tomcat version : v9.0.38
os: centos7.9
JAVA_OPTS="$JMX_MONITOR -server -Xms20g -Xmx20g -Xss512k -XX:+AggressiveOpts
-XX:+UseBiasedLocking -XX:+UseG1GC -XX:+UseFastAccessorMethods
-XX:MaxGCPauseMillis=100 -Djava.security.egd=file:/dev/./urandom
-XX:ParallelGCTh
reads=25 -XX:ConcGCThreads=6 -XX:NewRatio=1 -XX:SurvivorRatio=8
server.xml:
<Connector port="80"
protocol="org.apache.coyote.http11.Http11Nio2Protocol"
executor="tomcatThreadPool"
compression="on"
compressionMinSize="2048"
maxThreads="1000"
minSpareThreads="100"
enableLookups="false"
redirectPort="8443"
acceptCount="1000"
server="bj-jy-lsy163"5218R
maxHttpHeaderSize="1048576"
socket.processorCache="1000"
socket.bufferPoolSize="1000"
processorCache="1000"
keepAliveTimeout="10000"
maxKeepAliveRequests="-1"
connectionTimeout="5000"
disableUploadTimeout="true" URIEncoding="UTF-8" />
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-" />
question:
Our server Dell R440 originally has a 5218R CPU, which is 20 cores. Under the
above configuration, Tomcat occupies 50-60% of the CPU. The performance is ok
and the return speed is relatively low.The CPU usage remains the same, or even
slightly increases, while the return speed of the slow ones increases.
Theoretically, with the increase of CPU, the processing speed will be faster,
while the return speed should be reduced, which is very abnormal. Could you
help analyze the problem
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