MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/24/01 through 11/30/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 31,864 1,654,559
MED90 7,323 95,878
MED85 5,967 35,558
MED80 5,587 21,415
MED75 5,294 12,790
MED66 5,409 16,785
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,261 30,887
2-4 a.m. 308 2,003
4-6 a.m. 205 5,827
6-8 a.m. 623 15,697
8-10 a.m. 4,364 140,474
10-12 a.m. 9,191 281,487
12-2 p.m. 10,372 317,023
2-4 p.m. 12,149 402,733
4-6 p.m. 10,850 310,906
6-8 p.m. 5,522 144,362
8-10 p.m. 3,778 102,570
10-12 p.m. 2,821 83,016
__________ _____________ _________________
Total: 61,444 1,836,985
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 316
Davis 383
Irvine 65
Los Angeles 638
Riverside 63
San Diego 393
San Francisco 686
Santa Barbara 20
Santa Cruz 23
Lawrence Berkeley 44
Lawrence Livermore 18
Los Alamos 0
MELWEB 0
Searchlight 14,413
Other - UC 43,946
Other-Network UC 436
_____
61,444
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,744
Davis 3,007
Irvine 635
Los Angeles 8,846
Riverside 1,052
San Diego 3,197
San Francisco 8,701
Santa Barbara 56
Santa Cruz 172
Lawrence Berkeley 1,330
Lawrence Livermore 141
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 1,802,054
Other-Network UC 4,050
_____
1,836,985
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 2.3
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 14:57
Average session length (minutes:seconds) 14:05
Longest session recorded (minutes:seconds) 194:29
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 399.3
Retrievals per search - standard deviation 4012.7
Percent of searches completed with 0 results 37.2%
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 61,444 15.0%
PRESENT 317,880 77.4%
INIT or CLOSE 31,377 7.6%
OTHER 175 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 3,522 4.3% 1,340 38.0% 5 1138.9 4627.4
PERSONAL AUTHOR 16,420 20.2% 5,041 30.7% 7 89.3 728.0
TITLE WORD 6,420 7.9% 2,481 38.6% 3 141.6 1675.0
SUBSET 68 0.1% 18 26.5% 84 701.7 1900.2
SUBJECT WORD 117 0.1% 71 60.7% 30 3536.8 11760.2
SUBJECT 1,231 1.5% 727 59.1% 33 1235.5 4631.7
EXACT SUBJECT 2,305 2.8% 686 29.8% 37 762.1 4773.3
MAJOR SUBJECT 32 0.0% 15 46.9% 15 1570.2 3061.4
EXACT MAJOR SUBJ 347 0.4% 164 47.3% 51 362.2 669.3
EXACT TITLE 609 0.7% 339 55.7% 1 25.0 219.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 819 1.0% 222 27.1% 594 2194.7 3905.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 12 0.0% 12 100% 0 0.0 0.0
KEYWORD 39,430 48.6% 15,525 39.4% 16 758.3 6043.3
DATE 1,374 1.7% 337 24.5% 6 162.4 1353.3
LANGUAGE 3,238 4.0% 916 28.3% 28 827.3 6484.3
UNIQUE ID 76 0.1% 49 64.5% 1 1.0 0.0
ADDED 15 0.0% 0 0.0% 19 126.5 423.1
PUB TYPE 1,469 1.8% 317 21.6% 26 230.8 897.5
AUTHOR AFFIL. 537 0.7% 271 50.5% 11 96.4 828.7
CHEMICAL NAME 4 0.0% 3 75.0% 18 18.0 0.0
EXACT CHEMICAL 8 0.0% 2 25.0% 19 719.5 1241.1
AT 2,860 3.5% 801 28.0% 19 584.7 3051.9
AGE 77 0.1% 9 11.7% 24 151.2 439.2
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 100 0.1% 49 49.0% 25 259.4 891.0
XXS 62 0.1% 10 16.1% 23 1240.5 8624.2
XMXS 17 0.0% 12 70.6% 16 261.2 541.8
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 40 0.0% 37 92.5% 2 1.7 0.6
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 14,107 23.0% 4,847 34.4% 7 382.9 3806.3
Single 47,337 77.0% 18,020 38.1% 15 715.9 5380.3
PRESENT commands, by type:
MARC 28.8%
OPAC 25.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS