this JVM process. How is it possible that Solaris can't allocate 2Gb to 3Gb memory when there's 6 times that much available?
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05-02-2008
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Quote:
That's a little bit weird... I'm talking about the fact that when you stop other java processes it works... - Is your JVM 32 bits? - what about "ulimits"? |
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05-02-2008
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Sounds like a 32 bit constraint on process space.
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05-05-2008
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ulimit -a reports: Code:
core file size (blocks) unlimited data seg size (kbytes) unlimited file size (blocks) unlimited open files 1024 pipe size (512 bytes) 10 stack size (kbytes) 8192 cpu time (seconds) unlimited max user processes 29995 virtual memory (kbytes) unlimited It is a 32-bit JVM: Code:
java version "1.4.2_15" Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_15-b02) Java HotSpot(TM) Client VM (build 1.4.2_15-b02, mixed mode) uname -a: Code:
SunOS hostname 5.8 Generic_117350-43 sun4us sparc FJSV,GPUZC-M |
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