P4
In most of the documentation http://openjdk.java.net/jeps/158 refer "rt" tag, which actually doesn't exist
9 ea b181 Available log tags:
add, age, alloc, aot, annotation, arguments, attach, barrier, biasedlocking, blocks, bot, breakpoint, census, class, classhisto, cleanup, compaction, constraints, constantpool, coops, cpu, cset, data, defaultmethods, dump, ergo, exceptions, exit, fingerprint, freelist, gc, hashtables, heap, humongous, ihop, iklass, init, itables, jni, jvmti, liveness, load, loader, logging, mark, marking, methodcomparator, metadata, metaspace, mmu, module, monitorinflation, monitormismatch, nmethod, normalize, objecttagging, obsolete, oopmap, os, pagesize, patch, path, phases, plab, promotion, preorder, protectiondomain, ref, redefine, refine, region, remset, purge, resolve, safepoint, scavenge, scrub, stacktrace, stackwalk, start, startuptime, state, stats, stringdedup, stringtable, stackmap, subclass, survivor, sweep, task, thread, tlab, time, timer, update, unload, verification, verify, vmoperation, vtables, workgang, jfr, system, parser, bytecode, setting, event
Doumentation of http://openjdk.java.net/jeps/158 refer "rt", check below case
-Xlog:gc*=info,rt*=off
- log messages tagged with at least 'gc' using 'info' level but turn
off logging of messages tagged with 'rt'
- messages tagged with both 'gc' and 'rt' will not be logged
- default output of all messages at level 'warning' to 'stderr'
will still be in effect
-Xlog:disable -Xlog:rt=trace:rttrace.txt
- turn off 'all' logging, even warnings and errors, except
messages tagged with 'rt' using 'trace' level
- output to a file called 'rttrace.txt'
Complex examples:
-Xlog:gc+rt*=debug
- log messages tagged with at least 'gc' and 'rt' tag using 'debug'
level to 'stdout'
- default output of all messages at level 'warning' to 'stderr'
will still be in effect
-Xlog:gc+meta*=trace,rt*=off:file=gcmetatrace.txt
- log messages tagged with at least 'gc' and 'meta' tag using 'trace'
level to file 'metatrace.txt' but turn off all messages tagged
with 'rt'
- again, messages tagged with 'gc', 'meta' and 'rt' will not be logged
since 'rt' is set to off
- default output of all messages at level 'warning' to 'stderr'
will still be in effect
This will be misleading for novice users
9 ea b181 Available log tags:
add, age, alloc, aot, annotation, arguments, attach, barrier, biasedlocking, blocks, bot, breakpoint, census, class, classhisto, cleanup, compaction, constraints, constantpool, coops, cpu, cset, data, defaultmethods, dump, ergo, exceptions, exit, fingerprint, freelist, gc, hashtables, heap, humongous, ihop, iklass, init, itables, jni, jvmti, liveness, load, loader, logging, mark, marking, methodcomparator, metadata, metaspace, mmu, module, monitorinflation, monitormismatch, nmethod, normalize, objecttagging, obsolete, oopmap, os, pagesize, patch, path, phases, plab, promotion, preorder, protectiondomain, ref, redefine, refine, region, remset, purge, resolve, safepoint, scavenge, scrub, stacktrace, stackwalk, start, startuptime, state, stats, stringdedup, stringtable, stackmap, subclass, survivor, sweep, task, thread, tlab, time, timer, update, unload, verification, verify, vmoperation, vtables, workgang, jfr, system, parser, bytecode, setting, event
Doumentation of http://openjdk.java.net/jeps/158 refer "rt", check below case
-Xlog:gc*=info,rt*=off
- log messages tagged with at least 'gc' using 'info' level but turn
off logging of messages tagged with 'rt'
- messages tagged with both 'gc' and 'rt' will not be logged
- default output of all messages at level 'warning' to 'stderr'
will still be in effect
-Xlog:disable -Xlog:rt=trace:rttrace.txt
- turn off 'all' logging, even warnings and errors, except
messages tagged with 'rt' using 'trace' level
- output to a file called 'rttrace.txt'
Complex examples:
-Xlog:gc+rt*=debug
- log messages tagged with at least 'gc' and 'rt' tag using 'debug'
level to 'stdout'
- default output of all messages at level 'warning' to 'stderr'
will still be in effect
-Xlog:gc+meta*=trace,rt*=off:file=gcmetatrace.txt
- log messages tagged with at least 'gc' and 'meta' tag using 'trace'
level to file 'metatrace.txt' but turn off all messages tagged
with 'rt'
- again, messages tagged with 'gc', 'meta' and 'rt' will not be logged
since 'rt' is set to off
- default output of all messages at level 'warning' to 'stderr'
will still be in effect
This will be misleading for novice users