我最初发布这个在https://stackoverflow.com/questions/9665189/php-on-command-line-displays-out-of-memory，但被build议在此发布。
当脚本中的内存不足时，这不是正常的致命错误，因为它不会提供文件名，行号或使用的内存量。 它只是说，当我尝试在命令行上运行php时，无论是传递一个脚本还是只运行一个php，都会出现“内存不足”。 即使试图运行一个不存在的脚本也会提供相同的信息。
换句话说，我得到这个：
dan@server [~]# php Out of memory dan@server [~]# php test.php Out of memory dan@server [~]# php doesntexist.php Out of memory dan@server [~]# php -v Out of memory 但是，通过Apache的PHP工作绝对好。 只是在CLI上，我得到这个错误。
有问题的机器正在运行CentOS版本5.7（最终），它是64位和PHP 5.3.10。 这是一个专用的服务器。
我已经尝试运行ulimit -a丹作为build议，这是输出：
core file size (blocks, -c) 200000 data seg size (kbytes, -d) 200000 scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 37888 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) 200000 open files (-n) 100 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 35 virtual memory (kbytes, -v) 200000 file locks (-x) unlimited
在根上释放-m给出这个：
total used free shared buffers cached Mem: 3824 3714 110 0 142 2632 -/+ buffers/cache: 939 2885 Swap: 3490 0 3490
和从上面的内存使用情况：
Mem: 3916648k total, 3797056k used, 119592k free, 145820k buffers Swap: 3574452k total, 168k used, 3574284k free, 2686844k cached
更新：昨天重新启动服务器，并在下午rest。 但是，今天它正在做同样的事情。
运行“strace php test.php”（一个存在的文件），以及它继续了一段时间，但腻子最后一页左右是这样的：
fstat(3, {st_mode=S_IFREG|0644, st_size=100030, ...}) = 0 mmap(NULL, 100030, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2ad3ce0af000 close(3) = 0 open("/lib64/libnss_dns.so.2", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\17\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=23736, ...}) = 0 mmap(NULL, 2113792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = -1 ENOMEM (Cannot allocate memory) close(3) = 0 munmap(0x2ad3ce0af000, 100030) = 0 alarm(0) = 0 futex(0x3d80e07b20, FUTEX_WAKE_PRIVATE, 2147483647) = 0 futex(0x3d80e079a0, FUTEX_WAKE_PRIVATE, 2147483647) = 0 futex(0x3d7fe94760, FUTEX_WAKE_PRIVATE, 2147483647) = 0 futex(0x3d7fe94c10, FUTEX_WAKE_PRIVATE, 2147483647) = 0 stat("/etc/krb5.conf", {st_mode=S_IFREG|0644, st_size=608, ...}) = 0 open("/proc/filesystems", O_RDONLY) = 3 read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tb"..., 4095) = 314 close(3) = 0 open("/etc/krb5.conf", O_RDONLY) = 3 open("/proc/filesystems", O_RDONLY) = 4 read(4, "nodev\tsysfs\nnodev\trootfs\nnodev\tb"..., 4095) = 314 close(4) = 0 access("/etc/krb5.conf", W_OK) = -1 EACCES (Permission denied) fstat(3, {st_mode=S_IFREG|0644, st_size=608, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ad3ce0af000 read(3, "[logging]\n default = FILE:/var/l"..., 4096) = 608 read(3, "", 4096) = 0 close(3) = 0 munmap(0x2ad3ce0af000, 4096) = 0 open("/dev/urandom", O_RDONLY) = 3 fstat(3, {st_mode=S_IFCHR|0444, st_rdev=makedev(1, 9), ...}) = 0 read(3, "\300\260\36co\363cI\t\355\324\3518gy\354\357\314Z:", 20) = 20 close(3) = 0 futex(0x3d7f624640, FUTEX_WAKE_PRIVATE, 2147483647) = 0 open("/proc/filesystems", O_RDONLY) = 3 read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tb"..., 4095) = 314 close(3) = 0 open("/etc/krb5.keytab", O_RDONLY) = -1 ENOENT (No such file or directory) open("/proc/filesystems", O_RDONLY) = 3 read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tb"..., 4095) = 314 close(3) = 0 futex(0x3d8122d0c0, FUTEX_WAKE_PRIVATE, 2147483647) = 0 stat("/dev/urandom", {st_mode=S_IFCHR|0444, st_rdev=makedev(1, 9), ...}) = 0 brk(0x340b000) = 0x340b000 brk(0x342c000) = 0x340b000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory) mmap(NULL, 134217728, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = -1 ENOMEM (Cannot allocate memory) mmap(NULL, 67108864, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = -1 ENOMEM (Cannot allocate memory) mmap(NULL, 134217728, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = -1 ENOMEM (Cannot allocate memory) mmap(NULL, 67108864, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = -1 ENOMEM (Cannot allocate memory) write(2, "Out of memory\n", 14Out of memory ) = 14 exit_group(1) = ?
编辑：根据sonassi的要求添加输出。
整个日志可从http://www.2shared.com/file/05MVRFI6/dmp.html获得
来自cat / proc / meminfo的输出：
MemTotal: 3916648 kB MemFree: 501180 kB Buffers: 335276 kB Cached: 2312536 kB SwapCached: 0 kB Active: 1312888 kB Inactive: 1702096 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 3916648 kB LowFree: 501180 kB SwapTotal: 3574452 kB SwapFree: 3574292 kB Dirty: 728 kB Writeback: 0 kB AnonPages: 367160 kB Mapped: 33640 kB Slab: 351564 kB PageTables: 18588 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 5532776 kB Committed_AS: 1188280 kB VmallocTotal: 34359738367 kB VmallocUsed: 265828 kB VmallocChunk: 34359471827 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 2048 kB
运行php test.php后，cat / proc / meminfo的输出如下。 因为这是一个公共IP地址，所以我已经replace了服务器的IP地址 – xxx.xxx.xxx.11是服务器的主IP地址，xxx.xxx.xxx.12是另一个IP地址。
Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=3 ID=271 PROTO=UDP SPT=10170 DPT=33437 LEN=12 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=89.39.188.210 DST=xxx.xxx.xxx.11 LEN=48 TOS=0x00 PREC=0x00 TTL=117 ID=47199 DF PROTO=TCP SPT=2119 DPT=4899 WINDOW=65535 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=89.39.188.210 DST=xxx.xxx.xxx.11 LEN=48 TOS=0x00 PREC=0x00 TTL=117 ID=47678 DF PROTO=TCP SPT=2119 DPT=4899 WINDOW=65535 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=89.39.188.210 DST=xxx.xxx.xxx.11 LEN=48 TOS=0x00 PREC=0x00 TTL=117 ID=48675 DF PROTO=TCP SPT=2119 DPT=4899 WINDOW=65535 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=198.60.169.59 DST=xxx.xxx.xxx.11 LEN=48 TOS=0x00 PREC=0x00 TTL=116 ID=16299 DF PROTO=TCP SPT=3185 DPT=5555 WINDOW=16384 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=198.60.169.59 DST=xxx.xxx.xxx.12 LEN=48 TOS=0x00 PREC=0x00 TTL=116 ID=16300 DF PROTO=TCP SPT=3186 DPT=5555 WINDOW=16384 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=198.60.169.59 DST=xxx.xxx.xxx.12 LEN=48 TOS=0x00 PREC=0x00 TTL=116 ID=17038 DF PROTO=TCP SPT=3186 DPT=5555 WINDOW=16384 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=198.60.169.59 DST=xxx.xxx.xxx.11 LEN=48 TOS=0x00 PREC=0x00 TTL=116 ID=17073 DF PROTO=TCP SPT=3185 DPT=5555 WINDOW=16384 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=188.254.224.225 DST=xxx.xxx.xxx.12 LEN=48 TOS=0x00 PREC=0x00 TTL=113 ID=39888 PROTO=TCP SPT=59828 DPT=5900 WINDOW=65535 RES=0x00 SYN URGP=0 Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=188.254.224.225 DST=xxx.xxx.xxx.11 LEN=48 TOS=0x00 PREC=0x00 TTL=113 ID=43041 PROTO=TCP SPT=59828 DPT=5900 WINDOW=65535 RES=0x00 SYN URGP=0 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=269 PROTO=UDP SPT=10202 DPT=33437 LEN=12 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=269 PROTO=UDP SPT=10202 DPT=33437 LEN=12 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=2 ID=270 PROTO=UDP SPT=10202 DPT=33437 LEN=12 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=2 ID=270 PROTO=UDP SPT=10202 DPT=33437 LEN=12 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=3 ID=271 PROTO=UDP SPT=10202 DPT=33437 LEN=12 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=93.191.199.110 DST=xxx.xxx.xxx.11 LEN=32 TOS=0x00 PREC=0x00 TTL=3 ID=271 PROTO=UDP SPT=10202 DPT=33437 LEN=12 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=65.111.170.208 DST=xxx.xxx.xxx.11 LEN=444 TOS=0x00 PREC=0x00 TTL=52 ID=0 DF PROTO=UDP SPT=5105 DPT=5060 LEN=424 Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=65.111.170.208 DST=xxx.xxx.xxx.12 LEN=443 TOS=0x00 PREC=0x00 TTL=52 ID=0 DF PROTO=UDP SPT=5105 DPT=5060 LEN=423 TCP: Treason uncloaked! Peer 82.129.64.220:5306/59348 shrinks window 3410313698:3410313754. Repaired. Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:23:ae:8f:59:78:30:37:a6:da:d2:e9:08:00 SRC=223.203.192.53 DST=xxx.xxx.xxx.12 LEN=1500 TOS=0x00 PREC=0x00 TTL=47 ID=2742 PROTO=UDP SPT=0 DPT=0 LEN=44665
猫/etc/security/limits.conf显示，所有注释，据我所知：
# /etc/security/limits.conf # #Each line describes a limit for a user in the form: # #<domain> <type> <item> <value> # #Where: #<domain> can be: # - an user name # - a group name, with @group syntax # - the wildcard *, for default entry # - the wildcard %, can be also used with %group syntax, # for maxlogin limit # #<type> can have the two values: # - "soft" for enforcing the soft limits # - "hard" for enforcing hard limits # #<item> can be one of the following: # - core - limits the core file size (KB) # - data - max data size (KB) # - fsize - maximum filesize (KB) # - memlock - max locked-in-memory address space (KB) # - nofile - max number of open files # - rss - max resident set size (KB) # - stack - max stack size (KB) # - cpu - max CPU time (MIN) # - nproc - max number of processes # - as - address space limit # - maxlogins - max number of logins for this user # - maxsyslogins - max number of logins on the system # - priority - the priority to run user process with # - locks - max number of file locks the user can hold # - sigpending - max number of pending signals # - msgqueue - max memory used by POSIX message queues (bytes) # - nice - max nice priority allowed to raise to # - rtprio - max realtime priority # #<domain> <type> <item> <value> # #* soft core 0 #* hard rss 10000 #@student hard nproc 20 #@faculty soft nproc 20 #@faculty hard nproc 50 #ftp hard nproc 0 #@student - maxlogins 4 # End of file
cat /etc/sysctl.conf的输出：
# Kernel sysctl configuration file for Red Hat Linux # # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and # sysctl.conf(5) for more details. # Controls IP packet forwarding net.ipv4.ip_forward = 0 # Controls source route verification net.ipv4.conf.default.rp_filter = 1 # Do not accept source routing net.ipv4.conf.default.accept_source_route = 0 # Controls the System Request debugging functionality of the kernel kernel.sysrq = 0 # Controls whether core dumps will append the PID to the core filename # Useful for debugging multi-threaded applications kernel.core_uses_pid = 1 # Controls the use of TCP syncookies net.ipv4.tcp_syncookies = 1 # Controls the maximum size of a message, in bytes kernel.msgmnb = 65536 # Controls the default maxmimum size of a mesage queue kernel.msgmax = 65536 # Controls the maximum shared segment size, in bytes kernel.shmmax = 68719476736 # Controls the maximum number of shared memory segments, in pages kernel.shmall = 4294967296
编辑：更新上面ulimit运行丹，而不是根。
在重新阅读上面的注释和原始文章之后 – 你以root身份运行ulimit -a ，但是你说root不受影响。
您的问题在这里是 ulimit ，但在用户一级。 以dan用户身份login并运行ulimit -a ，您可能会发现内存有限。