MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 04/01/00 through 04/30/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 181,988 9,832,885
MED90 39,143 784,884
MED85 29,420 296,692
MED80 25,801 152,128
MED75 23,661 100,007
MED66 23,959 116,401
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 8,137 275,086
2-4 a.m. 3,922 92,521
4-6 a.m. 776 31,070
6-8 a.m. 3,744 122,281
8-10 a.m. 22,319 778,803
10-12 a.m. 52,837 1,723,207
12-2 p.m. 56,488 1,986,669
2-4 p.m. 67,285 2,286,850
4-6 p.m. 51,610 1,850,827
6-8 p.m. 26,383 931,753
8-10 p.m. 17,475 676,303
10-12 p.m. 12,996 527,627
__________ _____________ _________________
Total: 323,972 11,282,997
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 3,174
Davis 2,364
Irvine 408
Los Angeles 2,186
Riverside 98
San Diego 3,126
San Francisco 4,934
Santa Barbara 77
Santa Cruz 80
Lawrence Berkeley 148
Lawrence Livermore 202
Los Alamos 0
MELWEB 290,737
Searchlight 13,773
Other - UC 152
Other-Network UC 2,513
_____
323,972
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 39,609
Davis 32,456
Irvine 1,990
Los Angeles 16,946
Riverside 450
San Diego 26,969
San Francisco 60,147
Santa Barbara 592
Santa Cruz 415
Lawrence Berkeley 1,444
Lawrence Livermore 1,804
Los Alamos 0
MELWEB 10,900,112
Searchlight 157,731
Other - UC 500
Other-Network UC 41,832
_____
11,282,997
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.6
Standard deviation in seconds 2.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.7
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:58
Average session length (minutes:seconds) 17:43
Longest session recorded (minutes:seconds) 424:04
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 493.6
Retrievals per search - standard deviation 6594.0
Percent of searches completed with 0 results 33.1%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 323,972 13.2%
PRESENT 1,986,883 80.8%
INIT or CLOSE 140,911 5.7%
OTHER 7,689 0.3%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 20,444 4.4% 8,146 39.8% 4 805.4 4289.4
PERSONAL AUTHOR 92,511 19.8% 25,478 27.5% 7 83.1 1183.6
TITLE WORD 29,983 6.4% 11,396 38.0% 4 169.7 1873.5
SUBSET 972 0.2% 263 27.1% 17 186.8 737.4
SUBJECT WORD 1,227 0.3% 619 50.4% 12 749.1 3415.2
SUBJECT 10,639 2.3% 5,462 51.3% 21 631.6 4089.8
EXACT SUBJECT 20,955 4.5% 5,581 26.6% 29 454.2 2906.6
MAJOR SUBJECT 794 0.2% 271 34.1% 11 255.4 1304.2
EXACT MAJOR SUBJ 2,071 0.4% 419 20.2% 27 325.1 1393.2
EXACT TITLE 2,906 0.6% 1,776 61.1% 1 20.3 252.7
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 5,206 1.1% 2,115 40.6% 195 1380.4 3146.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 34 0.0% 13 38.2% 27 163.5 560.4
KEYWORD 195498 41.8% 67,224 34.4% 18 1027.8 10233.4
DATE 7,920 1.7% 1,870 23.6% 7 155.0 2948.1
LANGUAGE 28,719 6.1% 8,130 28.3% 26 418.1 4116.9
UNIQUE ID 1,591 0.3% 366 23.0% 1 1.0 0.3
ADDED 4,801 1.0% 2,838 59.1% 6 67.4 1475.0
PUB TYPE 11,858 2.5% 3,121 26.3% 20 152.1 600.7
AUTHOR AFFIL. 3,011 0.6% 1,348 44.8% 9 112.2 1482.9
CHEMICAL NAME 39 0.0% 20 51.3% 46 289.0 464.4
EXACT CHEMICAL 9 0.0% 5 55.6% 104 82.3 48.6
AT 23,876 5.1% 7,373 30.9% 22 565.5 4064.7
AGE 1,018 0.2% 279 27.4% 23 167.6 510.5
ISN 4 0.0% 4 100% 0 0.0 0.0
ARTICLE 690 0.1% 150 21.7% 56 388.2 1304.3
XXS 885 0.2% 382 43.2% 16 975.0 13480.1
XMXS 307 0.1% 104 33.9% 14 232.7 1473.7
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 66 0.0% 51 77.3% 22 5080.5 19268.9
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 93,263 28.8% 31,889 34.2% 9 296.5 3393.9
Single 230,709 71.2% 75,321 32.6% 16 912.0 9260.0
PRESENT commands, by type:
MARC 32.6%
OPAC 28.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS