Often when debugging something the debug log has massive blobs in it one has to scroll over. These have no value and should be omitted or filtered out.
Sample
Fully initialised
Connected to database 0 at localhost
Connected to database 0 at localhost
DatabaseBase::query: Writes done: INSERT IGNORE INTO msg_resource (mr_lang,mr_resource,mr_blob,mr_timestamp) VALUES ('en','jquery.checkboxShiftClick','{}','20140701185106')
Unstubbing $wgLang on call of $wgLang::getCode from Message::inLanguage
User: got user 1 from cache
User: loading options for user 1 from override cache.
User: logged in from session
User: loading options for user 1 from override cache.
MessageCache::load: Loading en... got from local cache
DatabaseBase::query: Writes done: REPLACE INTO objectcache (keyname,value,exptime) VALUES ('alphawiki:resourceloader:filter:minify-js:7:f2e14537823b6d6224056b2250fe3474','?}?{۶????+d...<snip>...2x?ptt?0??O ?-? ','20380119031407')
wfClientAcceptsGzip: client accepts gzip.
wfGzipHandler() is compressing output
Version: unspecified
Severity: normal