mirror of https://github.com/apache/activemq.git
83 lines
3.8 KiB
Bash
83 lines
3.8 KiB
Bash
#! /bin/sh
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# ------------------------------------------------------------------------
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ------------------------------------------------------------------------
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# The following should be reasonably good values for most tests running
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# on Sun JVMs. Following is the analysis on which it is based. If it's total
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# gibberish to you, please study my article at
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# http://www.atg.com/portal/myatg/developer?paf_dm=full&paf_gear_id=1100010&detailArticle=true&id=9606
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#
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# JMeter objects can generally be grouped into three life-length groups:
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#
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# - Per-sample objects (results, DOMs,...). An awful lot of those.
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# Life length of milliseconds to a few seconds.
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#
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# - Per-run objects (threads, listener data structures,...). Not that many
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# of those unless we use the table or tree listeners on heavy runs.
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# Life length of minutes to several hours, from creation to start of next run.
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#
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# - Per-work-session objects (test plans, GUIs,...).
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# Life length: for the life of the JVM.
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# This is the base heap size -- you may increase or decrease it to fit your
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# system's memory availablity:
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HEAP="-Xms256m -Xmx256m"
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# There's an awful lot of per-sample objects allocated during test run, so we
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# need a large eden to avoid too frequent scavenges -- you'll need to tune this
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# down proportionally if you reduce the HEAP values above:
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NEW="-XX:NewSize=128m -XX:MaxNewSize=128m"
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# This ratio and target have been proven OK in tests with a specially high
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# amount of per-sample objects (the HtmlParserHTMLParser tests):
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# SURVIVOR="-XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=50%"
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# Think about it: trying to keep per-run objects in tenuring definitely
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# represents a cost, but where's the benefit? They won't disappear before
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# the test is over, and at that point we will no longer care about performance.
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#
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# So we will have JMeter do an explicit Full GC before starting a test run,
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# but then we won't make any effort (or spend any CPU) to keep objects
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# in tenuring longer than the life of per-sample objects -- which is hopefully
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# shorter than the period between two scavenges):
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#
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TENURING="-XX:MaxTenuringThreshold=2"
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# This evacuation ratio is OK (see the comments for SURVIVOR) during test
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# runs -- no so sure about operations that bring a lot of long-lived information into
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# memory in a short period of time, such as loading tests or listener data files.
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# Increase it if you experience OutOfMemory problems during those operations
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# without having gone through a lot of Full GC-ing just before the OOM:
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# EVACUATION="-XX:MaxLiveObjectEvacuationRatio=20%"
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# Avoid the RMI-induced Full GCs to run too frequently -- once every ten minutes
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# should be more than enough:
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RMIGC="-Dsun.rmi.dgc.client.gcInterval=600000 -Dsun.rmi.dgc.server.gcInterval=600000"
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# PermSize is a scam. Leave it like this:
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PERM="-XX:PermSize=64m -XX:MaxPermSize=64m"
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# Finally, some tracing to help in case things go astray:
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DEBUG="-verbose:gc -XX:+PrintTenuringDistribution"
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SERVER="-server"
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ARGS="$SERVER $HEAP $NEW $SURVIVOR $TENURING $EVACUATION $RMIGC $PERM $DEBUG"
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java -server -jar `dirname $0`/ApacheJMeter*.jar "$@"
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