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// top.cpp
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pch.h"
#include "client/dbclient.h"
#include "db/json.h"
#include "../util/text.h"
#include "tool.h"
#include <fstream>
#include <iostream>
#include <boost/program_options.hpp>
namespace po = boost::program_options;
namespace mongo {
class TopTool : public Tool {
public:
TopTool() : Tool( "top" , REMOTE_SERVER , "admin" ) {
_sleep = 1;
add_hidden_options()
( "sleep" , po::value<int>() , "time to sleep between calls" )
;
addPositionArg( "sleep" , 1 );
_autoreconnect = true;
}
BSONObj getData() {
BSONObj out;
if ( ! conn().simpleCommand( _db , &out , "top" ) ) {
cout << "error: " << out << endl;
return BSONObj();
}
return out.getOwned();
}
void printDiff( BSONObj prev , BSONObj now ) {
if ( ! prev["totals"].isABSONObj() ||
! now["totals"].isABSONObj() ) {
cout << "." << endl;
return;
}
prev = prev["totals"].Obj();
now = now["totals"].Obj();
vector<NSInfo> data;
unsigned longest = 30;
BSONObjIterator i( now );
while ( i.more() ) {
BSONElement e = i.next();
// invalid, data fixed in 1.8.0
if ( e.fieldName()[0] == '?' )
continue;
if ( ! str::contains( e.fieldName() , '.' ) )
continue;
BSONElement old = prev[e.fieldName()];
if ( old.eoo() )
continue;
if ( strlen( e.fieldName() ) > longest )
longest = strlen(e.fieldName());
data.push_back( NSInfo( e.fieldName() , old.Obj() , e.Obj() ) );
}
std::sort( data.begin() , data.end() );
cout << "\n"
<< setw(longest) << "ns"
<< "\ttotal"
<< "\tread"
<< "\twrite"
<< "\t\t" << terseCurrentTime()
<< endl;
for ( int i=data.size()-1; i>=0 && data.size() - i < 10 ; i-- ) {
cout << setw(longest) << data[i].ns
<< "\t" << setprecision(3) << data[i].diffTimeMS( "total" ) << "ms"
<< "\t" << setprecision(3) << data[i].diffTimeMS( "readLock" ) << "ms"
<< "\t" << setprecision(3) << data[i].diffTimeMS( "writeLock" ) << "ms"
<< endl;
}
}
int run() {
_sleep = getParam( "sleep" , _sleep );
auth();
BSONObj prev = getData();
while ( true ) {
sleepsecs( _sleep );
BSONObj now;
try {
now = getData();
}
catch ( std::exception& e ) {
cout << "can't get data: " << e.what() << endl;
continue;
}
if ( now.isEmpty() )
return -2;
try {
printDiff( prev , now );
}
catch ( AssertionException& e ) {
cout << "\nerror: " << e.what() << "\n"
<< now
<< endl;
}
prev = now;
}
return 0;
}
struct NSInfo {
NSInfo( string thens , BSONObj a , BSONObj b ) {
ns = thens;
prev = a;
cur = b;
timeDiff = diffTime( "total" );
}
int diffTimeMS( const char * field ) const {
return (int)(diffTime( field ) / 1000);
}
double diffTime( const char * field ) const {
return diff( field , "time" );
}
double diffCount( const char * field ) const {
return diff( field , "count" );
}
/**
* @param field total,readLock, etc...
* @param type time or count
*/
double diff( const char * field , const char * type ) const {
return cur[field].Obj()[type].number() - prev[field].Obj()[type].number();
}
bool operator<(const NSInfo& r) const {
return timeDiff < r.timeDiff;
}
string ns;
BSONObj prev;
BSONObj cur;
double timeDiff; // time diff between prev and cur
};
private:
int _sleep;
};
}
int main( int argc , char ** argv ) {
mongo::TopTool top;
return top.main( argc , argv );
}
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