MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 03/01/01 through 03/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 206,891 11,373,137
MED90 44,492 819,405
MED85 34,296 303,396
MED80 30,535 164,996
MED75 28,845 122,844
MED66 29,334 138,085
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 9,901 407,482
2-4 a.m. 3,697 260,233
4-6 a.m. 1,730 236,928
6-8 a.m. 5,280 247,191
8-10 a.m. 27,136 915,070
10-12 a.m. 61,632 1,981,218
12-2 p.m. 65,006 2,071,883
2-4 p.m. 73,389 2,392,240
4-6 p.m. 60,002 2,042,676
6-8 p.m. 30,629 1,082,849
8-10 p.m. 22,199 743,992
10-12 p.m. 13,792 540,101
__________ _____________ _________________
Total: 374,393 12,921,863
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,678
Davis 3,368
Irvine 363
Los Angeles 2,537
Riverside 80
San Diego 2,939
San Francisco 4,870
Santa Barbara 118
Santa Cruz 55
Lawrence Berkeley 182
Lawrence Livermore 44
Los Alamos 57
MELWEB 298,978
Searchlight 55,909
Other - UC 486
Other-Network UC 2,729
_____
374,393
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 14,023
Davis 34,266
Irvine 3,914
Los Angeles 23,419
Riverside 690
San Diego 22,394
San Francisco 46,327
Santa Barbara 602
Santa Cruz 927
Lawrence Berkeley 2,662
Lawrence Livermore 228
Los Alamos 3,958
MELWEB 12,032,288
Searchlight 692,008
Other - UC 3,680
Other-Network UC 40,477
_____
12,921,863
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 3.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:00
Average session length (minutes:seconds) 17:57
Longest session recorded (minutes:seconds) 279:51
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 395.1
Retrievals per search - standard deviation 5065.4
Percent of searches completed with 0 results 35.8%
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 374,393 13.2%
PRESENT 2,296,275 80.9%
INIT or CLOSE 165,974 5.8%
OTHER 2,436 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 24,477 4.7% 10,287 42.0% 4 845.8 4018.8
PERSONAL AUTHOR 107838 20.6% 32,617 30.2% 8 92.4 951.3
TITLE WORD 41,350 7.9% 16,926 40.9% 3 175.6 1950.8
SUBSET 999 0.2% 273 27.3% 21 407.0 2240.0
SUBJECT WORD 769 0.1% 425 55.3% 9 792.0 3717.1
SUBJECT 9,810 1.9% 5,321 54.2% 17 650.6 4698.6
EXACT SUBJECT 20,626 3.9% 5,954 28.9% 29 549.0 3866.1
MAJOR SUBJECT 642 0.1% 305 47.5% 23 459.7 2413.3
EXACT MAJOR SUBJ 1,951 0.4% 516 26.4% 22 252.9 847.5
EXACT TITLE 3,373 0.6% 2,074 61.5% 1 50.3 369.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,930 0.9% 1,669 33.9% 358 1766.9 3476.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 112 0.0% 36 32.1% 35 77.0 116.6
KEYWORD 226751 43.3% 84,608 37.3% 17 802.9 7907.6
DATE 8,551 1.6% 2,676 31.3% 6 147.4 1474.0
LANGUAGE 27,823 5.3% 8,483 30.5% 25 434.2 3377.6
UNIQUE ID 781 0.1% 192 24.6% 1 1.1 0.6
ADDED 4,960 0.9% 4,008 80.8% 13 98.0 301.9
PUB TYPE 13,139 2.5% 3,675 28.0% 20 174.1 1421.6
AUTHOR AFFIL. 3,138 0.6% 1,359 43.3% 10 47.1 319.8
CHEMICAL NAME 60 0.0% 53 88.3% 20 52.0 66.1
EXACT CHEMICAL 3 0.0% 3 100% 0 0.0 0.0
AT 18,822 3.6% 6,221 33.1% 22 796.0 7493.9
AGE 856 0.2% 230 26.9% 25 264.4 1667.6
ISN 7 0.0% 5 71.4% 1 1.0 0.0
ARTICLE 374 0.1% 114 30.5% 50 642.9 2779.6
XXS 765 0.1% 437 57.1% 16 1556.9 14502.9
XMXS 251 0.0% 147 58.6% 33 439.6 2164.1
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 186 0.0% 151 81.2% 11 643.9 3498.1
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 102,052 27.3% 38,531 37.8% 8 297.7 3718.6
Single 272,341 72.7% 95,472 35.1% 16 729.5 7008.1
PRESENT commands, by type:
MARC 27.3%
OPAC 33.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS