{"id":318500,"date":"2021-02-04T21:17:51","date_gmt":"2021-02-04T13:17:51","guid":{"rendered":"http:\/\/4563.org\/?p=318500"},"modified":"2021-02-04T21:17:51","modified_gmt":"2021-02-04T13:17:51","slug":"%e6%88%91%e7%9a%84%e5%86%85%e5%ad%98%e9%83%bd%e5%8e%bb%e5%93%aa%e4%ba%86-%e5%85%b3%e4%ba%8e%e5%86%85%e5%ad%98%e5%8d%a0%e7%94%a8%e7%9a%84%e9%97%ae%e9%a2%98%e8%af%b7%e6%95%99","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=318500","title":{"rendered":"\u6211\u7684\u5185\u5b58\u90fd\u53bb\u54ea\u4e86 [\u5173\u4e8e\u5185\u5b58\u5360\u7528\u7684\u95ee\u9898\u8bf7\u6559]"},"content":{"rendered":"
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\u6211\u7684\u5185\u5b58\u90fd\u53bb\u54ea\u4e86 [\u5173\u4e8e\u5185\u5b58\u5360\u7528\u7684\u95ee\u9898\u8bf7\u6559] <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : jaynos <\/span> <\/i> 5<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u8bf7\u6559\u5404\u4f4d linux\/java \u5927\u4f6c\u4eec\u4e00\u4e2a\u5173\u4e8e\u5185\u5b58\u5360\u7528\u7684\u95ee\u9898\u3002<\/p>\n

\u5148\u8bf4\u4e0b\u573a\u666f\u662f\u4e00\u4e2a springboot + websocket-starter \u7684\u5373\u65f6\u4efb\u52a1\u670d\u52a1\u3002\u5355\u673a 4c8g \u53ea\u8fd0\u884c\u8be5\u670d\u52a1\uff0c\u5927\u6982\u7ef4\u6301 2w+\u957f\u8fde\u63a5\u3002free -h \u663e\u793a\u5185\u5b58\u5360\u7528\u4e3a 6.8G \u3002\u5728 top \u4e2d\u663e\u793a\u8be5\u8fdb\u7a0b RES \u4e3a 5.0G \u3002\u963f\u91cc\u4e91\u540e\u53f0\u62a5\u8b66\u663e\u793a\u5df2\u7ecf\u5360\u7528\u4e86 95%+\u7684\u5185\u5b58\u3002<\/p>\n

\u4ee5\u4e0b\u4e3a free -h \u547d\u4ee4\u8f93\u51fa\u7ed3\u679c<\/p>\n

[[email protected] srv]# free -h               total        used        free      shared  buff\/cache   available Mem:           7.4G        6.8G        223M        536K        321M        297M Swap:            0B          0B          0B <\/code><\/pre>\n
\u4ee5\u4e0b\u4e3a top \u547d\u4ee4\u6309\u5185\u5b58\u6392\u5e8f\u90e8\u5206\u8f93\u51fa\u7ed3\u679c<\/p>\n
top - 22:40:13 up 14 days,  5:36,  2 users,  load average: 0.22, 0.18, 0.21 Tasks:  97 total,   1 running,  96 sleeping,   0 stopped,   0 zombie %Cpu(s):  4.0 us,  1.2 sy,  0.0 ni, 94.5 id,  0.0 wa,  0.0 hi,  0.3 si,  0.0 st MiB Mem :   7551.8 total,    220.8 free,   7008.6 used,    322.3 buff\/cache MiB Swap:      0.0 total,      0.0 free,      0.0 used.    295.5 avail Mem     PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                                 22739 root      20   0 8646580   5.0g  14500 S  23.3 68.2   1485:21 java                                                                                                     1563 root      20   0 1005204  13264   2308 S   0.3  0.2  64:57.91 \/usr\/local\/clou                                                                                           859 root      20   0  574296  11484    188 S   0.0  0.1   1:33.52 tuned                                                                                                     380 root      20   0   47652  10988  10636 S   0.0  0.1   0:03.24 systemd-journal <\/code><\/pre>\n
\u6211\u7684\u7591\u95ee\u662f\u8fd9\u4e24\u4e2a\u6570\u636e\u5230\u5e95\u662f\u600e\u4e48\u7b97\u7684 [\u6342\u8138] \uff0c\u4e3a\u5565 free \u663e\u793a\u5360\u7528 6.8G \uff0c\u4f46\u662f top \u91cc\u53ea\u770b\u5230 5.0G \u7684\u5185\u5b58\u5360\u7528\u3002<\/p>\n
\u76ee\u524d\u6709\u70b9\u6000\u7591\u662f\u5426\u662f\u5185\u5b58\u6cc4\u9732\u5bfc\u81f4\uff1f\u8fd8\u662f\u56e0\u4e3a top \u5185\u7edf\u8ba1\u4e0d\u5230\u5806\u5916\u5185\u5b58\u4e4b\u7c7b\u7684\uff1f<\/p>\n
\u6c42\u6559\u5927\u4f6c\u4eec\u89e3\u60d1\uff0c\u8c22\u8c22\uff01<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (9<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : XiaoxiaoPu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 cat \/proc\/meminfo \u770b\u4e0b\u30025.0G \u53ea\u662f\u90a3\u4e00\u4e2a\u8fdb\u7a0b\u5360\u7528\u7684\u5185\u5b58\uff0c\u5176\u4ed6\u8fdb\u7a0b\u3001\u5185\u6838\u3001\u786c\u4ef6\u90fd\u4f1a\u4f7f\u7528\u5185\u5b58\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5957\u63a5\u5b57\u4f1a\u7528\u5185\u6838\u5185\u5b58\u5427\uff0c\u867d\u7136\u4e0d\u77e5\u9053\u7528\u4e86\u591a\u5c11\u3002
    \u8bdd\u8bf4\u65e2\u7136\u8dd1 Java \u4e86\u4e0d\u5982\u5185\u5b58\u591a\u7ed9\u70b9\uff0c\u6211\u4eec\u8dd1 Java \u7684\u5c0f\u9e21\u7ed9\u4e86 128G \u5185\u5b58\u57fa\u672c\u4e0d\u62c5\u5fc3\u5185\u5b58\u5360\u7528\u7684\u95ee\u9898\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : nuk <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd8\u6709 slab \u5440\uff0c\u90fd\u4e0d\u7b97\u5728 RES \u91cc\u9762\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : jaynos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @XiaoxiaoPu @nuk \u611f\u8c22\uff0c\u5b66\u5230\u4e86\u65b0\u77e5\u8bc6\uff01\u6839\u636e http:\/\/linuxperf.com\/?p=142 \u8fd9\u7bc7\u6587\u7ae0\u6240\u8bf4\uff0c\u6211\u8ba1\u7b97\u4e86\u4e0b meminfo \u91cc\u7684\u7edf\u8ba1\u6570\u636e\uff0c\u8fd8\u662f\u6709\u4e9b\u4f1a\u5bf9\u4e0d\u4e0a\uff0c\u6309\u6587\u7ae0\u6240\u8bf4\uff0c\u5dee\u7684\u5927\u6982 1g \u5185\u5b58\u53ef\u80fd\u662f\u56e0\u4e3a alloc_pages\/__get_free_page \u5206\u914d\u7684\uff1f<\/p>\n
    @msg7086 \u6839\u636e https:\/\/zhuanlan.zhihu.com\/p\/25241630 \u8fd9\u7bc7\u6587\u7ae0\uff0c\u5c31\u7b97 1 \u4e2a tcp \u8fde\u63a5\u5360\u7528 8k \u5185\u5b58\uff0c2w \u4e2a\u8fde\u63a5\u4e5f\u4e0d\u8fc7 150M \u5de6\u53f3 [\u6342\u8138] <\/p>\n
    \u6211\u6709\u70b9\u7591\u60d1\u7684\u662f\u4e0d\u77e5\u9053\u5806\u5916\u5185\u5b58\u4f1a\u4e0d\u4f1a\u88ab\u7edf\u8ba1\u5230 RES \u4e2d\uff0c\u56e0\u4e3a\u4ece\u7f51\u4e0a\u4e00\u4e9b\u5185\u5b58\u6cc4\u9732\u7684\u6392\u67e5\u8fc7\u7a0b\u4e2d\u6709\u63d0\u5230 zip \u538b\u7f29\u7684\u95ee\u9898\uff08 https:\/\/www.cnblogs.com\/aipaojiao\/p\/13680207.html \uff09\uff0c\u800c\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u662f\u6709\u7528\u5230 websocket \u7684 permessage-deflate \u6269\u5c55\u7684\uff08 https:\/\/tools.ietf.org\/html\/rfc7692 \uff09<\/p>\n
    “`plain
    \/\/ \u53bb\u6389\u4e86\u4e3a 0KB \u7684\u5b57\u6bb5
    MemTotal: 7733012 kB \/\/ 7551.78M
    MemFree: 215988 kB \/\/ 210.93M
    MemAvailable: 280524 kB \/\/ 273.95M
    Buffers: 28368 kB \/\/ 27.70M
    Cached: 225080 kB \/\/ 219.80M
    Active: 5467844 kB \/\/ 5339.60M
    Inactive: 111284 kB \/\/ 108.68M
    Active(anon): 5325980 kB \/\/ 5201.15M
    Inactive(anon): 236 kB \/\/ 0.23M
    Active(file): 141864 kB \/\/ 138.54M
    Inactive(file): 111048 kB \/\/ 108.45M
    Dirty: 440 kB \/\/ 0.43M
    AnonPages: 5325680 kB \/\/ 5200.86M
    Mapped: 46940 kB \/\/ 45.84M
    Shmem: 536 kB \/\/ 0.52M
    Slab: 143460 kB \/\/ 140.10M
    SReclaimable: 64056 kB \/\/ 62.55M
    SUnreclaim: 79404 kB \/\/ 77.54M
    KernelStack: 6816 kB \/\/ 6.66M
    PageTables: 15420 kB \/\/ 15.06M
    CommitLimit: 3866504 kB \/\/ 3775.88M
    Committed_AS: 5697572 kB \/\/ 5564.04M
    VmallocTotal: 34359738367 kB \/\/ 32768G
    VmallocUsed: 20152 kB \/\/ 19.68M
    VmallocChunk: 34359712252 kB \/\/ 32767.98G
    Percpu: 704 kB \/\/ 0.69M
    AnonHugePages: 4769792 kB \/\/ 4658M
    HugePages_Total: 0
    HugePages_Free: 0
    HugePages_Rsvd: 0
    HugePages_Surp: 0
    Hugepagesize: 2048 kB \/\/ 2M
    DirectMap4k: 66232 kB \/\/ 64.68M
    DirectMap2M: 3848192 kB \/\/ 3758M
    DirectMap1G: 4194304 kB \/\/ 4096M
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : kele1997 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u5e94\u8be5\u518d\u770b\u770b 1 \u8bf4\uff0c\u4f60\u7684 top \u90a3\u4e2a 5G \u662f java \u5355\u4e2a\u7a0b\u5e8f\u7684\u5360\u7528\u7684\u5185\u5b58 <\/p>\n
    top \u663e\u793a\u5360\u7528\u7684\u5185\u5b58\u662f 7008.6 MB\uff0c \u800c free -h \u770b\u5230\u4e86\u53ea\u6709 6.8G \uff0c\u8fd9\u4e48\u770b\u6765\u4e24\u8005\u76f8\u5dee 200MB \u5de6\u53f3\u3002\u3002
    \u6839\u672c\u5c31\u6ca1\u6709\u76f8\u5dee 1g \u5185\u5b58 <\/p>\n
    “`
    MiB Mem : 7551.8 total, 220.8 free, 7008.6 used, 322.3 buff\/cache
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : XiaoxiaoPu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6267\u884c slabtop \u518d\u770b\u770b\u5462\uff1f\u6211\u731c\u6d4b\u8fd8\u662f socket \u5360\u7528\u7684\u5185\u5b58\uff0c\u300c\u5c31\u7b97 1 \u4e2a tcp \u8fde\u63a5\u5360\u7528 8k \u5185\u5b58\uff0c2w \u4e2a\u8fde\u63a5\u4e5f\u4e0d\u8fc7 150M \u5de6\u53f3\u300d\u8fd9\u4e2a\u53ea\u662f\u7c97\u7565\u4f30\u8ba1\uff0c\u6bcf\u4e2a\u8fde\u63a5\u5360\u7528\u7684\u5185\u5b58\u662f\u52a8\u6001\u7684\u3002\u5047\u5982\u7f51\u7edc\u6570\u636e\u5f88\u591a\uff0c\u5e94\u7528\u7a0b\u5e8f\u4ece socket \u8bfb\u53d6\u6570\u636e\u4e4b\u524d\u3001socket \u628a\u6570\u636e\u53d1\u7ed9\u7f51\u5361\u4e4b\u524d\uff0c\u90fd\u8981\u4f7f\u7528\u5185\u5b58\u6765\u6682\u5b58\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : jaynos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @kele1997 #5 \u53ef\u80fd\u662f\u6211\u6ca1\u8868\u8fbe\u6e05\u695a\uff0c\u6211\u7684\u60f3\u6cd5\u662f\uff0c\u8fd9\u53f0\u673a\u5668\u53ea\u8fd0\u884c\u4e86\u4e00\u4e2a java \u7a0b\u5e8f\uff0c\u5728 top \u91cc\u663e\u793a RES \u4e3a 5g\uff0c\u4f46\u662f free \u91cc\u663e\u793a\u5df2\u7528 6.8g \u3002\u7136\u540e\u6839\u636e 1 \u6240\u8bf4\u6211\u53bb\u67e5\u4e86\u76f8\u5173\u8d44\u6599\uff0c\u73b0\u5b66\u73b0\u5356\u53d1\u73b0\u8fd8\u662f\u4f1a\u6709 1g \u7684\u5185\u5b58\u51fa\u5165\uff08 slab \u7b49\u52a0\u4e0a 5g \u4e4b\u540e\uff09<\/p>\n
    \u5728 free \u548c top \u91cc\u663e\u793a\u7684\u5dee\u8ddd\u5e94\u8be5\u90e8\u5206\u7f13\u5b58\u5bfc\u81f4\u7684\uff0c\u6211\u60f3\u8868\u8fbe\u7684\u662f\u5728 top \u6216\u8005 free \u91cc\u770b\u5230\u7684\u5185\u5b58\u5360\u7528\u4e0e\u5b9e\u9645\u8fdb\u7a0b\u76f8\u52a0\u76f8\u5dee\u8fc7\u5927\u7684\u95ee\u9898                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : jaynos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @XiaoxiaoPu #6 \u55ef\u54c8\uff0c\u6628\u665a\u6211\u4e5f\u770b\u5230\u4e86 [email protected]@@zhuanlan.zhihu.com\/p\/25241630 \u8fd9\u7bc7\u6587\u7ae0\u91cc\u7684\u8bb2\u89e3\uff0c\u7ed3\u5408\u6211\u7684\u5b9e\u9645\u60c5\u51b5\uff08\u7edd\u5927\u591a\u6570\u662f\u6bcf\u9694 20s \u7684 ping\/pong \u5fc3\u8df3\uff0c\u670d\u52a1\u7aef\u76f4\u63a5\u54cd\u5e94 pong\uff0c\u4e0d\u505a\u4efb\u4f55\u5904\u7406\uff09\u8003\u8651\uff0c\u6211\u89c9\u5f97 socket \u5e94\u8be5\u4e0d\u4f1a\u6682\u5b58\u8fd9\u4e48\u591a\u7684\u6570\u636e\u3002\u6628\u665a\u5347\u7ea7\u4e86\u670d\u52a1\u5668\uff0c\u73b0\u573a\u6570\u636e\u5df2\u7ecf\u6ca1\u4e86 [\u6342\u8138] \uff0c\u4e0d\u8fc7\u4eca\u5929\u770b\u4e86\u4e0b\uff0c\u5927\u81f4\u662f\u80fd\u5bf9\u7684\u4e0a\u4e86\u3002\u4ee5\u4e0b\u662f slabtop \u7684\u6570\u636e\uff0c\u770b\u8d77\u6765 socket \u5176\u5b9e\u4e5f\u6ca1\u6709\u90a3\u4e48\u5927\uff1f<\/p>\n
    “`plain
     Active \/ Total Objects (% used) : 381214 \/ 384110 (99.2%)
     Active \/ Total Slabs (% used) : 14068 \/ 14068 (100.0%)
     Active \/ Total Caches (% used) : 73 \/ 101 (72.3%)
     Active \/ Total Size (% used) : 136913.44K \/ 137986.20K (99.2%)
     Minimum \/ Average \/ Maximum Object : 0.01K \/ 0.36K \/ 8.00K<\/p>\n
     OBJS ACTIVE USE OBJ SIZE SLABS OBJ\/SLAB CACHE SIZE NAME 
     75054 74990 99% 0.19K 3574 21 14296K dentry 
     46956 46956 100% 0.10K 1204 39 4816K buffer_head 
     32832 32553 99% 0.06K 513 64 2052K kmalloc-64 
     23472 23296 99% 0.66K 978 24 15648K proc_inode_cache 
     21808 21455 98% 0.25K 1363 16 5452K kmalloc-256 
     21392 21261 99% 0.07K 382 56 1528K avc_node 
     21024 20410 97% 0.12K 657 32 2628K kmalloc-128 
     19900 19713 99% 0.62K 796 25 12736K sock_inode_cache 
     19710 19513 99% 2.06K 1314 15 42048K TCPv6 
     16286 16286 100% 0.12K 479 34 1916K kernfs_node_cache 
     14283 14283 100% 0.58K 529 27 8464K inode_cache 
     11744 11744 100% 1.00K 734 16 11744K ext4_inode_cache 
     11424 11424 100% 0.04K 112 102 448K selinux_inode_security 
     5418 5418 100% 0.21K 301 18 1204K vm_area_struct 
     4864 4864 100% 0.02K 19 256 76K kmalloc-16 
     4096 4096 100% 0.01K 8 512 32K kmalloc-8 
     3500 3500 100% 0.57K 125 28 2000K radix_tree_node 
     3366 2613 77% 0.08K 66 51 264K anon_vma 
     3315 3315 100% 0.05K 39 85 156K shared_policy_node 
     3264 3264 100% 0.04K 32 102 128K ext4_extent_status 
     1792 1792 100% 0.03K 14 128 56K kmalloc-32 
     1785 1785 100% 0.19K 85 21 340K kmalloc-192 
     1722 1722 100% 0.09K 41 42 164K kmalloc-96 
     1584 1584 100% 1.00K 99 16 1584K kmalloc-1024 
     1184 1079 91% 0.50K 74 16 592K kmalloc-512 
     1080 1080 100% 0.11K 30 36 120K jbd2_journal_head 
     912 912 100% 0.66K 38 24 608K shmem_inode_cache 
     680 680 100% 0.02K 4 170 16K fsnotify_mark_connector
     567 567 100% 0.19K 27 21 108K cred_jar 
     544 544 100% 0.12K 17 32 68K pid 
     540 540 100% 0.11K 15 36 60K task_delay_info 
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : jaynos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5176\u5b9e\u4ece\u963f\u91cc\u4e91\u76d1\u63a7\u6570\u636e\u663e\u793a\uff0c\u5185\u5b58\u5360\u7528\u662f\u9010\u6b65\u4e0a\u6da8\u7684\uff0c\u5927\u6982\u6bcf 5 \u5206\u949f\u4e0a\u6da8 0.01%\uff08~0.7m \uff09\uff0c\u6240\u4ee5\u6211\u6700\u521d\u7684\u8c03\u67e5\u65b9\u5411\u90fd\u662f\u4ee5\u5185\u5b58\u6cc4\u9732\u4e3a\u4e3b [\u6342\u8138]                                                             <\/div>\n<\/p><\/div>\n<\/li>\n
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