why my redis command keys does not block my other operation
form many blog, i learn that the redis command keys * may block the redis server, and other command can not be execute on time .
however, today i run the keys * on my db which has about 8million data.
and then i use my other client to exec other command like get or set, this all work well, and give response on time.
so, i'm confused that why my command keys not block.
the picture is https://i.stack.imgur.com/8flt4.png
redis redis-cli
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
add a comment |
form many blog, i learn that the redis command keys * may block the redis server, and other command can not be execute on time .
however, today i run the keys * on my db which has about 8million data.
and then i use my other client to exec other command like get or set, this all work well, and give response on time.
so, i'm confused that why my command keys not block.
the picture is https://i.stack.imgur.com/8flt4.png
redis redis-cli
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
add a comment |
form many blog, i learn that the redis command keys * may block the redis server, and other command can not be execute on time .
however, today i run the keys * on my db which has about 8million data.
and then i use my other client to exec other command like get or set, this all work well, and give response on time.
so, i'm confused that why my command keys not block.
the picture is https://i.stack.imgur.com/8flt4.png
redis redis-cli
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
form many blog, i learn that the redis command keys * may block the redis server, and other command can not be execute on time .
however, today i run the keys * on my db which has about 8million data.
and then i use my other client to exec other command like get or set, this all work well, and give response on time.
so, i'm confused that why my command keys not block.
the picture is https://i.stack.imgur.com/8flt4.png
redis redis-cli
redis redis-cli
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
asked Nov 12 '18 at 11:43
Lucas gaoLucas gao
82
82
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
KEYS (and almost any other Redis command for that matter) is blocking, do not be fooled :)
While Redis is scanning its internal dictionary and assembling the response, it is blocked. However, after the response is ready and moved to the network layer, the server is free to process the next operations. Your client, in the meanwhile, is blocked from the time it sent KEYS until the entire response is received by it.
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53261450%2fwhy-my-redis-command-keys-does-not-block-my-other-operation%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
KEYS (and almost any other Redis command for that matter) is blocking, do not be fooled :)
While Redis is scanning its internal dictionary and assembling the response, it is blocked. However, after the response is ready and moved to the network layer, the server is free to process the next operations. Your client, in the meanwhile, is blocked from the time it sent KEYS until the entire response is received by it.
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
add a comment |
KEYS (and almost any other Redis command for that matter) is blocking, do not be fooled :)
While Redis is scanning its internal dictionary and assembling the response, it is blocked. However, after the response is ready and moved to the network layer, the server is free to process the next operations. Your client, in the meanwhile, is blocked from the time it sent KEYS until the entire response is received by it.
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
add a comment |
KEYS (and almost any other Redis command for that matter) is blocking, do not be fooled :)
While Redis is scanning its internal dictionary and assembling the response, it is blocked. However, after the response is ready and moved to the network layer, the server is free to process the next operations. Your client, in the meanwhile, is blocked from the time it sent KEYS until the entire response is received by it.
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
KEYS (and almost any other Redis command for that matter) is blocking, do not be fooled :)
While Redis is scanning its internal dictionary and assembling the response, it is blocked. However, after the response is ready and moved to the network layer, the server is free to process the next operations. Your client, in the meanwhile, is blocked from the time it sent KEYS until the entire response is received by it.
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
answered Nov 12 '18 at 13:42
Itamar HaberItamar Haber
28.2k43760
28.2k43760
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
add a comment |
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
Excellent answer!
– for_stack
Nov 13 '18 at 1:35
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53261450%2fwhy-my-redis-command-keys-does-not-block-my-other-operation%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
