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	12	<img style="border:none" alt="Redis Documentation" src="redis.png">
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	17	<div class="index">
	18	<!-- This is a (PRE) block. Make sure it's left aligned or your toc title will be off. -->
	19	<b>Benchmarks: Contents</b><br>  <a href="#How Fast is Redis?">How Fast is Redis?</a><br>  <a href="#Latency percentiles">Latency percentiles</a>
	20	</div>
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	22	<h1 class="wikiname">Benchmarks</h1>
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	24	<div class="summary">
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	26	</div>
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	28	<div class="narrow">
	29	<h1><a name="How Fast is Redis?">How Fast is Redis?</a></h1>Redis includes the <code name="code" class="python">redis-benchmark</code> utility that simulates SETs/GETs done by N clients at the same time sending M total queries (it is similar to the Apache's <code name="code" class="python">ab</code> utility). Below you'll find the full output of the benchmark executed against a Linux box.<br/><br/><ul><li> The test was done with 50 simultaneous clients performing 100000 requests.</li><li> The value SET and GET is a 256 bytes string.</li><li> The Linux box is running <b>Linux 2.6</b>, it's <b>Xeon X3320 2.5Ghz</b>.</li><li> Text executed using the loopback interface (127.0.0.1).</li></ul>
	30	Results: <b>about 110000 SETs per second, about 81000 GETs per second.</b><h1><a name="Latency percentiles">Latency percentiles</a></h1><pre class="codeblock python" name="code">
	31	./redis-benchmark -n 100000
	32
	33	====== SET ======
	34	100007 requests completed in 0.88 seconds
	35	50 parallel clients
	36	3 bytes payload
	37	keep alive: 1
	38
	39	58.50% <= 0 milliseconds
	40	99.17% <= 1 milliseconds
	41	99.58% <= 2 milliseconds
	42	99.85% <= 3 milliseconds
	43	99.90% <= 6 milliseconds
	44	100.00% <= 9 milliseconds
	45	114293.71 requests per second
	46
	47	====== GET ======
	48	100000 requests completed in 1.23 seconds
	49	50 parallel clients
	50	3 bytes payload
	51	keep alive: 1
	52
	53	43.12% <= 0 milliseconds
	54	96.82% <= 1 milliseconds
	55	98.62% <= 2 milliseconds
	56	100.00% <= 3 milliseconds
	57	81234.77 requests per second
	58
	59	====== INCR ======
	60	100018 requests completed in 1.46 seconds
	61	50 parallel clients
	62	3 bytes payload
	63	keep alive: 1
	64
	65	32.32% <= 0 milliseconds
	66	96.67% <= 1 milliseconds
	67	99.14% <= 2 milliseconds
	68	99.83% <= 3 milliseconds
	69	99.88% <= 4 milliseconds
	70	99.89% <= 5 milliseconds
	71	99.96% <= 9 milliseconds
	72	100.00% <= 18 milliseconds
	73	68458.59 requests per second
	74
	75	====== LPUSH ======
	76	100004 requests completed in 1.14 seconds
	77	50 parallel clients
	78	3 bytes payload
	79	keep alive: 1
	80
	81	62.27% <= 0 milliseconds
	82	99.74% <= 1 milliseconds
	83	99.85% <= 2 milliseconds
	84	99.86% <= 3 milliseconds
	85	99.89% <= 5 milliseconds
	86	99.93% <= 7 milliseconds
	87	99.96% <= 9 milliseconds
	88	100.00% <= 22 milliseconds
	89	100.00% <= 208 milliseconds
	90	88109.25 requests per second
	91
	92	====== LPOP ======
	93	100001 requests completed in 1.39 seconds
	94	50 parallel clients
	95	3 bytes payload
	96	keep alive: 1
	97
	98	54.83% <= 0 milliseconds
	99	97.34% <= 1 milliseconds
	100	99.95% <= 2 milliseconds
	101	99.96% <= 3 milliseconds
	102	99.96% <= 4 milliseconds
	103	100.00% <= 9 milliseconds
	104	100.00% <= 208 milliseconds
	105	71994.96 requests per second
	106	</pre>Notes: changing the payload from 256 to 1024 or 4096 bytes does not change the numbers significantly (but reply packets are glued together up to 1024 bytes so GETs may be slower with big payloads). The same for the number of clients, from 50 to 256 clients I got the same numbers. With only 10 clients it starts to get a bit slower.<br/><br/>You can expect different results from different boxes. For example a low profile box like <b>Intel core duo T5500 clocked at 1.66Ghz running Linux 2.6</b> will output the following:
	107	<pre class="codeblock python python" name="code">
	108	./redis-benchmark -q -n 100000
	109	SET: 53684.38 requests per second
	110	GET: 45497.73 requests per second
	111	INCR: 39370.47 requests per second
	112	LPUSH: 34803.41 requests per second
	113	LPOP: 37367.20 requests per second
	114	</pre>Another one using a 64 bit box, a Xeon L5420 clocked at 2.5 Ghz:<br/><br/><pre class="codeblock python python python" name="code">
	115	./redis-benchmark -q -n 100000
	116	PING: 111731.84 requests per second
	117	SET: 108114.59 requests per second
	118	GET: 98717.67 requests per second
	119	INCR: 95241.91 requests per second
	120	LPUSH: 104712.05 requests per second
	121	LPOP: 93722.59 requests per second
	122	</pre>
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