MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/09/01 through 06/15/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,550 2,216,625
MED90 7,626 134,538
MED85 5,791 53,724
MED80 5,038 24,191
MED75 4,729 15,995
MED66 4,865 16,874
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,638 39,749
2-4 a.m. 1,211 118,053
4-6 a.m. 268 34,200
6-8 a.m. 1,260 47,627
8-10 a.m. 5,227 213,636
10-12 a.m. 12,010 436,236
12-2 p.m. 11,537 397,973
2-4 p.m. 14,337 450,403
4-6 p.m. 10,386 369,730
6-8 p.m. 4,502 168,903
8-10 p.m. 3,055 110,690
10-12 p.m. 2,168 74,747
__________ _____________ _________________
Total: 67,599 2,461,947
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 359
Davis 897
Irvine 107
Los Angeles 300
Riverside 86
San Diego 486
San Francisco 1,178
Santa Barbara 3
Santa Cruz 15
Lawrence Berkeley 21
Lawrence Livermore 20
Los Alamos 17
MELWEB 54,923
Searchlight 8,738
Other - UC 32
Other-Network UC 417
_____
67,599
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 6,555
Davis 12,718
Irvine 822
Los Angeles 4,654
Riverside 279
San Diego 4,399
San Francisco 10,349
Santa Barbara 105
Santa Cruz 143
Lawrence Berkeley 95
Lawrence Livermore 116
Los Alamos 49
MELWEB 2,266,498
Searchlight 151,209
Other - UC 98
Other-Network UC 3,858
_____
2,461,947
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 2.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:17
Average session length (minutes:seconds) 18:47
Longest session recorded (minutes:seconds) 290:14
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 367.0
Retrievals per search - standard deviation 5542.4
Percent of searches completed with 0 results 33.6%
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 67,599 12.9%
PRESENT 427,927 81.4%
INIT or CLOSE 30,122 5.7%
OTHER 291 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 4,209 4.6% 1,609 38.2% 5 887.5 4258.7
PERSONAL AUTHOR 21,545 23.5% 6,094 28.3% 8 74.1 515.7
TITLE WORD 7,189 7.8% 2,805 39.0% 3 140.1 1618.2
SUBSET 133 0.1% 23 17.3% 14 120.0 434.3
SUBJECT WORD 68 0.1% 28 41.2% 19 3680.2 12862.5
SUBJECT 1,287 1.4% 666 51.7% 23 642.3 3044.1
EXACT SUBJECT 2,958 3.2% 651 22.0% 31 411.3 3457.6
MAJOR SUBJECT 254 0.3% 126 49.6% 6 593.0 2924.6
EXACT MAJOR SUBJ 304 0.3% 63 20.7% 15 156.3 471.1
EXACT TITLE 521 0.6% 283 54.3% 1 11.5 80.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,035 1.1% 289 27.9% 439 1756.5 3149.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 7 0.0% 6 85.7% 4 4.0 0.0
KEYWORD 39,433 43.0% 14,131 35.8% 15 732.8 8801.0
DATE 1,683 1.8% 424 25.2% 6 68.9 618.0
LANGUAGE 4,107 4.5% 1,106 26.9% 23 276.0 1668.4
UNIQUE ID 126 0.1% 51 40.5% 1 1.0 0.1
ADDED 1,076 1.2% 443 41.2% 6 34.8 313.0
PUB TYPE 1,954 2.1% 465 23.8% 24 174.0 642.4
AUTHOR AFFIL. 582 0.6% 260 44.7% 10 76.7 678.3
CHEMICAL NAME 2 0.0% 0 0.0% 22 22.0 28.3
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,696 2.9% 834 30.9% 16 283.5 1221.4
AGE 149 0.2% 36 24.2% 17 141.9 511.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 68 0.1% 18 26.5% 46 325.5 684.9
XXS 126 0.1% 50 39.7% 28 2419.9 17184.0
XMXS 92 0.1% 39 42.4% 17 40.7 54.8
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 23 0.0% 23 100% 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 17,512 25.9% 5,883 33.6% 7 166.2 1776.1
Single 50,087 74.1% 16,864 33.7% 15 688.6 7822.3
PRESENT commands, by type:
MARC 26.8%
OPAC 32.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS