Mmap Error Solaris 10
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space Cause This message indicates that the system is
Fork Not Enough Space Solaris 10
running many large applications simultaneously and has run check swap space solaris out of swap space (virtual memory). It could also indicate that applications failed error 12 not enough space solaris without freeing pages from the swap area. Swap space is an area of disk set aside to store portions of applications
Fork Failed Not Enough Space Datastage
and data not immediately required in memory. Any data written during this condition is probably lost. Action Reinstall or reconfigure the system to have more swap space. A general rule is that swap space should be two to three times as large
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as physical memory. Alternatively, use mkfile(1M) and swap(1M) to add more swap area. This example shows how to add 16 Mbytes of virtual memory in the /usr/swap file (any file system with enough free space would work): # mkfile 16m /usr/swap # swap -a /usr/swap To make this reconfiguration automatic at boot time, add the following line to the /etc/vfstab file: /usr/swap - - swap - no - Technical Notes When calling the fork(2), exec(2), sbrk(2), or malloc(3C) routine, a program asked for more memory than the system could supply. This is not a temporary condition; swap space is a system parameter. The symbolic name for this error is ENOMEM, errno=12. Previous: Not a stream deviceNext: not found © 2010, Oracle Corporation and/or its affiliates
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Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Will mmap use continuous memory? (on solaris) up vote 2 down vote favorite I used mmap(just try to understand how mmap works) to allocate 96k anonymous memory, but looks like it split the 96k into https://docs.oracle.com/cd/E19455-01/806-1075/msgs-1831/index.html 64k and 32k. But when allocate 960k, it allocate only one chunk whose size is 960k. When solaris will split the allocate mem into several part? Code: #define PROT PROT_READ | PROT_WRITE #define MAP MAP_ANON | MAP_PRIVATE if ((src = mmap(0, 88304, PROT, MAP, -1, 0)) == MAP_FAILED) printf("mmap error for input"); if ((src = mmap(0, 983040, PROT, MAP, -1, 0)) == MAP_FAILED) printf("mmap error for input"); if ((src = mmap(0, 98304, PROT, MAP, -1, 0)) == MAP_FAILED) printf("mmap error for http://stackoverflow.com/questions/837863/will-mmap-use-continuous-memory-on-solaris input"); Truss: mmap(0x00000000, 88304, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xFFFFFFFF7E900000 mmap(0x00000000, 983040, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xFFFFFFFF7E800000 mmap(0x00000000, 98304, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xFFFFFFFF7E700000 Pmap: FFFFFFFF7E700000 64 - - - rw--- [anon] ==> strange is that for 96k, it was broken into 2 part. FFFFFFFF7E710000 32 - - - rw--- [anon] FFFFFFFF7E800000 960 - - - rw--- [anon] FFFFFFFF7E900000 64 - - - rw--- [anon] FFFFFFFF7E910000 24 - - - rw--- [anon] FFFFFFFF7EA00000 64 - - - rw--- [anon] FFFFFFFF7EA10000 32 - - - rw--- [anon] solaris mmap share|improve this question edited May 8 '09 at 2:00 paxdiablo 491k1189731422 asked May 8 '09 at 1:35 Daniel 3063517 add a comment| 3 Answers 3 active oldest votes up vote 3 down vote accepted That is contiguous memory, you can tell by the addresses (F...700000 + 64K = F...710000) so I don't think you have to worry about that. I'm pretty certain that mmap is required to give you contiguous memory in your address space. It would be pretty useless otherwise since it only gives you one base address. With two non-contiguous blocks, there would be no way to find that second block. So I guess your question is: why does this show up as two blocks in the pmap? To which my answer would be, "Stuffed if I know". But I can make an intelligent guess which is the best anyone can hope for from me at this time of
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the http://serverfault.com/questions/156063/what-resource-limit-is-java-encountering-on-my-solaris-server company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top What resource limit is Java encountering not enough on my Solaris server? up vote 0 down vote favorite I have a (sparc) Solaris 10 server with 16G of RAM. There are over 4G free. Memory: 16G phys mem, 4371M free mem, 8193M swap, 8193M free swap I am running a lot of java processes (I'm using the 32-bit JVM because none of them need a lot of memory) and want to run another one. But it claims to be out of memory. not enough space # /usr/jdk/jdk1.6.0_17/bin/java -version Error occurred during initialization of VM Could not reserve enough space for object heap I tried running with a reduced memory pool max size (-Xmx). Then I gradually increased the ceiling until it was very high indeed. How much should it be allocating without the -Xmx flag? According to this page, I wouldn't expect it to try to use more than 1G. And yet I can go to more than three times that without error. # /usr/jdk/jdk1.6.0_17/bin/java -Xmx3900m -version java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) Server VM (build 14.3-b01, mixed mode) If I raise it above that level, then I start to get other errors, but I would expect that since I am approaching the 4G limit of address space for a 32-bit process anyway. What could possibly be happening here, and how can I diagnose it myself? Edit: most of the java processes are running as different users (no more than 10 per user). But note in the above that I am trying to launch the new process (merely 'java -version') as root. # ulimit -a core file size (blocks, -c) unlimited data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited open files (-n) 256 pipe size (512 bytes, -p) 10 stack size (kbytes, -s) 8192 cpu time