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  • 在linux系统中安装solr后,启动...*** [WARN] *** Your open file limit is currently 1024. It should be set to 65000 to avoid operational disruption. If you no longer wish to see this warning, set SOLR_U...

    在linux系统中安装solr后,启动时提示两个警告,

    *** [WARN] *** Your open file limit is currently 1024.  
     It should be set to 65000 to avoid operational disruption.
     If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh
    *** [WARN] ***  Your Max Processes Limit is currently 4096.
     It should be set to 65000 to avoid operational disruption.
     If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh


    如何取消呢

    1。查看系统所有限制

    [zhw@ecs-solr bin]$ ulimit -a
    core file size          (blocks, -c) 0
    data seg size           (kbytes, -d) unlimited
    scheduling priority             (-e) 0
    file size               (blocks, -f) unlimited
    pending signals                 (-i) 127866
    max locked memory       (kbytes, -l) 64
    max memory size         (kbytes, -m) unlimited
    open files                      (-n) 1024
    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) 4096
    virtual memory          (kbytes, -v) unlimited
    file locks                      (-x) unlimited

    2。修改打开文件数限制

    。 以root身份修改文件/etc/security/limits.conf文件,在最后添加下面两行

    * soft nofile 65535
    * hard nofile 65535

    这个修改之后,重新登录生效。

    3。修改进程限制

    以root身份修改文件/etc/security/limits.d/20-nproc.conf 文件(centOS6为90-nproc.conf),文件内容为

    *          soft    nproc     4096

    root       soft    nproc     unlimited

    将4096改成65535

    修改后重新登录生效。

     

     

     

     

     

     

     

    展开全文
  • 背景最近在工作中发现了一个错误,在执行多线程扫描脚本的时候频繁出现下面这个错误HTTPConnectionPool(host=‘t.tips', port=80): Max retries exceeded with url: /index.php (Caused by NewConnectionError(': ...

    背景

    最近在工作中发现了一个错误,在执行多线程扫描脚本的时候频繁出现下面这个错误

    HTTPConnectionPool(host=‘t.tips', port=80): Max retries exceeded with url: /index.php (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 24] Too many open files',))

    比较诡异...

    分析

    博主自己手上的一些小项目经常需要进行多线程的批量扫描来采集数据,像采集数据这种功能当然是线程越多越好了,所以通常情况下我都是使用 3000 个线程进行扫描,在确定带宽充足,系统硬件配置够高的情况下依然会出现上述问题,这就让我想到是不是因为系统的限制问题。

    通过搜索引擎我找到了关于系统限制的介绍,执行

    $ ulimit -n

    1024

    得到的结果是1024,系统限制为同时打开1024个文件,这显然是太少了。

    解决

    这个问题的解决方法很简单,直接修改下面的文件

    sudo vim /etc/security/limits.conf

    最这个文件的最后添加两行代码

    * soft nofile 10240

    * hard nofile 10240

    当然这个数字根据自己的需要进行修改即可,保存后注销重新登录就好了。

    总结

    以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流。

    展开全文
  • 在平时运维会遇到类似"Too many open files"(打开太多文件)的...内核参数是file-max和nr_open,ulimit值是nofile(CentOS6)或者LimitNOFILE(CentOS7)。内核设置方式和数值类似;但是针对ulimit,CentOS7和CentOS6设置...
        在平时运维会遇到类似"Too many open files"(打开太多文件)的提示,是可以通过设置参数来解决资源限制。

    9a374db58fc177a0a4a8cd91e307c4fd.png

    设置参数有两个方面:内核参数和ulimit值;内核参数是file-max和nr_open,ulimit值是nofile(CentOS6)或者LimitNOFILE(CentOS7)。内核设置方式和数值类似;但是针对ulimit,CentOS7和CentOS6设置方式有些不同,主要在于ulimit的作用范围不同;CentOS7的limits.conf的配置,只适用于通过PAM认证登录用户的资源限制,对systemd的service的资源限制不生效,而CentOS6是对二者都生效。下文会有内核参数和ulimit值对服务影响的测试(以CentOS7为例),看完会对今后的工作有一定的帮助。
    在CentOS7上/etc/security/limits.conf配置文件中会有以下说明:#This file sets the resource limits for the users logged in via PAM.#It does not affect resource limits of the system services.

    d98a23c195f547e3756b923132140000.png

    设置方式

    内核参数(仅供参考):file-max(仅供参考,300G内存服务器系统计算的出数字)# echo 39095546 > /proc/sys/fs/file-maxnr_open(仅供参考,默认的基础上乘以10)# echo 10485760 > /proc/sys/fs/nr_open# vim /etc/sysctl.d/my-set.conf  ##如果让该配置生效可以sysctl -p /etc/sysctl.d/my-set.conf fs.file-max = 39095546fs.nr_open = 10485760ulimit设置(仅供参考):# vim  /etc/systemd/system.conf  ##在配置文件最后添加DefaultLimitNOFILE=65535# systemctl daemon-reexec  ##重新加载systemd配置# vim /etc/security/limits.d/my-set.conf  ##新建的自定义配置* soft nofile 65535* hard nofile 65535# ulimit -n 65535

    5ddffaf7de5e41196610c2d3e38d3b65.png

    生效问题

    ##当前终端临时生效,可以who am i查看当前所在的终端,重启服务器也失效# ulimit -n 65535   ##当前终端不生效,对新开终端生效,重启服务器也生效# vim /etc/security/limits.d/my-set.conf * soft nofile 65535* hard nofile 65535##  所有终端都生效,应用服务需要重启后才生效,重启服务器也生效# vim  /etc/systemd/system.conf  ##在配置文件最后添加DefaultLimitNOFILE=65535# systemctl daemon-reexec ## file-max和nr_open内核参数设置类似,所有终端服务都生效,但是重启服务器失效# echo 39095546 > /proc/sys/fs/file-max## 所有终端服务都生效,重启服务器也生效# vim /etc/sysctl.d/my-set.conf  fs.file-max = 39095546fs.nr_open = 10485760# sysctl -p /etc/sysctl.d/my-set.conf

    =============================================

    目录

        0.环境信息

        1. 修改ulimit的nofile值,确定是否对nginx文件句柄的限制

            1.1 不修改服务端ulimit值,ab压测

            1.2 修改服务端ulimit值,ab压测

        2. 修改systemd的LimitNOFILE值,确定是否对nginx文件句柄的限制

            2.1 不修改服务端LimitNOFILE值,ab压测

            2.2 修改服务端LimitNOFILE值,ab压测

        3. file-max值,确定是否对nginx文件句柄的限制

        4. nr_open值,确定是否对nginx文件句柄的限制


    ============================================

    0.环境信息

    ----------------------------------------------

    操作系统和应用工具版本

    # cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) # nginx -Vnginx version: nginx/1.16.1# ab -VThis is ApacheBench, Version 2.3 1430300 $>

    ----------------------------------------------

    参数默认值

    ----------------------------------------------

    6d222019cbe4b70a3ad35435b92414f8.png

    参数  描述默认值
    ulimit  -Sn 可以打开最大文件描述符的数量,软限制1024
    ulimit  -Hn 可以打开最大文件描述符的数量,硬限制4096
    fs.nr_open单个进程可以分配最大的文件句柄1024*1024=1048576
    fs.file-max允许整个系统打开的文件句柄的总数基于系统动态计算(通常相当大)

    操作系统内参看

    # cat /proc/sys/fs/file-max95548    注:file-max 非固定值,根据系统的资源动态计算,内核官网未找到相关公式或者算法,大概值为grep MemTotal /proc/meminfo | awk '{printf("%d",$2/10)}',但是值和实际系统计算得出,测试机是1G内存# cat /proc/sys/fs/nr_open  ##1024*1024=10485761048576# systemctl show |grep -i nofileDefaultLimitNOFILE=4096# ulimit -n1024# ulimit -Hn4096# prlimit --pid `cat /var/run/nginx.pid` -nRESOURCE DESCRIPTION              SOFT HARD UNITSNOFILE   max number of open files 1024 4096

    参数说明

    file-max是内核级别强制执行的最大文件描述符(FD),所有进程都不能超过它;

    nr_open和ulimit是在进程级别强制执行的,可以小于file-max;

    file-max的数值也可以小于nr_open,但是这样设置没有意义;

    但是nr_open>=nofile(ulimit),必须大于等于。

    nofile(ulimit)设置值大于nr_open值的时候会报错,而LimitNOFILE设置值大于nr_open值不会报错,但是重启服务会报错或者将服务ulimit设置为65536;nofile(ulimit)和LimitNOFILE都必须小于等于nr_open值

    # cat /proc/sys/fs/nr_open 1048576# ulimit -n 1048577-bash: ulimit: open files: cannot modify limit: Operation not permitted  # vim /etc/systemd/system.confDefaultLimitNOFILE=1048577# systemctl daemon-reexec # systemctl show |grep -i nofileDefaultLimitNOFILE=1048577# systemctl restart nginx# prlimit --pid `cat /var/run/nginx.pid` -nRESOURCE DESCRIPTION               SOFT  HARD UNITSNOFILE   max number of open files 65536 65536
    file-max & file-nr------------------The value in file-max denotes the maximum number of file-handles that the Linux kernel will allocate. When you get lotsof error messages about running out of file handles, you mightwant to increase this limit.Historically,the kernel was able to allocate file handlesdynamically, but not to free them again. The three values infile-nr denote the number of allocated file handles, the numberof allocated but unused file handles, and the maximum number offile handles. Linux 2.6 always reports 0 as the number of freefile handles -- this is not an error, it just means that thenumber of allocated file handles exactly matches the number ofused file handles.Attempts to allocate more file descriptors than file-max arereported with printk, look for "VFS: file-max limit reached".nr_open-------This denotes the maximum number of file-handles a process canallocate. Default value is 1024*1024 (1048576) which should beenough for most machines. Actual limit depends on RLIMIT_NOFILEresource limit.# man ulimitulimit [-HSTabcdefilmnpqrstuvx [limit]]Provides control over the resources available to the shell and to processes started by it, on systems that allow such control.The -H and -S options specify that the hard or soft limit is set for the given resource. A hard limit cannot be increased by a non-root user once it is set; a soft limit may be increased up to the value of the hard limit.  If neither -H nor -S is specified, both the soft and hard limits are set.  The value of limit can be a number in the unit specified for the resource or one of the special values hard, soft, or unlimited, which stand for the current hard limit, the current soft limit, and no limit, respectively.  If limit is omitted, the current value of the soft limit of the resource is printed, unless the  -H  option  is given. When more than one resource is specified, the limit name and unit are printed before the value.

    内核参数详解:https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/Documentation/admin-guide/sysctl/fs.rst?h=v5.6.13


    =============================================

    测试过程说明

    以nginx服务为例测试,服务端为:192.168.88.111,客户端为:192.168.88.107

    5f97edf58da17fa9c71a8924017eb543.png

    服务端为:192.168.88.111

    # yum install nginx -y# vim /etc/nginx/nginx.conf  ##只修改此处,其他配置不需要修改events {#    worker_connections 1024;    worker_connections 65535;}# systemctl start nginx# systemctl enable nginx

    客户端为:192.168.88.107

    # yum install httpd-tools -y# ab -n 2000 -c 2000 http://192.168.88.111/index.html客户端也是需要修改ulimit值,如果不修改socket: Too many open files (24)# ulimit -n 8192  ##在客户端操作

    ----------------------------------------------

    1. 修改ulimit的nofile值,确定是否对nginx文件句柄的限制

    ----------------------------------------------

    服务端192.168.88.111需要做几个操作

    # ulimit -n   1024# ulimit -Hn4096# tailf /var/log/nginx/error.log# prlimit --pid `cat /var/run/nginx.pid` -nRESOURCE DESCRIPTION              SOFT HARD UNITSNOFILE   max number of open files 1024 4096

    -------------------

    1.1 不修改服务端ulimit值,ab压测

    客户端192.168.88.107# ab -n 1000 -c 1000 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log没有日志输出

    2b2f2fa0d60ab8ace0bb5391f26baa77.png

    客户端192.168.88.107# ab -n 1500 -c 1500 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log2020/07/25 20:10:21 [crit] 874#0: accept4() failed (24: Too many open files)2020/07/25 20:10:21 [crit] 874#0: *6725 open() "/usr/share/nginx/html/index.html" failed (24: Too many open files), client: 192.168.88.107, server: _, request: "GET /index.html HTTP/1.0", host: "192.168.88.111"2020/07/25 20:10:21 [crit] 874#0: *6725 open() "/usr/share/nginx/html/50x.html" failed (24: Too many open files), client: 192.168.88.107, server: _, request: "GET /index.html HTTP/1.0", host: "192.168.88.111"

    -------------------

    1.2 修改服务端ulimit值,ab压测

    # ulimit -n 2048   ##只对当前终端生效# cat /etc/security/limits.d/nginx.conf  ##对当前终端不生效,对新终端生效* soft nofile  2048* hard nofile  4096# reboot   ## 这里重启,为了让配置文件ulimit生效,来判断ulimit是否对nginx的文件句柄有限制# ulimit -n2048# prlimit --pid `cat /var/run/nginx.pid` -nRESOURCE DESCRIPTION              SOFT HARD UNITSNOFILE   max number of open files 1024 4096 从prlimit输出结果来看,ulimit的改变,nginx的文件句柄值未改变。

    做ab压测

    客户端192.168.88.107# ab -n 1500 -c 1500 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log2020/07/25 20:10:21 [crit] 874#0: accept4() failed (24: Too many open files)

    总结:从prlimit输出结果来看,ulimit的改变,nginx的文件句柄值未改变;以及ab压测,1500压测值没有超过ulimit的2048设置,从服务端nginx的error.log来看,会报错Too many open files,所以ulimit值没有影响nginx服务的文件句柄数。

    ----------------------------------------------

    2. 修改systemd的LimitNOFILE值,确定是否对nginx文件句柄的限制

    ----------------------------------------------

    -------------------

    2.1 不修改服务端LimitNOFILE值,ab压测

    测试结果和1.1类似

    -------------------

    2.2 修改服务端LimitNOFILE值,ab压测

    修改LimitNOFILE

    # ulimit -n1024# ulimit -Hn4096# prlimit --pid `cat /var/run/nginx.pid` -nRESOURCE DESCRIPTION              SOFT HARD UNITSNOFILE   max number of open files 1024 4096 # systemctl show |grep -i nofileDefaultLimitNOFILE=4096# vim /etc/systemd/system.conf   ##文件最后添加设置DefaultLimitNOFILE=8192DefaultLimitNOFILE=8192

    刷新systemd管理配置,并查看文件句柄相关限制

    # systemctl daemon-reexec # systemctl show |grep -i nofileDefaultLimitNOFILE=8192# ulimit -n1024# ulimit -Hn4096# systemctl restart nginx# prlimit --pid `cat /var/run/nginx.pid` -nRESOURCE DESCRIPTION              SOFT HARD UNITSNOFILE   max number of open files 8192 8192
    客户端192.168.88.107# ab -n 1500 -c 1500 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log没有日志输出

    ----------------------------------------------

    3. file-max值,确定是否对nginx文件句柄的限制

    ----------------------------------------------

    服务端192.168.88.111

    前提条件是修改LimitNOFILE值为8192

    # vim /etc/systemd/system.conf   ##文件最后添加设置DefaultLimitNOFILE=8192DefaultLimitNOFILE=8192# systemctl daemon-reexec # systemctl show |grep -i nofileDefaultLimitNOFILE=8192

    在修改file-max

    # cat /proc/sys/fs/file-nr 1088  0  95548其中第一个数表示当前系统已分配使用的打开文件描述符数,第二个数为分配后已释放的(目前已不再使用),第三个数等于file-max。# echo 2500 > /proc/sys/fs/file-max# cat /proc/sys/fs/file-nr1120  0  2500
    客户端192.168.88.107# ab -n 1500 -c 1500 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log2020/07/25 22:36:27 [crit] 2327#0: accept4() failed (23: Too many open files in system)2020/07/25 22:36:27 [crit] 2327#0: *26592 open() "/usr/share/nginx/html/index.html" failed (23: Too many open files in system), client: 192.168.88.107, server: _, request: "GET /index.html HTTP/1.0", host: "192.168.88.111"

    报错信息为Too many open files in system,系统打开太多文件,从/proc/sys/fs/file-nr可知,1120(系统其它进程占用文件句柄数)+1500(ab压测值)>2500(系统内核最大文件句柄限制),所以会报错。

    ----------------------------------------------

    4. nr_open值,确定是否对nginx文件句柄的限制

    ----------------------------------------------

    服务端192.168.88.111

    前提条件是修改LimitNOFILE值为8192和file-max为默认值95548(测试机内存为1G)

    # systemctl show |grep -i nofileDefaultLimitNOFILE=8192# cat /proc/sys/fs/file-max 95548# cat /proc/sys/fs/nr_open 1048576

    修改nr_open

    # echo 8000 > /proc/sys/fs/nr_open# systemctl restart nginxJob for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.# echo 8192 > /proc/sys/fs/nr_open# systemctl restart nginx

    注:nr_open必须要大于等于DefaultLimitNOFILE,否则nginx服务不能启动

    # tailf /var/log/messagesJul 26 12:35:04 centos-test01 systemd: Failed at step LIMITS spawning /usr/bin/rm: Operation not permittedJul 26 12:35:04 centos-test01 systemd: nginx.service: control process exited, code=exited status=205Jul 26 12:35:04 centos-test01 systemd: Failed to start The nginx HTTP and reverse proxy server.Jul 26 12:35:04 centos-test01 systemd: Unit nginx.service entered failed state.
    客户端192.168.88.107# ulimit -n 10000# ab -n 1500 -c 1500 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log没有日志输出
    客户端192.168.88.107# ulimit -n 10000# ab -n 8192 -c 8190 http://192.168.88.111/index.html服务端192.168.88.111# tailf /var/log/nginx/error.log020/07/26 12:56:46 [crit] 3438#0: accept4() failed (24: Too many open files)2020/07/26 12:56:46 [crit] 3438#0: *8144 open() "/usr/share/nginx/html/index.html" failed (24: Too many open files), client: 192.168.88.107, server: _, request: "GET /index.html HTTP/1.0", host: "192.168.88.111"2020/07/26 12:56:46 [crit] 3438#0: *8144 open() "/usr/share/nginx/html/50x.html" failed (24: Too many open files), client: 192.168.88.107, server: _, request: "GET /index.html HTTP/1.0", host: "192.168.88.111"

    只有解除系统对服务限制,才能让服务更好的运行,展示它应有的价值。

    a239a66333923a9b429ebbb66f7c9093.png

    展开全文
  • <p>Error: OP(LoadCombine) fail to open file models/BaiduCN1.2k/baidu_cn1.2k_model_fluid.tar.gz/params.pdparams, please check whether the model file is complete or damaged. at (/paddle/paddle/fluid/...
  • [root@pansa ~]# su - oracle su: /bin/bash: Too many open files in system --这里报错,说打开的文件太多,不能切换到oracle用户了 --解决方法(增加最大打开...[root@pansa ~]# cat /proc/sys/fs/file-max 
    [root@pansa ~]# su - oracle
    su: /bin/bash: Too many open files in system
    --这里报错,说打开的文件太多,不能切换到oracle用户了
    --解决方法(增加最大打开文件数的限制,当然最好是自己能控制好这个数量,要不机器性能也不行)
    [root@pansa ~]# cat /proc/sys/fs/file-max 
    65536
    [root@pansa ~]# vi /etc/sysctl.conf
    修改fs.file-max = 655360
    增大10倍 
    然后查看下:
    [root@pansa ~]# sysctl -p
    kernel.sysrq = 0
    kernel.core_uses_pid = 1
    net.ipv4.tcp_syncookies = 1
    kernel.msgmnb = 65536
    kernel.msgmax = 65536
    kernel.shmmax = 68719476736
    kernel.shmall = 4294967296
    kernel.sem = 1055 32000 100 128
    kernel.shmmax = 2147483648
    kernel.shmall = 2097152
    net.core.optmem_max = 65535
    net.core.rmem_default = 4194304
    net.core.wmem_default = 262144
    net.core.rmem_max = 4194304
    net.core.wmem_max = 262144
    fs.file-max = 655360

    [root@pansa ~]# cat /proc/sys/fs/file-max 
    6553600


    --然后就可以切换了
    展开全文
  • 在平时运维会遇到类似"Too many open files"(打开太多文件)的...内核参数是file-max和nr_open,ulimit值是nofile(CentOS6)或者LimitNOFILE(CentOS7)。内核设置方式和数值类似;但是针对ulimit,CentOS7和CentOS6设置...
  • 出现这句提示的原因是程序打开的文件/socket连接数量超过系统设定值。...当前系统文件句柄的最大数目,只用于查看,不能设置修改cat /proc/sys/fs/file-max 查看某个进程的打开文件限制数cat /proc/10446(pid)/l...
  • 这个提示是说明msql语句在执行过程中,打开的表非常多,已经超出资源限制,可以忽略或者通过ulimit命令设置系统资源限制 ...#修改open files和max user processes 值: ulimit -n 65535 ulimit -u 65535
  • 项目场景:在部署Redis集群服务的时候报错,...You requested maxclients of 10000 requiring at least 10032 max file descriptors. Server can't set maximun open files to 10032 because of OS error:Opena..
  • 报错提示预训练模型地址不存在,使用的最新的master版本进行的训练。 基础训练参数: <p>architecture: FasterRCNN log_iter: 50 log_smooth_window: 50 max_iters: 20000 max_size: 1333 metric: COCO...
  • <p>Please upload the ss-local.log file here the file is in ~/Library/Logs 1) Open 'Advanced Settings -> enable Verbose Mode' 2) Continue run <code>Shadowsocksx-NG-R8</code> for 5 minutes 3)...
  • ## 错误提示: Warning: imagejpeg() [function.imagejpeg]: Unable to open '123.jpg' for writing: Permission denied in 3.php on line 86 ## 错误对应代码: imagejpeg($newim,$name); ## 全部代码...
  • --debug-check Check memory and open file usage at exit. -T, --debug-info Print some debug info at exit. -D, --database=name Database to use. --default-character-set=name Set the default ...
  • image = Image.open(BytesIO(base64.b64decode(data["image"]))) try: image = np.asarray(image) # from PIL image to numpy array image = utils.preprocess(image) # apply the preprocessing image = np....
  • 提示 Not Found <pre><code>sh npm ERR! code E404 npm ERR! 404 Not Found - GET ...
  • with open('C:\\Users\\asus\\Desktop\\lenses.txt', 'r') as fr: #加载文件 lenses = [inst.strip().split('\t') for inst in fr.readlines()] #处理文件 lenses_target = [] #提取每组数据的类别,保存在列表...
  • # the file system to use for the volume neonsan_server_fsType: ext4 client_tcp_no_delay: 1 client_io_depth: 64 client_io_timeout: 30 conn_timeout: 8 open_volume_timeout: 180 # GlusterFS provisioner ...
  • 1.autobench运行时出现...httperf: warning: open file limit > FD_SETSIZE; limiting max. # of open files to FD_SETSIZE 解决:更改文件的配置  文件1 : /etc/security/limits.conf 由于最新的版本 * hard nofil
  • php配置查找short_open_tag = Off,把off改成On,注意是前面没有#号的那一排。memory_limit = 128M ;最大内存使用,运行程序提示内存不足时可修改其大小upload_max_filesize = 2M ;附件大小...
  • 生产中my.cnf配置示例

    2019-09-27 10:54:12
    innodb_file_per_table = 1 打开独立表空间 max_connections = 8000 #MySQL 服务所允许的同时会话数的上限,经常出现Too Many Connections的错误提示,则需要增大此值 open_files_limit = 10240 #所有线程...
  • file://就发回“Fail By Open File”的错误信息 goto END; file://并跳到END处 } } while ((ent = readdir(dir)) != NULL) { file://如果访问目标目录成功 if(*(AnsiString(dirname)).AnsiLastChar()!=\\) file://...
  • 然后一顿搜索,原因是在运行linux系统时,打开的文件太多就会提示too many open files,出现这句提示的原因是程序打开的文件/socket连接数量超过系统设定值。解决方法如下: 参考链接为:...
  • winsock实现ftp服务器

    热门讨论 2008-12-11 19:25:06
    if (FileSize>MAX_FILESIZE) { printf("Your file is too big!\n"); fclose(fp); return(0); } memcpy(&SendData[i],buffer,count); i+=count; } fclose(fp); SendData[i]='\0'; strcpy(Data...
  • UltraEdit-32

    热门讨论 2008-12-11 18:22:00
    - Added "Open in UltraEdit" right click menu command to remote file listing of FTP/SFTP Browser - Filenames with '$' are now handled correctly for VAX/VMS FTP Servers - Fixed support for BS2000 FTP...
  • myisam max sort file size 2,147,483,647 myisam recover options OFF myisam repair threads 1 myisam sort buffer size 67,108,864 myisam stats method nulls_unequal net buffer length 16,384 ...
  • 2019-07-25T03:50:31.499690Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000) 2019-07-25T03:50:31.499875Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000) 2019-07-...
  • 功能:仅仅打印提示。*/ void Destory() { MessageBox(NULL,_T("我保证什么都不做"),_T("Test"),MB_OK); } /*宿主程序引导模块 功能:创建临时文件,将所触发的病毒文件的宿主程序写入,然后启动*...
  • with open(file_path, 'rb') as fp: data = fp.read() file_md5 = hashlib.md5(data).hexdigest() print(file_md5) return file_md5 except Exception as e: print(e.args) return '&#...
  • 非特权用户访问时,会出现以下提示: ERROR: ORA-01035: ORACLE 只允许具有 RESTRICTED SESSION 权限的用户使用 6、startup force 强制启动方式 当不能关闭数据库时,可以用startup force来完成数据库的关闭 先...
  • av_log(ffp, AV_LOG_ERROR, "Could not open output file '%s'", file_name); goto end; } } // 写视频文件头 if (avformat_write_header(ffp->m_ofmt_ctx, NULL) ) { av_log(ffp, AV_LOG_...

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