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Spark patch #139

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Spark patch #139

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5bcd931
Create benchmark.sh
DoubleMindy Sep 19, 2023
358473c
Create .gitkeep
DoubleMindy Sep 19, 2023
e70c620
Create ClickBenchRunner.scala
DoubleMindy Sep 19, 2023
fbf4058
Create queries.sql
DoubleMindy Sep 19, 2023
70f5314
Update ClickBenchRunner.scala
DoubleMindy Sep 19, 2023
5486b1c
Delete spark/.gitkeep
DoubleMindy Sep 24, 2023
c700eaa
Merge branch 'main' into spark-patch
DoubleMindy Feb 5, 2024
465593f
Added Spark and HDFS deployment process
DoubleMindy Feb 5, 2024
e5434c6
Minor fixes (paths, no log redirection...)
DoubleMindy Feb 5, 2024
eeff7a6
Create log.txt
DoubleMindy Feb 5, 2024
67e5025
Added log-file support
DoubleMindy Feb 5, 2024
faff18b
Spark & HDFS folders updated
DoubleMindy Feb 7, 2024
600d2cd
Merge branch 'main' into spark-patch
DoubleMindy Feb 7, 2024
3f0fbf6
Fixed issues with JAVA_HOME, ssh connection and correct HDFS scripts …
DoubleMindy Feb 21, 2024
cdbe14d
Minor refactoring
DoubleMindy Feb 21, 2024
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144 changes: 144 additions & 0 deletions spark/ClickBenchRunner.scala
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import org.apache.spark.sql.{SparkSession, SQLContext}
import java.sql.Statement
import java.io.{File, FileWriter}
import scala.io.Source
import scala.io.Codec
import org.apache.spark.sql.types._

val spark = SparkSession.builder.enableHiveSupport().getOrCreate()
spark.sql("DROP TABLE IF EXISTS hits")
val logFile = "log.txt"

val file = new File(logFile)
val writer = new FileWriter(file)


val schema = StructType(
List(
StructField("WatchID", LongType, nullable = false),
StructField("JavaEnable", ShortType, nullable = false),
StructField("Title", StringType, nullable = false),
StructField("GoodEvent", ShortType, nullable = false),
StructField("EventTime", TimestampType, nullable = false),
StructField("EventDate", DateType, nullable = false),
StructField("CounterID", IntegerType, nullable = false),
StructField("ClientIP", IntegerType, nullable = false),
StructField("RegionID", IntegerType, nullable = false),
StructField("UserID", LongType, nullable = false),
StructField("CounterClass", ShortType, nullable = false),
StructField("OS", ShortType, nullable = false),
StructField("UserAgent", ShortType, nullable = false),
StructField("URL", StringType, nullable = false),
StructField("Referer", StringType, nullable = false),
StructField("IsRefresh", ShortType, nullable = false),
StructField("RefererCategoryID", ShortType, nullable = false),
StructField("RefererRegionID", IntegerType, nullable = false),
StructField("URLCategoryID", ShortType, nullable = false),
StructField("URLRegionID", IntegerType, nullable = false),
StructField("ResolutionWidth", ShortType, nullable = false),
StructField("ResolutionHeight", ShortType, nullable = false),
StructField("ResolutionDepth", ShortType, nullable = false),
StructField("FlashMajor", ShortType, nullable = false),
StructField("FlashMinor", ShortType, nullable = false),
StructField("FlashMinor2", StringType, nullable = false),
StructField("NetMajor", ShortType, nullable = false),
StructField("NetMinor", ShortType, nullable = false),
StructField("UserAgentMajor", ShortType, nullable = false),
StructField("UserAgentMinor", StringType, nullable = false),
StructField("CookieEnable", ShortType, nullable = false),
StructField("JavascriptEnable", ShortType, nullable = false),
StructField("IsMobile", ShortType, nullable = false),
StructField("MobilePhone", ShortType, nullable = false),
StructField("MobilePhoneModel", StringType, nullable = false),
StructField("Params", StringType, nullable = false),
StructField("IPNetworkID", IntegerType, nullable = false),
StructField("TraficSourceID", ShortType, nullable = false),
StructField("SearchEngineID", ShortType, nullable = false),
StructField("SearchPhrase", StringType, nullable = false),
StructField("AdvEngineID", ShortType, nullable = false),
StructField("IsArtifical", ShortType, nullable = false),
StructField("WindowClientWidth", ShortType, nullable = false),
StructField("WindowClientHeight", ShortType, nullable = false),
StructField("ClientTimeZone", ShortType, nullable = false),
StructField("ClientEventTime", TimestampType, nullable = false),
StructField("SilverlightVersion1", ShortType, nullable = false),
StructField("SilverlightVersion2", ShortType, nullable = false),
StructField("SilverlightVersion3", IntegerType, nullable = false),
StructField("SilverlightVersion4", ShortType, nullable = false),
StructField("PageCharset", StringType, nullable = false),
StructField("CodeVersion", IntegerType, nullable = false),
StructField("IsLink", ShortType, nullable = false),
StructField("IsDownload", ShortType, nullable = false),
StructField("IsNotBounce", ShortType, nullable = false),
StructField("FUniqID", LongType, nullable = false),
StructField("OriginalURL", StringType, nullable = false),
StructField("HID", IntegerType, nullable = false),
StructField("IsOldCounter", ShortType, nullable = false),
StructField("IsEvent", ShortType, nullable = false),
StructField("IsParameter", ShortType, nullable = false),
StructField("DontCountHits", ShortType, nullable = false),
StructField("WithHash", ShortType, nullable = false),
StructField("HitColor", StringType, nullable = false),
StructField("LocalEventTime", TimestampType, nullable = false),
StructField("Age", ShortType, nullable = false),
StructField("Sex", ShortType, nullable = false),
StructField("Income", ShortType, nullable = false),
StructField("Interests", ShortType, nullable = false),
StructField("Robotness", ShortType, nullable = false),
StructField("RemoteIP", IntegerType, nullable = false),
StructField("WindowName", IntegerType, nullable = false),
StructField("OpenerName", IntegerType, nullable = false),
StructField("HistoryLength", ShortType, nullable = false),
StructField("BrowserLanguage", StringType, nullable = false),
StructField("BrowserCountry", StringType, nullable = false),
StructField("SocialNetwork", StringType, nullable = false),
StructField("SocialAction", StringType, nullable = false),
StructField("HTTPError", ShortType, nullable = false),
StructField("SendTiming", IntegerType, nullable = false),
StructField("DNSTiming", IntegerType, nullable = false),
StructField("ConnectTiming", IntegerType, nullable = false),
StructField("ResponseStartTiming", IntegerType, nullable = false),
StructField("ResponseEndTiming", IntegerType, nullable = false),
StructField("FetchTiming", IntegerType, nullable = false),
StructField("SocialSourceNetworkID", ShortType, nullable = false),
StructField("SocialSourcePage", StringType, nullable = false),
StructField("ParamPrice", LongType, nullable = false),
StructField("ParamOrderID", StringType, nullable = false),
StructField("ParamCurrency", StringType, nullable = false),
StructField("ParamCurrencyID", ShortType, nullable = false),
StructField("OpenstatServiceName", StringType, nullable = false),
StructField("OpenstatCampaignID", StringType, nullable = false),
StructField("OpenstatAdID", StringType, nullable = false),
StructField("OpenstatSourceID", StringType, nullable = false),
StructField("UTMSource", StringType, nullable = false),
StructField("UTMMedium", StringType, nullable = false),
StructField("UTMCampaign", StringType, nullable = false),
StructField("UTMContent", StringType, nullable = false),
StructField("UTMTerm", StringType, nullable = false),
StructField("FromTag", StringType, nullable = false),
StructField("HasGCLID", ShortType, nullable = false),
StructField("RefererHash", LongType, nullable = false),
StructField("URLHash", LongType, nullable = false),
StructField("CLID", IntegerType, nullable = false))
)
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there is no way to create an index, right?

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Yes, no index support
https://spark.apache.org/docs/1.4.0/api/java/org/apache/spark/sql/types/StructField.html


val startTable = System.nanoTime()
val df = spark.read.schema(schema).option("header", "false").option("sep", "\t").csv("/hits.tsv")
df.createOrReplaceTempView("hits")
val endTable = System.nanoTime()
val timeElapsedTable = (endTable - startTable) / 1000000
writer.write(s"Creating table time: $timeElapsedTable ms")

val queries = Source.fromFile("queries.sql").getLines().toList
var itr: Int = 0
queries.foreach(query => {
val start = System.nanoTime()
val result = spark.sql(query)
val end = System.nanoTime()
val timeElapsed = (end - start) / 1000000
writer.write(s"Query $itr | Time: $timeElapsed ms")
itr += 1
})
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pls upload the results

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Uploaded in log.txt file


spark.stop()
System.exit(0)
78 changes: 78 additions & 0 deletions spark/benchmark.sh
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#!/bin/bash

sudo apt-get update
sudo apt-get -y install openjdk-8-jdk-headless

### If there is no HDFS and Spark on your system:

export HADOOP_DIR="/usr/local/hadoop"
export SPARK_DIR="/usr/local/spark"
export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"
export HADOOP_VERSION="3.3.6"
export SPARK_VERSION="3.5.0"


# export hadoop_file=hadoop-$HADOOP_VERSION.tar.gz
# export spark_file=spark-$SPARK_VERSION-bin-hadoop3.tgz
# wget --continue https://downloads.apache.org/hadoop/common/hadoop-$HADOOP_VERSION/$hadoop_file
# wget --continue https://downloads.apache.org/spark/spark-$SPARK_VERSION/$spark_file
# sudo tar -xzf $hadoop_file $spark_file
# sudo rm -f $spark_file $hadoop_file
# sudo rm -rf $HADOOP_DIR $SPARK_DIR
# sudo mv spark-$SPARK_VERSION spark
# sudo mv spark $SPARK_DIR
# sudo mv hadoop-$HADOOP_VERSION hadoop
# sudo mv hadoop $HADOOP_DIR

# echo "export HADOOP_HOME=$HADOOP_DIR" >> ~/.bashrc
# echo "export SPARK_HOME=$SPARK_DIR" >> ~/.bashrc
# echo "export PATH=$SPARK_HOME/bin:$SPARK_HOME/sbin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH" >> ~/.bashrc
# source ~/.bashrc

### To configure HDFS:

#cd $HADOOP_HOME/etc/hadoop
#cp core-site.xml core-site.xml.bak
#cp hdfs-site.xml hdfs-site.xml.bak
# echo "<configuration>
# <property>
# <name>fs.defaultFS</name>
# <value>hdfs://localhost:9000</value>
# </property>
# </configuration>" > core-site.xml
# echo "<configuration>
# <property>
# <name>dfs.replication</name>
# <value>1</value>
# </property>
# </configuration>" > hdfs-site.xml
# echo "export JAVA_HOME=$JAVA_HOME" >> hadoop-env.sh

### To configure Spark:

# cd $SPARK_HOME/conf
# cp spark-env.sh.template spark-env.sh
# echo "export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop" >> spark-env.sh
# echo "export SPARK_MASTER_HOST=localhost" >> spark-env.sh

### To run passless connection on localhost:

# ssh-keygen -t rsa
# cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
# chmod og-wx ~/.ssh/authorized_keys

### To run Spark and HDFS:

# cd $SPARK_HOME/sbin
# ./start-master.sh
# ./start-slave.sh spark://localhost:7077
# cd $HADOOP_HOME/sbin
# hdfs namenode -format
# ./start-dfs.sh

wget --continue 'https://datasets.clickhouse.com/hits_compatible/hits.tsv.gz'
gzip -d hits.tsv.gz
chmod 777 ~ hits.tsv
hdfs dfs -put hits.tsv /

$SPARK_HOME/bin/spark-shell --master local -i ClickBenchRunner.scala
44 changes: 44 additions & 0 deletions spark/log.txt
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Creating table time: 236 ms
Query 0 | Time: 18325 ms
Query 1 | Time: 414 ms
Query 2 | Time: 378 ms
Query 3 | Time: 240 ms
Query 4 | Time: 2384 ms
Query 5 | Time: 1577 ms
Query 6 | Time: 246 ms
Query 7 | Time: 988 ms
Query 8 | Time: 2020 ms
Query 9 | Time: 2689 ms
Query 10 | Time: 3097 ms
Query 11 | Time: 2011 ms
Query 12 | Time: 950 ms
Query 13 | Time: 1424 ms
Query 14 | Time: 715 ms
Query 15 | Time: 832 ms
Query 16 | Time: 849 ms
Query 17 | Time: 773 ms
Query 18 | Time: 1053 ms
Query 19 | Time: 143 ms
Query 20 | Time: 149 ms
Query 21 | Time: 854 ms
Query 22 | Time: 1877 ms
Query 23 | Time: 554 ms
Query 24 | Time: 216 ms
Query 25 | Time: 154 ms
Query 26 | Time: 161 ms
Query 27 | Time: 1060 ms
Query 28 | Time: 992 ms
Query 29 | Time: 642 ms
Query 30 | Time: 1096 ms
Query 31 | Time: 981 ms
Query 32 | Time: 1099 ms
Query 33 | Time: 1055 ms
Query 34 | Time: 822 ms
Query 35 | Time: 692 ms
Query 36 | Time: 929 ms
Query 37 | Time: 855 ms
Query 38 | Time: 790 ms
Query 39 | Time: 800 ms
Query 40 | Time: 704 ms
Query 41 | Time: 814 ms
Query 42 | Time: 923 ms
43 changes: 43 additions & 0 deletions spark/queries.sql
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SELECT COUNT(*) FROM hits;
SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
SELECT AVG(UserID) FROM hits;
SELECT COUNT(DISTINCT UserID) FROM hits;
SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
SELECT MIN(EventDate), MAX(EventDate) FROM hits;
SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
SELECT UserID FROM hits WHERE UserID = 435090932899640449;
SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10;
SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10;
SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10;
SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10;
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Here, the OFFSET clause was removed, which is incorrect.

It should be either LIMIT 1010 to get the closest result or subqueries with ROW_NUMBER.