MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/08/01 through 12/14/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 20,710 1,033,813
MED90 4,167 72,433
MED85 3,364 29,412
MED80 2,937 14,316
MED75 2,727 7,162
MED66 2,766 11,646
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 722 23,416
2-4 a.m. 213 8,164
4-6 a.m. 71 5,465
6-8 a.m. 407 22,469
8-10 a.m. 2,834 93,045
10-12 a.m. 6,128 190,245
12-2 p.m. 6,058 195,945
2-4 p.m. 8,180 220,917
4-6 p.m. 5,862 194,678
6-8 p.m. 2,914 91,735
8-10 p.m. 1,865 69,939
10-12 p.m. 1,417 52,764
__________ _____________ _________________
Total: 36,671 1,168,782
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 570
Davis 307
Irvine 130
Los Angeles 265
Riverside 48
San Diego 419
San Francisco 629
Santa Barbara 23
Santa Cruz 17
Lawrence Berkeley 26
Lawrence Livermore 4
Los Alamos 0
MELWEB 0
Searchlight 5,488
Other - UC 28,532
Other-Network UC 213
_____
36,671
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,275
Davis 5,596
Irvine 1,130
Los Angeles 2,767
Riverside 485
San Diego 2,937
San Francisco 8,639
Santa Barbara 222
Santa Cruz 273
Lawrence Berkeley 739
Lawrence Livermore 56
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 1,140,177
Other-Network UC 2,486
_____
1,168,782
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 1.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.2
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:51
Average session length (minutes:seconds) 16:56
Longest session recorded (minutes:seconds) 300:47
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 584.5
Retrievals per search - standard deviation 10487
Percent of searches completed with 0 results 33.5%
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 36,671 14.0%
PRESENT 207,107 79.3%
INIT or CLOSE 17,268 6.6%
OTHER 76 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 2,889 5.8% 1,044 36.1% 4 2522.2 38285.3
PERSONAL AUTHOR 12,764 25.5% 3,514 27.5% 7 90.2 717.6
TITLE WORD 4,538 9.1% 1,653 36.4% 3 282.3 3707.2
SUBSET 35 0.1% 12 34.3% 51 2550.4 6721.1
SUBJECT WORD 30 0.1% 16 53.3% 30 60.9 94.9
SUBJECT 543 1.1% 345 63.5% 29 584.0 3116.7
EXACT SUBJECT 1,348 2.7% 341 25.3% 33 417.7 2263.2
MAJOR SUBJECT 19 0.0% 5 26.3% 39 758.5 2432.0
EXACT MAJOR SUBJ 59 0.1% 5 8.5% 78 1101.8 2654.2
EXACT TITLE 438 0.9% 191 43.6% 1 29.0 277.8
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 423 0.8% 81 19.1% 415 1668.6 3078.6
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 20,863 41.7% 7,734 37.1% 17 1109.6 9824.0
DATE 961 1.9% 231 24.0% 6 159.0 1248.7
LANGUAGE 2,185 4.4% 648 29.7% 21 310.5 1776.5
UNIQUE ID 30 0.1% 13 43.3% 1 1.0 0.0
ADDED 14 0.0% 13 92.9% 10 10.0 0.0
PUB TYPE 1,087 2.2% 204 18.8% 24 227.4 1089.1
AUTHOR AFFIL. 338 0.7% 165 48.8% 10 71.5 480.5
CHEMICAL NAME 3 0.0% 1 33.3% 10 10.0 2.8
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 1,331 2.7% 536 40.3% 17 496.8 2222.6
AGE 20 0.0% 0 0.0% 42 221.3 685.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 34 0.1% 8 23.5% 32 230.0 762.5
XXS 10 0.0% 3 30.0% 219 461.7 557.8
XMXS 11 0.0% 11 100% 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 14 0.0% 13 92.9% 7 7.0 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 9,661 26.3% 3,250 33.6% 6 210.1 1591.1
Single 27,010 73.7% 9,047 33.5% 15 1118.2 14934.5
PRESENT commands, by type:
MARC 30.4%
OPAC 24.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS