{"id":"https://openalex.org/W2146732261","doi":"https://doi.org/10.1109/icde.2010.5447850","title":"Q-Cop: Avoiding bad query mixes to minimize client timeouts under heavy loads","display_name":"Q-Cop: Avoiding bad query mixes to minimize client timeouts under heavy loads","publication_year":2010,"publication_date":"2010-01-01","ids":{"openalex":"https://openalex.org/W2146732261","doi":"https://doi.org/10.1109/icde.2010.5447850","mag":"2146732261"},"language":"en","primary_location":{"id":"doi:10.1109/icde.2010.5447850","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icde.2010.5447850","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2010 IEEE 26th International Conference on Data Engineering (ICDE 2010)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5017400875","display_name":"Sean Tozer","orcid":null},"institutions":[{"id":"https://openalex.org/I151746483","display_name":"University of Waterloo","ror":"https://ror.org/01aff2v68","country_code":"CA","type":"education","lineage":["https://openalex.org/I151746483"]}],"countries":["CA"],"is_corresponding":true,"raw_author_name":"Sean Tozer","raw_affiliation_strings":["David R. Cheriton School of Computer Science, University of Waterloo, Waterloo, ONT, Canada","[David R. Cheriton School of Computer Science, University of Waterloo, Ontario, Canada]"],"affiliations":[{"raw_affiliation_string":"David R. Cheriton School of Computer Science, University of Waterloo, Waterloo, ONT, Canada","institution_ids":["https://openalex.org/I151746483"]},{"raw_affiliation_string":"[David R. Cheriton School of Computer Science, University of Waterloo, Ontario, Canada]","institution_ids":["https://openalex.org/I151746483"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5028554006","display_name":"Tim Brecht","orcid":null},"institutions":[{"id":"https://openalex.org/I151746483","display_name":"University of Waterloo","ror":"https://ror.org/01aff2v68","country_code":"CA","type":"education","lineage":["https://openalex.org/I151746483"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Tim Brecht","raw_affiliation_strings":["David R. Cheriton School of Computer Science, University of Waterloo, Waterloo, ONT, Canada","[David R. Cheriton School of Computer Science, University of Waterloo, Ontario, Canada]"],"affiliations":[{"raw_affiliation_string":"David R. Cheriton School of Computer Science, University of Waterloo, Waterloo, ONT, Canada","institution_ids":["https://openalex.org/I151746483"]},{"raw_affiliation_string":"[David R. Cheriton School of Computer Science, University of Waterloo, Ontario, Canada]","institution_ids":["https://openalex.org/I151746483"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5000416532","display_name":"Ashraf Aboulnaga","orcid":"https://orcid.org/0000-0001-6693-7099"},"institutions":[{"id":"https://openalex.org/I151746483","display_name":"University of Waterloo","ror":"https://ror.org/01aff2v68","country_code":"CA","type":"education","lineage":["https://openalex.org/I151746483"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Ashraf Aboulnaga","raw_affiliation_strings":["David R. Cheriton School of Computer Science, University of Waterloo, Waterloo, ONT, Canada","[David R. Cheriton School of Computer Science, University of Waterloo, Ontario, Canada]"],"affiliations":[{"raw_affiliation_string":"David R. Cheriton School of Computer Science, University of Waterloo, Waterloo, ONT, Canada","institution_ids":["https://openalex.org/I151746483"]},{"raw_affiliation_string":"[David R. Cheriton School of Computer Science, University of Waterloo, Ontario, Canada]","institution_ids":["https://openalex.org/I151746483"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5017400875"],"corresponding_institution_ids":["https://openalex.org/I151746483"],"apc_list":null,"apc_paid":null,"fwci":16.4256,"has_fulltext":false,"cited_by_count":62,"citation_normalized_percentile":{"value":0.98892127,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":94,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"397","last_page":"408"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10101","display_name":"Cloud Computing and Resource Management","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10101","display_name":"Cloud Computing and Resource Management","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10772","display_name":"Distributed systems and fault tolerance","score":0.9980999827384949,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10715","display_name":"Distributed and Parallel Computing Systems","score":0.9951000213623047,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8738387823104858},{"id":"https://openalex.org/keywords/control","display_name":"Control (management)","score":0.5893201231956482},{"id":"https://openalex.org/keywords/execution-time","display_name":"Execution time","score":0.5886762142181396},{"id":"https://openalex.org/keywords/response-time","display_name":"Response time","score":0.5460820198059082},{"id":"https://openalex.org/keywords/range","display_name":"Range (aeronautics)","score":0.5190644860267639},{"id":"https://openalex.org/keywords/throughput","display_name":"Throughput","score":0.5151554346084595},{"id":"https://openalex.org/keywords/admission-control","display_name":"Admission control","score":0.4653385877609253},{"id":"https://openalex.org/keywords/database","display_name":"Database","score":0.44060981273651123},{"id":"https://openalex.org/keywords/distributed-computing","display_name":"Distributed computing","score":0.3476712107658386},{"id":"https://openalex.org/keywords/operating-system","display_name":"Operating system","score":0.2196139097213745},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.1963234543800354},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.07863879203796387},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.06611311435699463}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8738387823104858},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.5893201231956482},{"id":"https://openalex.org/C2989134064","wikidata":"https://www.wikidata.org/wiki/Q288510","display_name":"Execution time","level":2,"score":0.5886762142181396},{"id":"https://openalex.org/C19012869","wikidata":"https://www.wikidata.org/wiki/Q578372","display_name":"Response time","level":2,"score":0.5460820198059082},{"id":"https://openalex.org/C204323151","wikidata":"https://www.wikidata.org/wiki/Q905424","display_name":"Range (aeronautics)","level":2,"score":0.5190644860267639},{"id":"https://openalex.org/C157764524","wikidata":"https://www.wikidata.org/wiki/Q1383412","display_name":"Throughput","level":3,"score":0.5151554346084595},{"id":"https://openalex.org/C2778234956","wikidata":"https://www.wikidata.org/wiki/Q4683813","display_name":"Admission control","level":3,"score":0.4653385877609253},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.44060981273651123},{"id":"https://openalex.org/C120314980","wikidata":"https://www.wikidata.org/wiki/Q180634","display_name":"Distributed computing","level":1,"score":0.3476712107658386},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.2196139097213745},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.1963234543800354},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.07863879203796387},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.06611311435699463},{"id":"https://openalex.org/C5119721","wikidata":"https://www.wikidata.org/wiki/Q220501","display_name":"Quality of service","level":2,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1109/icde.2010.5447850","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icde.2010.5447850","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2010 IEEE 26th International Conference on Data Engineering (ICDE 2010)","raw_type":"proceedings-article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.157.2331","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.157.2331","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.cs.uwaterloo.ca/~ashraf/pubs/icde10qcop.pdf","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.215.1781","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.215.1781","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://cs.uwaterloo.ca/~brecht/papers/getpaper.php?file=icde-2010.pdf","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.584.188","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.584.188","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"https://cs.uwaterloo.ca/~brecht/papers/getpaper.php?file=icde-2010.pdf","raw_type":"text"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/16","score":0.5199999809265137,"display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":36,"referenced_works":["https://openalex.org/W3849000","https://openalex.org/W10242039","https://openalex.org/W78537038","https://openalex.org/W1511843856","https://openalex.org/W1570160575","https://openalex.org/W1570448133","https://openalex.org/W1572571795","https://openalex.org/W1977291588","https://openalex.org/W1987362912","https://openalex.org/W2066660519","https://openalex.org/W2081509108","https://openalex.org/W2100773341","https://openalex.org/W2105551310","https://openalex.org/W2109480140","https://openalex.org/W2110582196","https://openalex.org/W2112474496","https://openalex.org/W2116030291","https://openalex.org/W2121324617","https://openalex.org/W2127082645","https://openalex.org/W2129578979","https://openalex.org/W2131024349","https://openalex.org/W2132145609","https://openalex.org/W2157782847","https://openalex.org/W2165559771","https://openalex.org/W2597566326","https://openalex.org/W3137161744","https://openalex.org/W4230663576","https://openalex.org/W6600152633","https://openalex.org/W6600423610","https://openalex.org/W6603177645","https://openalex.org/W6634094483","https://openalex.org/W6634102093","https://openalex.org/W6667320511","https://openalex.org/W6670667571","https://openalex.org/W6679275292","https://openalex.org/W6684560041"],"related_works":["https://openalex.org/W2067532427","https://openalex.org/W2136583354","https://openalex.org/W2111238207","https://openalex.org/W1979093605","https://openalex.org/W2760721665","https://openalex.org/W2107954672","https://openalex.org/W330130819","https://openalex.org/W1496327843","https://openalex.org/W1572184288","https://openalex.org/W2383649123"],"abstract_inverted_index":{"In":[0],"three-tiered":[1,145],"web":[2],"applications,":[3],"some":[4],"form":[5],"of":[6,24,42,50,58,92,95,106,114,125,135,175,183,188],"admission":[7,35,149],"control":[8,36,150],"is":[9],"required":[10],"to":[11,147,165],"ensure":[12],"that":[13,38,88,117,130,155,177],"throughput":[14],"and":[15,62,139,167],"response":[16,90],"times":[17,91,129],"are":[18,118,192],"not":[19,101],"significantly":[20,99,171],"harmed":[21],"during":[22],"periods":[23],"heavy":[25],"load.":[26],"We":[27,121],"propose":[28],"Q-Cop,":[29],"a":[30,40,66,71,123,144,169],"prototype":[31],"system":[32,146],"for":[33,70,132],"improving":[34],"decisions":[37,161],"considers":[39],"combination":[41],"the":[43,46,48,55,63,89,104,112,133,173,181,195],"load":[44],"on":[45,103,111],"system,":[47],"number":[49,105,174],"simultaneous":[51],"queries":[52,59,96,107,116,136,164],"being":[53,60,108,137],"executed,":[54,61],"actual":[56],"mix":[57,113,134],"expected":[64,126],"time":[65,81,178],"user":[67],"may":[68],"wait":[69],"reply":[72],"before":[73],"they":[74],"or":[75],"their":[76],"browser":[77],"give":[78],"up":[79],"(i.e.,":[80],"out).":[82],"Using":[83],"TPC-W":[84],"queries,":[85],"we":[86],"show":[87,154],"different":[93],"types":[94],"can":[97],"vary":[98],"depending":[100],"just":[102],"processed":[109],"but":[110],"other":[115],"running":[119],"simultaneously.":[120],"develop":[122],"model":[124,142],"query":[127],"execution":[128],"accounts":[131],"executed":[138],"integrate":[140],"this":[141,156],"into":[143],"make":[148],"decisions.":[151],"Our":[152],"results":[153],"approach":[157],"makes":[158],"more":[159],"informed":[160],"about":[162],"which":[163],"reject":[166],"as":[168],"result":[170],"reduces":[172],"requests":[176,191],"out.":[179],"Across":[180],"range":[182],"workloads":[184],"examined":[185],"an":[186],"average":[187],"47%":[189],"fewer":[190],"unsuccessful":[193],"than":[194],"next":[196],"best":[197],"approach.":[198]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":4},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":6},{"year":2019,"cited_by_count":5},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":3},{"year":2015,"cited_by_count":3},{"year":2014,"cited_by_count":5},{"year":2013,"cited_by_count":11},{"year":2012,"cited_by_count":3}],"updated_date":"2026-04-05T17:49:38.594831","created_date":"2025-10-10T00:00:00"}
