MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/15/01 through 12/21/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 14,413 845,054
MED90 2,824 58,052
MED85 2,097 26,285
MED80 1,734 13,928
MED75 1,576 7,099
MED66 1,603 9,045
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 282 19,853
2-4 a.m. 101 4,160
4-6 a.m. 95 6,319
6-8 a.m. 244 17,478
8-10 a.m. 1,743 71,759
10-12 a.m. 4,438 147,242
12-2 p.m. 4,437 181,635
2-4 p.m. 6,118 222,438
4-6 p.m. 3,598 152,769
6-8 p.m. 1,589 59,132
8-10 p.m. 753 37,776
10-12 p.m. 849 38,902
__________ _____________ _________________
Total: 24,247 959,463
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 92
Davis 334
Irvine 413
Los Angeles 430
Riverside 78
San Diego 501
San Francisco 426
Santa Barbara 1
Santa Cruz 7
Lawrence Berkeley 10
Lawrence Livermore 8
Los Alamos 0
MELWEB 0
Searchlight 1,780
Other - UC 20,066
Other-Network UC 101
_____
24,247
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 797
Davis 5,020
Irvine 657
Los Angeles 9,309
Riverside 473
San Diego 3,546
San Francisco 4,610
Santa Barbara 1
Santa Cruz 108
Lawrence Berkeley 315
Lawrence Livermore 98
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 933,643
Other-Network UC 886
_____
959,463
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 1.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.2
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:31
Average session length (minutes:seconds) 19:53
Longest session recorded (minutes:seconds) 182:11
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 391.5
Retrievals per search - standard deviation 4407.5
Percent of searches completed with 0 results 32.3%
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 24,247 12.0%
PRESENT 168,109 83.0%
INIT or CLOSE 10,107 5.0%
OTHER 120 0.1%
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 1,985 6.1% 727 36.6% 4 984.0 6538.3
PERSONAL AUTHOR 10,076 30.7% 2,866 28.4% 6 108.9 1123.3
TITLE WORD 2,948 9.0% 1,095 37.1% 3 119.1 895.6
SUBSET 22 0.1% 2 9.1% 39 2054.3 5887.9
SUBJECT WORD 107 0.3% 57 53.3% 6 363.9 1825.2
SUBJECT 372 1.1% 207 55.6% 11 390.1 2387.6
EXACT SUBJECT 703 2.1% 191 27.2% 21 406.6 2046.3
MAJOR SUBJECT 16 0.0% 5 31.3% 10 76.8 159.5
EXACT MAJOR SUBJ 55 0.2% 16 29.1% 18 122.3 279.5
EXACT TITLE 285 0.9% 161 56.5% 1 6.4 37.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 371 1.1% 90 24.3% 317 2203.7 4732.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 7 0.0% 6 85.7% 1 1.0 0.0
KEYWORD 11,759 35.9% 4,126 35.1% 18 878.5 7245.0
DATE 923 2.8% 205 22.2% 6 168.4 1899.9
LANGUAGE 1,019 3.1% 242 23.7% 22 376.3 1888.4
UNIQUE ID 369 1.1% 67 18.2% 1 1.0 0.3
ADDED 3 0.0% 3 100% 0 0.0 0.0
PUB TYPE 615 1.9% 100 16.3% 25 271.0 1408.3
AUTHOR AFFIL. 261 0.8% 119 45.6% 9 38.7 246.1
CHEMICAL NAME 2 0.0% 2 100% 0 0.0 0.0
EXACT CHEMICAL 2 0.0% 1 50.0% 45 45.0 0.0
AT 844 2.6% 260 30.8% 18 1481.9 8805.8
AGE 15 0.0% 1 6.7% 40 140.2 286.5
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 14 0.0% 1 7.1% 388 4242.8 11969.0
XXS 4 0.0% 1 25.0% 5 5.0 4.0
XMXS 1 0.0% 1 100% 0 0.0 0.0
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 12 0.0% 12 100% 0 0.0 0.0
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 6,547 27.0% 2,157 32.9% 5 320.3 3563.1
Single 17,700 73.0% 5,672 32.0% 15 672.3 5860.9
PRESENT commands, by type:
MARC 29.0%
OPAC 22.1%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS