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https://issues.apache.org/jira/browse/SOLR-9815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15728630#comment-15728630
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Gethin James commented on SOLR-9815:
------------------------------------
A work around for windows is {code}set "GC_LOG_OPTS= "{code}
The relavant logic from solr/bin/solr:
{code}
# Establish default opts no env var set (otherwise init to empty)
if [ -z ${GC_LOG_OPTS+x} ]; then
GC_LOG_OPTS=('-verbose:gc' '-XX:+PrintHeapAtGC' '-XX:+PrintGCDetails' \
'-XX:+PrintGCDateStamps' '-XX:+PrintGCTimeStamps'
'-XX:+PrintTenuringDistribution' \
'-XX:+PrintGCApplicationStoppedTime')
else
GC_LOG_OPTS=($GC_LOG_OPTS)
fi
# if verbose gc logging enabled, setup the location of the log file and rotation
if [ "$GC_LOG_OPTS" != "" ]; then
gc_log_flag="-Xloggc"
if [ "$JAVA_VENDOR" == "IBM J9" ]; then
gc_log_flag="-Xverbosegclog"
fi
GC_LOG_OPTS+=("$gc_log_flag:$SOLR_LOGS_DIR/solr_gc.log"
-XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=9 -XX:GCLogFileSize=20M)
fi
{code}
and from solr.cmd:
{code}
IF "%GC_LOG_OPTS%"=="" (
set GC_LOG_OPTS=-verbose:gc ^
-XX:+PrintHeapAtGC ^
-XX:+PrintGCDetails ^
-XX:+PrintGCDateStamps ^
-XX:+PrintGCTimeStamps ^
-XX:+PrintTenuringDistribution ^
-XX:+PrintGCApplicationStoppedTime
)
{code}
[~janhoy] Was the plan to keep verbose garbage collection logging on by default?
> Verbose Garbage Collection logging is on by default
> ---------------------------------------------------
>
> Key: SOLR-9815
> URL: https://issues.apache.org/jira/browse/SOLR-9815
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: logging
> Affects Versions: 6.3
> Reporter: Gethin James
> Priority: Minor
>
> There have been some excellent logging fixes in 6.3
> (http://www.cominvent.com/2016/11/07/solr-logging-just-got-better/). However
> now, by default, Solr is logging a great deal of garbage collection
> information.
> It seems that this logging is excessive, can we make the default logging to
> not be verbose?
> For linux/mac setting GC_LOG_OPTS="" in solr.in.sh seems to work around the
> issue, but looking at solr.cmd I don't think that will work for windows.
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