MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/24/00 through 06/30/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 34,557 1,716,483
MED90 7,435 152,092
MED85 5,356 63,397
MED80 4,505 34,123
MED75 4,038 26,121
MED66 4,094 20,617
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,812 54,486
2-4 a.m. 703 23,816
4-6 a.m. 152 30,580
6-8 a.m. 873 27,265
8-10 a.m. 4,520 164,174
10-12 a.m. 10,986 347,787
12-2 p.m. 11,387 369,421
2-4 p.m. 12,427 426,756
4-6 p.m. 9,686 314,787
6-8 p.m. 3,952 137,745
8-10 p.m. 2,149 67,864
10-12 p.m. 1,338 48,152
__________ _____________ _________________
Total: 59,985 2,012,833
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 375
Davis 615
Irvine 253
Los Angeles 395
Riverside 11
San Diego 1,543
San Francisco 689
Santa Barbara 6
Santa Cruz 100
Lawrence Berkeley 107
Lawrence Livermore 12
Los Alamos 0
MELWEB 50,694
Searchlight 4,571
Other - UC 104
Other-Network UC 510
_____
59,985
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,527
Davis 6,039
Irvine 1,162
Los Angeles 4,606
Riverside 73
San Diego 15,870
San Francisco 7,407
Santa Barbara 70
Santa Cruz 994
Lawrence Berkeley 1,562
Lawrence Livermore 34
Los Alamos 0
MELWEB 1,897,643
Searchlight 67,021
Other - UC 1,854
Other-Network UC 5,971
_____
2,012,833
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 2.9
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 0.9
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:18
Average session length (minutes:seconds) 19:01
Longest session recorded (minutes:seconds) 231:55
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 394.0
Retrievals per search - standard deviation 5205.7
Percent of searches completed with 0 results 31.7%
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 59,985 13.2%
PRESENT 369,957 81.1%
INIT or CLOSE 25,858 5.7%
OTHER 242 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 4,088 4.9% 1,605 39.3% 4 802.7 3577.0
PERSONAL AUTHOR 20,651 24.6% 5,708 27.6% 7 75.3 543.9
TITLE WORD 7,120 8.5% 2,731 38.4% 3 143.1 1368.6
SUBSET 104 0.1% 24 23.1% 33 371.7 964.4
SUBJECT WORD 336 0.4% 130 38.7% 6 476.1 2058.5
SUBJECT 1,612 1.9% 704 43.7% 15 731.2 5842.8
EXACT SUBJECT 2,718 3.2% 668 24.6% 31 432.6 3172.4
MAJOR SUBJECT 131 0.2% 67 51.1% 10 618.5 3459.2
EXACT MAJOR SUBJ 246 0.3% 36 14.6% 16 281.2 1309.6
EXACT TITLE 568 0.7% 333 58.6% 1 23.7 277.4
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 973 1.2% 365 37.5% 163 1244.1 2677.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 1 0.0% 1 100% 0 0.0 0.0
KEYWORD 32,791 39.0% 10,746 32.8% 15 828.9 8359.7
DATE 1,723 2.0% 376 21.8% 5 121.3 896.9
LANGUAGE 3,968 4.7% 1,092 27.5% 28 536.6 3879.1
UNIQUE ID 435 0.5% 141 32.4% 1 1.0 0.1
ADDED 1,116 1.3% 550 49.3% 6 19.4 32.0
PUB TYPE 1,955 2.3% 518 26.5% 23 213.5 934.1
AUTHOR AFFIL. 536 0.6% 216 40.3% 8 91.0 537.1
CHEMICAL NAME 17 0.0% 17 100% 0 0.0 0.0
EXACT CHEMICAL 3 0.0% 3 100% 0 0.0 0.0
AT 2,488 3.0% 801 32.2% 20 671.5 3691.8
AGE 270 0.3% 92 34.1% 67 158.2 319.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 54 0.1% 19 35.2% 11 116.6 206.1
XXS 124 0.1% 53 42.7% 16 136.4 394.4
XMXS 56 0.1% 17 30.4% 18 879.1 4356.6
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 17 0.0% 14 82.4% 10 28.0 37.4
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 17,098 28.5% 5,815 34.0% 6 272.6 2726.3
Single 42,887 71.5% 13,187 30.7% 15 692.1 7191.3
PRESENT commands, by type:
MARC 32.8%
OPAC 29.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS