MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/29/01 through 01/04/02
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 2,701 127,116
MED90 661 7,030
MED85 523 2,819
MED80 458 1,157
MED75 428 769
MED66 428 475
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 162 8,403
2-4 a.m. 128 557
4-6 a.m. 40 4,540
6-8 a.m. 100 2,904
8-10 a.m. 312 11,778
10-12 a.m. 635 16,616
12-2 p.m. 880 18,473
2-4 p.m. 1,076 24,352
4-6 p.m. 724 17,360
6-8 p.m. 389 8,132
8-10 p.m. 389 15,067
10-12 p.m. 364 11,184
__________ _____________ _________________
Total: 5,199 139,366
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 56
Davis 73
Irvine 27
Los Angeles 326
Riverside 21
San Diego 276
San Francisco 371
Santa Barbara 0
Santa Cruz 0
Lawrence Berkeley 6
Lawrence Livermore 0
Los Alamos 0
MELWEB 2,600
Searchlight 1,354
Other - UC 6
Other-Network UC 83
_____
5,199
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 418
Davis 564
Irvine 167
Los Angeles 3,911
Riverside 10
San Diego 208
San Francisco 3,536
Santa Barbara 0
Santa Cruz 0
Lawrence Berkeley 2
Lawrence Livermore 0
Los Alamos 0
MELWEB 129,946
Searchlight 0
Other - UC 8
Other-Network UC 596
_____
139,366
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.4
Standard deviation in seconds 1.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.1
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 0:09
Average session length (minutes:seconds) 10:09
Longest session recorded (minutes:seconds) 151:17
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 1297.1
Retrievals per search - standard deviation 14797
Percent of searches completed with 0 results 36.4%
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 5,199 14.0%
PRESENT 28,691 77.5%
INIT or CLOSE 3,116 8.4%
OTHER 11 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 215 3.3% 70 32.6% 2 210.6 1468.3
PERSONAL AUTHOR 2,027 31.2% 512 25.3% 6 94.7 697.0
TITLE WORD 486 7.5% 128 26.3% 2 60.4 245.4
SUBSET 3 0.0% 0 0.0% 1,791 8221.3 11137.7
SUBJECT WORD 5 0.1% 4 80.0% 1 1.0 0.0
SUBJECT 20 0.3% 17 85.0% 24 28.3 23.8
EXACT SUBJECT 68 1.0% 14 20.6% 16 404.9 1351.0
MAJOR SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
EXACT MAJOR SUBJ 12 0.2% 0 0.0% 18 15.9 10.4
EXACT TITLE 19 0.3% 8 42.1% 1 65.0 211.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 26 0.4% 10 38.5% 878 3106.6 4850.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 3,095 47.7% 1,370 44.3% 20 3768.7 25497.7
DATE 327 5.0% 83 25.4% 5 92.5 431.8
LANGUAGE 65 1.0% 10 15.4% 29 252.1 577.5
UNIQUE ID 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PUB TYPE 56 0.9% 8 14.3% 36 85.5 131.1
AUTHOR AFFIL. 36 0.6% 15 41.7% 36 44.0 39.9
CHEMICAL NAME 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 29 0.4% 2 6.9% 30 148.9 218.2
AGE 0 0.0% 0 0.0% 0 0.0 0.0
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 1 0.0% 0 0.0% 66 66.0 0.0
XXS 0 0.0% 0 0.0% 0 0.0 0.0
XMXS 0 0.0% 0 0.0% 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 0 0.0% 0 0.0% 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 1,078 20.7% 305 28.3% 4 106.7 883.3
Single 4,121 79.3% 1,589 38.6% 16 2630.8 21118.4
PRESENT commands, by type:
MARC 39.1%
OPAC 19.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS