MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/17/01 through 11/23/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 25,163 1,238,685
MED90 5,666 78,921
MED85 4,687 32,656
MED80 4,271 14,926
MED75 4,108 7,508
MED66 4,206 14,978
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,453 23,905
2-4 a.m. 380 17,166
4-6 a.m. 285 5,372
6-8 a.m. 503 13,388
8-10 a.m. 2,961 95,929
10-12 a.m. 7,192 206,920
12-2 p.m. 9,174 230,560
2-4 p.m. 9,836 301,964
4-6 p.m. 7,984 243,267
6-8 p.m. 3,569 102,506
8-10 p.m. 2,618 70,060
10-12 p.m. 2,146 76,637
__________ _____________ _________________
Total: 48,101 1,387,674
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 475
Davis 362
Irvine 66
Los Angeles 689
Riverside 3
San Diego 435
San Francisco 549
Santa Barbara 21
Santa Cruz 43
Lawrence Berkeley 3
Lawrence Livermore 17
Los Alamos 0
MELWEB 0
Searchlight 10,840
Other - UC 34,403
Other-Network UC 195
_____
48,101
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,362
Davis 3,551
Irvine 715
Los Angeles 2,584
Riverside 1
San Diego 3,747
San Francisco 11,382
Santa Barbara 117
Santa Cruz 427
Lawrence Berkeley 11
Lawrence Livermore 432
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 1,359,865
Other-Network UC 1,480
_____
1,387,674
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 5.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 5:30
Average session length (minutes:seconds) 13:57
Longest session recorded (minutes:seconds) 207:47
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 478.0
Retrievals per search - standard deviation 6925.8
Percent of searches completed with 0 results 36.9%
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 48,101 15.2%
PRESENT 244,585 77.3%
INIT or CLOSE 23,562 7.4%
OTHER 122 0.0%
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 2,601 4.0% 1,041 40.0% 4 1031.3 5764.1
PERSONAL AUTHOR 12,450 19.1% 3,361 27.0% 7 75.2 527.1
TITLE WORD 5,611 8.6% 2,322 41.4% 3 167.5 1804.3
SUBSET 65 0.1% 17 26.2% 45 412.4 1613.5
SUBJECT WORD 90 0.1% 36 40.0% 42 1651.8 9632.2
SUBJECT 1,030 1.6% 574 55.7% 19 723.6 3008.7
EXACT SUBJECT 2,547 3.9% 781 30.7% 33 453.3 3260.0
MAJOR SUBJECT 54 0.1% 23 42.6% 13 980.5 5172.4
EXACT MAJOR SUBJ 150 0.2% 25 16.7% 43 775.4 2933.9
EXACT TITLE 594 0.9% 350 58.9% 1 15.1 97.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 525 0.8% 144 27.4% 448 1980.6 3840.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 15 0.0% 12 80.0% 2 206.3 354.8
KEYWORD 30,481 46.7% 12,037 39.5% 19 1000.8 10877.4
DATE 1,094 1.7% 208 19.0% 5 90.1 573.6
LANGUAGE 3,301 5.1% 982 29.7% 33 358.1 1701.6
UNIQUE ID 55 0.1% 38 69.1% 1 1.0 0.0
ADDED 138 0.2% 126 91.3% 224 14917.6 36340.0
PUB TYPE 1,826 2.8% 537 29.4% 27 120.9 503.5
AUTHOR AFFIL. 335 0.5% 157 46.9% 16 54.5 176.2
CHEMICAL NAME 6 0.0% 3 50.0% 122 597.0 925.9
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,147 3.3% 626 29.2% 30 1072.5 7055.8
AGE 100 0.2% 24 24.0% 45 188.9 507.5
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 27 0.0% 4 14.8% 155 1779.7 4671.8
XXS 58 0.1% 36 62.1% 166 163.0 131.7
XMXS 13 0.0% 7 53.8% 49 81.3 69.3
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 21 0.0% 16 76.2% 3 188.4 404.6
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 11,273 23.4% 3,885 34.5% 8 320.2 3329.1
Single 36,828 76.6% 13,872 37.7% 15 898.6 9827.6
PRESENT commands, by type:
MARC 30.8%
OPAC 25.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS