MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/02/01 through 06/08/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 46,786 2,428,011
MED90 10,596 168,576
MED85 8,329 64,523
MED80 7,426 29,535
MED75 6,980 26,912
MED66 7,098 22,168
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,489 90,108
2-4 a.m. 863 33,522
4-6 a.m. 337 9,718
6-8 a.m. 1,404 47,376
8-10 a.m. 6,610 188,789
10-12 a.m. 13,936 437,564
12-2 p.m. 13,878 484,426
2-4 p.m. 17,200 572,949
4-6 p.m. 14,666 446,588
6-8 p.m. 6,683 200,045
8-10 p.m. 5,288 143,651
10-12 p.m. 3,861 84,989
__________ _____________ _________________
Total: 87,215 2,739,725
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 329
Davis 414
Irvine 134
Los Angeles 1,061
Riverside 22
San Diego 573
San Francisco 965
Santa Barbara 13
Santa Cruz 41
Lawrence Berkeley 65
Lawrence Livermore 29
Los Alamos 1
MELWEB 67,812
Searchlight 15,477
Other - UC 26
Other-Network UC 253
_____
87,215
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 1,954
Davis 4,119
Irvine 2,131
Los Angeles 16,844
Riverside 156
San Diego 5,657
San Francisco 7,948
Santa Barbara 60
Santa Cruz 501
Lawrence Berkeley 380
Lawrence Livermore 393
Los Alamos 10
MELWEB 2,618,044
Searchlight 78,213
Other - UC 178
Other-Network UC 3,137
_____
2,739,725
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 3.0
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) 20:42
Average session length (minutes:seconds) 16:38
Longest session recorded (minutes:seconds) 213:20
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 326.7
Retrievals per search - standard deviation 4105.0
Percent of searches completed with 0 results 36.6%
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 87,215 14.4%
PRESENT 475,950 78.7%
INIT or CLOSE 40,705 6.7%
OTHER 822 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 5,081 4.3% 2,184 43.0% 5 884.0 3749.2
PERSONAL AUTHOR 23,790 20.0% 6,959 29.3% 7 108.5 2764.3
TITLE WORD 10,084 8.5% 4,155 41.2% 3 208.2 2382.6
SUBSET 143 0.1% 40 28.0% 24 252.7 1303.6
SUBJECT WORD 126 0.1% 67 53.2% 11 263.3 580.3
SUBJECT 2,116 1.8% 1,090 51.5% 13 429.4 3289.0
EXACT SUBJECT 4,279 3.6% 1,207 28.2% 33 565.7 3709.6
MAJOR SUBJECT 231 0.2% 129 55.8% 16 243.6 751.0
EXACT MAJOR SUBJ 338 0.3% 73 21.6% 18 164.7 488.3
EXACT TITLE 1,177 1.0% 742 63.0% 1 27.9 197.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 946 0.8% 231 24.4% 390 1729.4 3396.9
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 38 0.0% 15 39.5% 7 57.1 102.5
KEYWORD 53,398 44.9% 20,737 38.8% 16 648.9 6410.0
DATE 1,651 1.4% 411 24.9% 8 135.3 1844.8
LANGUAGE 6,059 5.1% 1,800 29.7% 25 429.2 2719.1
UNIQUE ID 151 0.1% 73 48.3% 1 1.0 0.0
ADDED 1,069 0.9% 631 59.0% 5 20.3 41.8
PUB TYPE 2,711 2.3% 692 25.5% 23 185.4 730.7
AUTHOR AFFIL. 486 0.4% 188 38.7% 13 30.9 57.7
CHEMICAL NAME 19 0.0% 11 57.9% 9 32.3 55.4
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 4,631 3.9% 1,671 36.1% 20 661.7 3972.7
AGE 197 0.2% 56 28.4% 41 133.2 277.2
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 107 0.1% 34 31.8% 28 638.5 3704.7
XXS 124 0.1% 64 51.6% 6 107.4 348.1
XMXS 54 0.0% 24 44.4% 3 13.9 17.5
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 42 0.0% 38 90.5% 2 1.8 0.5
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 22,052 25.3% 7,949 36.0% 7 296.7 3704.8
Single 65,163 74.7% 24,006 36.8% 14 590.6 5554.6
PRESENT commands, by type:
MARC 28.3%
OPAC 30.1%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS