$M.Preferences中清空以前的存储信息的方法

博客提及在普元移动平台进行存入空格的操作,还涉及 Preferences 及清空存储信息相关内容,但未详细展开。

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存入空格进去。
[root@localhost snort-2.9.20]# ps aux --sort=-%mem | head -n 11 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND elastic+ 77086 2.8 45.3 5926628 1749404 ? Ssl 13:12 2:50 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -XX:-OmitStackTraceInFastThrow -XX:+ShowCodeDetailsInExceptionMessages -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dio.netty.allocator.numDirectArenas=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Dlog4j2.formatMsgNoLookups=true -Djava.locale.providers=SPI,COMPAT --add-opens=java.base/java.io=ALL-UNNAMED -Djava.security.manager=allow -XX:+UseG1GC -Djava.io.tmpdir=/tmp/elasticsearch-7622450778843719240 -XX:+HeapDumpOnOutOfMemoryError -XX:+ExitOnOutOfMemoryError -XX:HeapDumpPath=/var/lib/elasticsearch -XX:ErrorFile=/var/log/elasticsearch/hs_err_pid%p.log -Xlog:gc*,gc+age=trace,safepoint:file=/var/log/elasticsearch/gc.log:utctime,pid,tags:filecount=32,filesize=64m -XX:+UnlockDiagnosticVMOptions -XX:G1NumCollectionsKeepPinned=10000000 -Xms1885m -Xmx1885m -XX:MaxDirectMemorySize=988807168 -XX:G1HeapRegionSize=4m -XX:InitiatingHeapOccupancyPercent=30 -XX:G1ReservePercent=15 -Des.path.home=/usr/share/elasticsearch -Des.path.conf=/etc/elasticsearch -Des.distribution.flavor=default -Des.distribution.type=rpm -Des.bundled_jdk=true -cp /usr/share/elasticsearch/lib/* org.elasticsearch.bootstrap.Elasticsearch -p /var/run/elasticsearch/elasticsearch.pid --quiet logstash 78580 1.6 19.4 4889740 751868 ? SNsl 13:29 1:23 /usr/share/logstash/jdk/bin/java -Xms1g -Xmx1g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djdk.io.File.enableADS=true -Djruby.compile.invokedynamic=true -Djruby.jit.threshold=0 -Djruby.regexp.interruptible=true -XX:+HeapDumpOnOutOfMemoryError -Djava.security.egd=file:/dev/urandom -Dlog4j2.isThreadContextMapInheritable=true -cp /usr/share/logstash/logstash-core/lib/jars/checker-qual-3.37.0.jar:/usr/share/logstash/logstash-core/lib/jars/commons-codec-1.14.jar:/usr/share/logstash/logstash-core/lib/jars/commons-compiler-3.1.0.jar:/usr/share/logstash/logstash-core/lib/jars/commons-logging-1.2.jar:/usr/share/logstash/logstash-core/lib/jars/error_prone_annotations-2.21.1.jar:/usr/share/logstash/logstash-core/lib/jars/failureaccess-1.0.1.jar:/usr/share/logstash/logstash-core/lib/jars/google-java-format-1.1.jar:/usr/share/logstash/logstash-core/lib/jars/guava-32.1.3-jre.jar:/usr/share/logstash/logstash-core/lib/jars/j2objc-annotations-2.8.jar:/usr/share/logstash/logstash-core/lib/jars/jackson-annotations-2.14.1.jar:/usr/share/logstash/logstash-core/lib/jars/jackson-core-2.14.1.jar:/usr/share/logstash/logstash-core/lib/jars/jackson-databind-2.14.1.jar:/usr/share/logstash/logstash-core/lib/jars/jackson-dataformat-cbor-2.14.1.jar:/usr/share/logstash/logstash-core/lib/jars/jackson-dataformat-yaml-2.14.1.jar:/usr/share/logstash/logstash-core/lib/jars/janino-3.1.0.jar:/usr/share/logstash/logstash-core/lib/jars/javassist-3.26.0-GA.jar:/usr/share/logstash/logstash-core/lib/jars/jruby-complete-9.2.20.1.jar:/usr/share/logstash/logstash-core/lib/jars/jsr305-3.0.2.jar:/usr/share/logstash/logstash-core/lib/jars/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/usr/share/logstash/logstash-core/lib/jars/log4j-1.2-api-2.17.1.jar:/usr/share/logstash/logstash-core/lib/jars/log4j-api-2.17.1.jar:/usr/share/logstash/logstash-core/lib/jars/log4j-core-2.17.1.jar:/usr/share/logstash/logstash-core/lib/jars/log4j-jcl-2.17.1.jar:/usr/share/logstash/logstash-core/lib/jars/log4j-slf4j-impl-2.17.1.jar:/usr/share/logstash/logstash-core/lib/jars/logstash-core.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.commands-3.6.0.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.contenttype-3.4.100.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.expressions-3.4.300.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.filesystem-1.3.100.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.jobs-3.5.100.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.resources-3.7.100.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.core.runtime-3.7.0.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.equinox.app-1.3.100.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.equinox.common-3.6.0.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.equinox.preferences-3.4.1.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.equinox.registry-3.5.101.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.jdt.core-3.10.0.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.osgi-3.7.1.jar:/usr/share/logstash/logstash-core/lib/jars/org.eclipse.text-3.5.101.jar:/usr/share/logstash/logstash-core/lib/jars/reflections-0.9.11.jar:/usr/share/logstash/logstash-core/lib/jars/slf4j-api-1.7.30.jar:/usr/share/logstash/logstash-core/lib/jars/snakeyaml-1.33.jar org.logstash.Logstash --path.settings /etc/logstash kibana 87484 3.8 6.1 11977548 235664 ? Rsl 14:45 0:19 /usr/share/kibana/bin/../node/bin/node /usr/share/kibana/bin/../src/cli/dist --logging.dest="/var/log/kibana/kibana.log" --pid.file="/run/kibana/kibana.pid" --deprecation.skip_deprecated_settings[0]="logging.dest" admin 2435 0.6 3.3 3716180 131136 ? Sl 07:12 3:02 /usr/bin/gnome-shell admin 2780 0.0 1.3 1317520 52164 ? Sl 07:12 0:03 /usr/bin/gnome-software --gapplication-service root 1812 0.2 1.1 384988 46096 tty1 Ssl+ 07:12 1:06 /usr/bin/X :0 -background none -noreset -audit 4 -verbose -auth /run/gdm/auth-for-gdm-Ycs6w0/database -seat seat0 -nolisten tcp vt1 admin 3206 0.1 0.3 766860 13744 ? Sl 07:13 0:36 /usr/libexec/gnome-terminal-server admin 2718 0.0 0.2 984720 10380 ? Sl 07:12 0:01 nautilus-desktop --force root 522 0.0 0.2 48724 8236 ? Ss 07:12 0:01 /usr/lib/systemd/systemd-journald geoclue 3057 0.0 0.1 457860 7508 ? Ssl 07:13 0:00 /usr/libexec/geoclue -t 5 检查有哪些不需要的文件占用内存,并删除
05-13
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