{"id":84863,"date":"2022-02-18T00:31:15","date_gmt":"2022-02-17T16:31:15","guid":{"rendered":"http:\/\/www.idc.net\/help\/84863\/"},"modified":"2022-02-18T00:31:15","modified_gmt":"2022-02-17T16:31:15","slug":"redis%e5%a6%82%e4%bd%95%e6%9f%a5%e7%9c%8b%e5%89%a9%e4%bd%99%e5%ae%b9%e9%87%8f%ef%bc%88redis%e6%9f%a5%e7%9c%8b%e5%89%a9%e4%bd%99%e5%ae%b9%e9%87%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/84863\/","title":{"rendered":"Redis\u5982\u4f55\u67e5\u770b\u5269\u4f59\u5bb9\u91cf\uff08redis\u67e5\u770b\u5269\u4f59\u5bb9\u91cf\uff09"},"content":{"rendered":"

Redis\u5982\u4f55\u67e5\u770b\u5269\u4f59\u5bb9\u91cf<\/p>\n<\/p>\n

Redis\u662f\u4e00\u79cd\u9ad8\u6027\u80fd\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u56e0\u5176\u5feb\u901f\u7684\u8bfb\u5199\u901f\u5ea6\u800c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8eWeb\u5e94\u7528\u3001\u7f13\u5b58\u3001\u6d88\u606f\u961f\u5217\u7b49\u573a\u666f\u4e2d\u3002\u968f\u7740\u4f7f\u7528Redis\u7684\u589e\u52a0\uff0c\u6211\u4eec\u9700\u8981\u5173\u6ce8Redis\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5c24\u5176\u662fRedis\u5269\u4f59\u5bb9\u91cf\uff0c\u4ee5\u907f\u514d\u7531\u4e8e\u5185\u5b58\u4e0d\u8db3\u5bfc\u81f4\u7684\u670d\u52a1\u5d29\u6e83\u7b49\u98ce\u9669\u3002<\/p>\n<\/p>\n

\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Redis\u547d\u4ee4\u67e5\u770bRedis\u5269\u4f59\u5bb9\u91cf\u3002<\/p>\n<\/p>\n

Redis\u5982\u4f55\u8ba1\u7b97\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/p>\n<\/p>\n

Redis\u5c06\u6240\u6709\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u56e0\u6b64\u5c3d\u7ba1Redis\u6027\u80fd\u5353\u8d8a\uff0c\u4f46\u662f\u6211\u4eec\u9700\u8981\u65f6\u523b\u5173\u6ce8Redis\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u4ee5\u907f\u514d\u5185\u5b58\u4e0d\u8db3\u5bfc\u81f4\u7684\u4e25\u91cd\u540e\u679c\u3002<\/p>\n<\/p>\n

Redis\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u53ef\u4ee5\u7531\u4ee5\u4e0b\u4e09\u4e2a\u65b9\u9762\u8fdb\u884c\u8bc4\u4f30\uff1a<\/p>\n<\/p>\n

1. \u5185\u5b58\u4f7f\u7528\u5cf0\u503c\uff08peak memory usage\uff09\uff1aRedis\u5728\u670d\u52a1\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u5185\u5b58\u5360\u7528\u7684\u6700\u5927\u503c\u3002<\/p>\n<\/p>\n

2. \u5185\u5b58\u4f7f\u7528\u91cf\uff08memory usage\uff09\uff1aRedis\u5f53\u524d\u5b9e\u4f8b\u6b63\u5728\u4f7f\u7528\u7684\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n<\/p>\n

3. Redis\u5269\u4f59\u5185\u5b58\uff08Redis free memory\uff09\uff1aRedis\u5b9e\u4f8b\u5269\u4f59\u7684\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n<\/p>\n

\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528REDIS MEMORY STATS\u547d\u4ee4\u67e5\u770bRedis\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3002\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n<\/p>\n

redis-cli MEMORY STATS
<\/pre>\n<\/p>\n
Redis\u5c06\u8fd4\u56de\u5982\u4e0b\u7c7b\u4f3c\u4e8e\u4ee5\u4e0bJSON\u683c\u5f0f\u7684\u5185\u5bb9\uff1a<\/p>\n<\/p>\n
{
    \"total.allocated\":999706824,
    \"total.active\":58132705,
    \"total.used\":58132705,
    \"rss\":50135040,
    \"rss.overhead\":0,
    \"mem.used\":8030528,
    \"mem.fragmentation_ratio\":0.14,
    \"mem.fragmentation_bytes\":12627177,
    \"mem.not_counted_for_evict\":0
}
<\/pre>\n<\/p>\n
\u5176\u4e2d\uff0c\u63a5\u4e0b\u6765\u5173\u6ce8\u7684\u662f \u201cmem.used\u201d\u548c\u201cmem.fragmentation_ratio\u201d\u3002<\/p>\n<\/p>\n
Redis\u539f\u7406\u662f\u53ea\u6709\u4f7f\u7528\u5185\u5b58\u624d\u4f1a\u5e9f\u7269\u3002\u5982\u679c\u6211\u4eec\u8fdb\u884c\u5927\u91cf\u64cd\u4f5c\u540e\u5bfc\u81f4Redis\u5185\u5b58\u5206\u914d\u65f6\u51fa\u73b0\u5185\u788e\u7247\uff0c\u5206\u914d\u7684\u5185\u5b58\u5e76\u4e0d\u80fd\u88ab\u76f4\u63a5\u5229\u7528\uff0cRedis\u5185\u5b58\u7ba1\u7406\u5c06\u5bfc\u81f4\u64cd\u4f5c\u4e2d\u74f6\u9888\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u547d\u4ee4redis-cli info\u6307\u4ee4\u540e\uff0c\u4f1a\u51fa\u73b0\u8bb0\u5fc6\u5185\u5b58\u4f7f\u7528\u7387\uff0cRedis\u7684fragmentation_ratio\u6ca1\u6709\u4e0b\u9650\uff0c\u5e76\u4e14\u503c\u53ef\u4ee5\u8fbe\u5230100\uff0c\u5e76\u4e14\u5728\u51e0\u79d2\u949f\u5185\u5c31\u53ef\u4ee5\u56de\u5230\u6b63\u5e38\u503c\u3002<\/p>\n<\/p>\n
\u4f46\u662f\u5982\u679c\u6211\u4eec\u6ca1\u6709\u6b63\u786e\u5730\u5bf9key\u6216value\u8fdb\u884c\u7ba1\u7406\uff0c\u8fd9\u53ef\u80fd\u540e\u679c\u5c06\u4e0d\u582a\u8bbe\u60f3\uff0c\u5c24\u5176\u662fRedis\u7f13\u5b58\u670d\u52a1\u4e0a\u53ef\u80fd\u5bfc\u81f4\u7cfb\u7edf\u591a\u6b21\u6b7b\u673a\uff0c\u7528\u6237\u4f53\u9a8c\u5927\u6253\u6298\u6263\u3002<\/p>\n<\/p>\n
Redis\u5982\u4f55\u67e5\u770b\u5269\u4f59\u5bb9\u91cf<\/p>\n<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Redis INFO\u547d\u4ee4\u67e5\u770bRedis\u5269\u4f59\u5bb9\u91cf\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<\/p>\n
redis-cli INFO memory
<\/pre>\n<\/p>\n
Redis\u5c06\u8fd4\u56de\u5982\u4e0b\u683c\u5f0f\u7684\u5185\u5bb9\uff1a<\/p>\n<\/p>\n
# Memory
used_memory:1006634768
used_memory_human:959.51M
used_memory_rss:1006634768
used_memory_rss_human:959.51M
used_memory_peak:1009726024
used_memory_peak_human:962.15M
total_system_memory:2023421952
total_system_memory_human:1.88G
used_memory_lua:36864
used_memory_lua_human:36.00K
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
mem_fragmentation_ratio:1.00
mem_allocator:jemalloc-4.0.3
active_defrag_running:0
lazyfree_pending_objects:0
<\/pre>\n<\/p>\n
\u5176\u4e2d\uff0c\u201cmaxmemory\u201d\u5b57\u6bb5\u8868\u793aRedis\u5b9e\u4f8b\u7684\u6700\u5927\u5185\u5b58\u9650\u5236\uff0c\u5982\u679c\u4e3a0\u5219\u8868\u793a\u6ca1\u6709\u8bbe\u7f6e\u9650\u5236\uff1b\u201cused_memory\u201d\u8868\u793aRedis\u5b9e\u4f8b\u5f53\u524d\u4f7f\u7528\u7684\u5185\u5b58\u5927\u5c0f\uff1b\u201cmem_fragmentation_ratio\u201d\u8868\u793aRedis\u7684\u5185\u5b58\u538b\u7f29\u7387\uff0c\u5982\u679c\u503c\u63a5\u8fd11\uff0c\u5219\u8868\u793aRedis\u5b58\u5728\u5185\u5b58\u788e\u7247\u3002<\/p>\n<\/p>\n
\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u67e5\u770bRedis\u5269\u4f59\u5185\u5b58\uff1a<\/p>\n<\/p>\n
\u201c`python<\/p>\n
import redis<\/p>\n<\/p>\n
r = redis.StrictRedis(host=\u2019localhost\u2019, port=6379, db=0)<\/p>\n
info = r.info()<\/p>\n
used_memory = int(info[\u2018used_memory\u2019])<\/p>\n
max_memory = int(info[\u2018maxmemory\u2019])<\/p>\n
if max_memory == 0:<\/p>\n
 free_memory = \u2018unlimited\u2019<\/p>\n
else:<\/p>\n
 free_memory = (max_memory \u2013 used_memory) \/ 1024 \/ 1024 \/ 1024<\/p>\n
print(free_memory)<\/p>\n

\u603b\u7ed3\uff1a

\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528Redis\u547d\u4ee4\u67e5\u770bRedis\u5269\u4f59\u5bb9\u91cf\u3002\u7531\u4e8eRedis\u5b58\u50a8\u6240\u6709\u6570\u636e\u90fd\u5728\u5185\u5b58\u4e2d\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u65f6\u523b\u5173\u6ce8Redis\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5c24\u5176\u662fRedis\u5269\u4f59\u5bb9\u91cf\uff0c\u4ee5\u907f\u514d\u7531\u4e8e\u5185\u5b58\u4e0d\u8db3\u5bfc\u81f4\u7684\u670d\u52a1\u5d29\u6e83\u7b49\u98ce\u9669\u3002\u901a\u8fc7\u672c\u6587\u4ecb\u7ecd\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u67e5\u770bRedis\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5e76\u53ca\u65f6\u53d1\u73b0\u6f5c\u5728\u7684\u5185\u5b58\u95ee\u9898\u3002
<\/pre>\n
\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u9996\u9009\u540e\u6d6a\u4e91\uff0c2H2G\u9996\u670810\u5143\u5f00\u901a\u3002
\u540e\u6d6a\u4e91\uff08www.IDC.Net\uff09\u63d0\u4f9b\u7b80\u5355\u597d\u7528\uff0c\u4ef7\u683c\u539a\u9053\u7684\u9999\u6e2f\/\u7f8e\u56fd\u4e91\u670d\u52a1\u5668\u548c\u72ec\u7acb\u670d\u52a1\u5668\u3002IDC+ISP+ICP\u8d44\u8d28\u3002ARIN\u548cAPNIC\u4f1a\u5458\u3002\u6210\u719f\u6280\u672f\u56e2\u961f15\u5e74\u884c\u4e1a\u7ecf\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Redis\u5982\u4f55\u67e5\u770b\u5269\u4f59\u5bb9\u91cf Redis\u662f\u4e00\u79cd\u9ad8\u6027\u80fd\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u56e0\u5176\u5feb\u901f\u7684\u8bfb\u5199\u901f\u5ea6\u800c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8eWeb\u5e94\u7528\u3001\u7f13 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-84863","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/84863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=84863"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/84863\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=84863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=84863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=84863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}