MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/01/01 through 09/07/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 31,359 1,706,292
MED90 5,946 150,807
MED85 4,489 54,179
MED80 3,849 30,027
MED75 3,641 29,071
MED66 3,742 30,093
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,290 42,265
2-4 a.m. 990 35,775
4-6 a.m. 270 20,287
6-8 a.m. 897 19,936
8-10 a.m. 3,841 142,904
10-12 a.m. 8,696 327,378
12-2 p.m. 9,777 377,026
2-4 p.m. 11,496 404,873
4-6 p.m. 8,457 319,164
6-8 p.m. 3,339 150,805
8-10 p.m. 2,297 79,950
10-12 p.m. 1,676 80,106
__________ _____________ _________________
Total: 53,026 2,000,469
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 340
Davis 658
Irvine 141
Los Angeles 794
Riverside 22
San Diego 437
San Francisco 1,052
Santa Barbara 6
Santa Cruz 13
Lawrence Berkeley 35
Lawrence Livermore 16
Los Alamos 0
MELWEB 0
Searchlight 3,157
Other - UC 46,214
Other-Network UC 141
_____
53,026
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,782
Davis 5,037
Irvine 96,044
Los Angeles 3,835
Riverside 122
San Diego 3,071
San Francisco 9,704
Santa Barbara 41
Santa Cruz 58
Lawrence Berkeley 660
Lawrence Livermore 321
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 1,877,994
Other-Network UC 800
_____
2,000,469
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 2.5
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) 21:40
Average session length (minutes:seconds) 20:33
Longest session recorded (minutes:seconds) 239:35
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 376.2
Retrievals per search - standard deviation 5429.4
Percent of searches completed with 0 results 33.4%
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 53,026 10.6%
PRESENT 424,660 85.0%
INIT or CLOSE 22,028 4.4%
OTHER 115 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 3,890 5.1% 1,670 42.9% 4 982.3 5417.0
PERSONAL AUTHOR 18,758 24.7% 5,782 30.8% 6 84.0 705.5
TITLE WORD 6,775 8.9% 2,761 40.8% 2 185.2 1909.6
SUBSET 92 0.1% 20 21.7% 17 232.9 663.6
SUBJECT WORD 144 0.2% 60 41.7% 7 912.7 4133.6
SUBJECT 1,453 1.9% 656 45.1% 16 1818.9 11337.2
EXACT SUBJECT 3,258 4.3% 806 24.7% 23 446.3 2835.3
MAJOR SUBJECT 109 0.1% 35 32.1% 10 328.6 1444.7
EXACT MAJOR SUBJ 251 0.3% 75 29.9% 19 331.7 961.9
EXACT TITLE 421 0.6% 269 63.9% 1 28.5 169.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 647 0.9% 185 28.6% 329 1775.9 3410.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 6 0.0% 2 33.3% 91 76.3 54.9
KEYWORD 28,821 38.0% 9,858 34.2% 15 718.5 8481.9
DATE 1,591 2.1% 492 30.9% 4 292.3 3454.5
LANGUAGE 3,699 4.9% 967 26.1% 21 331.7 1752.0
UNIQUE ID 185 0.2% 89 48.1% 1 1.1 0.9
ADDED 1,150 1.5% 573 49.8% 5 15.8 33.8
PUB TYPE 1,519 2.0% 237 15.6% 23 227.7 1046.7
AUTHOR AFFIL. 478 0.6% 188 39.3% 10 27.7 75.9
CHEMICAL NAME 1 0.0% 1 100% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 1,982 2.6% 643 32.4% 17 450.2 2401.0
AGE 239 0.3% 41 17.2% 10 52.8 277.9
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 66 0.1% 21 31.8% 60 291.6 503.3
XXS 197 0.3% 83 42.1% 4 16.0 40.7
XMXS 64 0.1% 33 51.6% 5 158.2 603.9
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 10 0.0% 8 80.0% 5 4.5 2.1
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 15,506 29.2% 5,345 34.5% 6 207.2 1831.0
Single 37,520 70.8% 12,389 33.0% 15 710.0 7786.0
PRESENT commands, by type:
MARC 34.6%
OPAC 31.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS