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From Matt Kowalczyk <ma...@cloudability.com>
Subject Re: system.catalog and system.stats entries slows down bulk MR inserts by 20-25X (Phoenix 4.4)
Date Mon, 07 Dec 2015 22:45:15 GMT
bounced, just after major compaction, with the setting as indicated above.
I'm unable to disable the stats table.

select count(*) from system.stats where physical_name = 'XXXXX';
+------------------------------------------+
|                 COUNT(1)                 |
+------------------------------------------+
| 653                                      |
+------------------------------------------+
1 row selected (0.036 seconds)


On Mon, Dec 7, 2015 at 2:41 PM, James Taylor <jamestaylor@apache.org> wrote:

> Yes, setting that property is another way to disable stats. You'll need to
> bounce your cluster after setting either of these, and stats won't be
> updated until a major compaction occurs.
>
>
> On Monday, December 7, 2015, Matt Kowalczyk <mattk@cloudability.com>
> wrote:
>
>> I've set, phoenix.stats.guidepost.per.region to 1 and continue to see
>> entries added to the system.stats table. I believe this should have the
>> same effect? I'll try setting the guidepost width though.
>>
>>
>> On Mon, Dec 7, 2015 at 12:11 PM, James Taylor <jamestaylor@apache.org>
>> wrote:
>>
>>> You can disable stats through setting the phoenix.stats.guidepost.width
>>> config parameter to a larger value in the server side hbase-site.xml. The
>>> default is 104857600 (or 10MB). If you set it to your MAX_FILESIZE (the
>>> size you allow a region to grow to before it splits - default 20GB), then
>>> you're essentially disabling it. You could also try increasing it somewhere
>>> in between to maybe 5 or 10GB.
>>>
>>> Thanks,
>>> James
>>>
>>> On Mon, Dec 7, 2015 at 10:25 AM, Matt Kowalczyk <mattk@cloudability.com>
>>> wrote:
>>>
>>>> We're also encountering slow downs after bulk MR inserts. I've only
>>>> measured slow downs in the query path (since our bulk inserts workloads
>>>> vary in size it hasn't been clear that we see slow downs here but i'll now
>>>> measure this as well). The subject of my reported issue was titled, "stats
>>>> table causing slow queries".
>>>>
>>>> the stats table seems to be re-built during compactions and and I have
>>>> to actively purge the table to regain sane query times. Would be sweet if
>>>> the stats feature could be disabled.
>>>>
>>>> On Mon, Dec 7, 2015 at 9:53 AM, Thangamani, Arun <thangar@cobalt.com>
>>>> wrote:
>>>>
>>>>> This is on hbase-1.1.1.2.3.0.0-2557 if that would make any difference
>>>>> in analysis. Thanks
>>>>>
>>>>> From: Arun Thangamani <thangar@cobalt.com>
>>>>> Date: Monday, December 7, 2015 at 12:13 AM
>>>>> To: "user@phoenix.apache.org" <user@phoenix.apache.org>
>>>>> Subject: system.catalog and system.stats entries slows down bulk MR
>>>>> inserts by 20-25X (Phoenix 4.4)
>>>>>
>>>>> Hello, I noticed an issue with bulk insert through map reduce in
>>>>> phoenix 4.4.0.2.3.0.0-2557, using outline of the code below
>>>>>
>>>>> Normally the inserts of about 25 million rows complete in about 5
>>>>> mins, there are 5 region servers and the phoenix table has 32 buckets
>>>>> But sometimes (maybe after major compactions or region movement?),
>>>>> writes simply slow down to 90 mins, when I truncate SYSTEM.STATS hbase
>>>>> table, the inserts get a little faster (60 mins), but when I truncate
both
>>>>> SYSTEM.CATALOG & SYSTEM.STATS tables, and recreate the phoenix table
def(s)
>>>>> the inserts go back to 5 mins, the workaround of truncating SYSTEM tables
>>>>> is not sustainable for long, can someone help and let me know if there
is a
>>>>> patch available for this? Thanks in advance.
>>>>>
>>>>> Job job = Job.getInstance(conf, NAME);
>>>>> // Set the target Phoenix table and the columns
>>>>> PhoenixMapReduceUtil.setOutput(job, tableName,
>>>>> "WEB_ID,WEB_PAGE_LABEL,DEVICE_TYPE," +
>>>>>
>>>>>         "WIDGET_INSTANCE_ID,WIDGET_TYPE,WIDGET_VERSION,WIDGET_CONTEXT,"
>>>>> +
>>>>>         "TOTAL_CLICKS,TOTAL_CLICK_VIEWS,TOTAL_HOVER_TIME_MS,TOTAL_TIME_ON_PAGE_MS,TOTAL_VIEWABLE_TIME_MS,"
>>>>> +
>>>>>
>>>>>         "VIEW_COUNT,USER_SEGMENT,DIM_DATE_KEY,VIEW_DATE,VIEW_DATE_TIMESTAMP,ROW_NUMBER");
>>>>> FileInputFormat.setInputPaths(job, inputPath);
>>>>> job.setMapperClass(WidgetPhoenixMapper.class);
>>>>> job.setMapOutputKeyClass(NullWritable.class);
>>>>> job.setMapOutputValueClass(WidgetPagesStatsWritable.class);
>>>>> job.setOutputFormatClass(PhoenixOutputFormat.class);
>>>>> TableMapReduceUtil.addDependencyJars(job);
>>>>> job.setNumReduceTasks(0);
>>>>> job.waitForCompletion(true);
>>>>>
>>>>> public static class WidgetPhoenixMapper extends Mapper<LongWritable,
>>>>> Text, NullWritable, WidgetPagesStatsWritable> {
>>>>>     @Override
>>>>>     public void map(LongWritable longWritable, Text text, Context
>>>>> context) throws IOException, InterruptedException {
>>>>>         Configuration conf = context.getConfiguration();
>>>>>         String rundateString = conf.get("rundate");
>>>>>         PagesSegmentWidgetLineParser parser = new
>>>>> PagesSegmentWidgetLineParser();
>>>>>         try {
>>>>>             PagesSegmentWidget pagesSegmentWidget =
>>>>> parser.parse(text.toString());
>>>>>
>>>>>             if (pagesSegmentWidget != null) {
>>>>>                 WidgetPagesStatsWritable widgetPagesStatsWritable =
>>>>> new WidgetPagesStatsWritable();
>>>>>                 WidgetPagesStats widgetPagesStats = new
>>>>> WidgetPagesStats();
>>>>>
>>>>>
>>>>>                 widgetPagesStats.setWebId(pagesSegmentWidget.getWebId());
>>>>>
>>>>>                 widgetPagesStats.setWebPageLabel(pagesSegmentWidget.getWebPageLabel());
>>>>>
>>>>>                 widgetPagesStats.setWidgetInstanceId(pagesSegmentWidget.getWidgetInstanceId());
>>>>>                 …..
>>>>>
>>>>>
>>>>>                 widgetPagesStatsWritable.setWidgetPagesStats(widgetPagesStats);
>>>>>                 context.write(NullWritable.get(),
>>>>> widgetPagesStatsWritable);
>>>>>             }
>>>>>
>>>>>         }catch (Exception e){
>>>>>             e.printStackTrace();
>>>>>         }
>>>>>     }
>>>>> }
>>>>>
>>>>> public final class WidgetPagesStats {
>>>>>     private String webId;
>>>>>     private String webPageLabel;
>>>>>     private long widgetInstanceId;
>>>>>     private String widgetType;
>>>>>
>>>>>         …
>>>>>     @Override
>>>>>     public boolean equals(Object o) {
>>>>>
>>>>>         ..
>>>>>     }
>>>>>     @Override
>>>>>     public int hashCode() {
>>>>>
>>>>>         ..
>>>>>     }
>>>>>     @Override
>>>>>     public String toString() {
>>>>>         return "WidgetPhoenix{“….
>>>>>                 '}';
>>>>>     }
>>>>> }
>>>>>
>>>>> public class WidgetPagesStatsWritable implements DBWritable, Writable
{
>>>>>
>>>>>     private WidgetPagesStats widgetPagesStats;
>>>>>
>>>>>     public void readFields(DataInput input) throws IOException {
>>>>>         widgetPagesStats.setWebId(input.readLine());
>>>>>         widgetPagesStats.setWebPageLabel(input.readLine());
>>>>>         widgetPagesStats.setWidgetInstanceId(input.readLong());
>>>>>         widgetPagesStats.setWidgetType(input.readLine());
>>>>>
>>>>>         …
>>>>>     }
>>>>>
>>>>>     public void write(DataOutput output) throws IOException {
>>>>>         output.writeBytes(widgetPagesStats.getWebId());
>>>>>         output.writeBytes(widgetPagesStats.getWebPageLabel());
>>>>>
>>>>>         output.writeLong(widgetPagesStats.getWidgetInstanceId());
>>>>>         output.writeBytes(widgetPagesStats.getWidgetType());
>>>>>
>>>>>         ..
>>>>>     }
>>>>>
>>>>>     public void readFields(ResultSet rs) throws SQLException {
>>>>>         widgetPagesStats.setWebId(rs.getString("WEB_ID"));
>>>>>
>>>>>         widgetPagesStats.setWebPageLabel(rs.getString("WEB_PAGE_LABEL"));
>>>>>
>>>>>         widgetPagesStats.setWidgetInstanceId(rs.getLong("WIDGET_INSTANCE_ID"));
>>>>>         widgetPagesStats.setWidgetType(rs.getString("WIDGET_TYPE"));
>>>>>
>>>>>         …
>>>>>     }
>>>>>
>>>>>     public void write(PreparedStatement pstmt) throws SQLException {
>>>>>         Connection connection = pstmt.getConnection();
>>>>>         PhoenixConnection phoenixConnection = (PhoenixConnection)
>>>>> connection;
>>>>>         //connection.getClientInfo().setProperty("scn",
>>>>> Long.toString(widgetPhoenix.getViewDateTimestamp()));
>>>>>
>>>>>         pstmt.setString(1, widgetPagesStats.getWebId());
>>>>>         pstmt.setString(2, widgetPagesStats.getWebPageLabel());
>>>>>         pstmt.setString(3, widgetPagesStats.getDeviceType());
>>>>>
>>>>>         pstmt.setLong(4, widgetPagesStats.getWidgetInstanceId());
>>>>>
>>>>>         …
>>>>>     }
>>>>>
>>>>>     public WidgetPagesStats getWidgetPagesStats() {
>>>>>         return widgetPagesStats;
>>>>>     }
>>>>>
>>>>>     public void setWidgetPagesStats(WidgetPagesStats widgetPagesStats)
>>>>> {
>>>>>         this.widgetPagesStats = widgetPagesStats;
>>>>>     }
>>>>> }
>>>>>
>>>>>
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>>>>
>>>>
>>>
>>

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