MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/01/00 through 07/31/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 160,560 7,951,307
MED90 36,119 690,371
MED85 26,129 251,462
MED80 22,493 151,002
MED75 20,681 128,038
MED66 21,086 102,314
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,888 206,193
2-4 a.m. 1,958 62,478
4-6 a.m. 853 41,282
6-8 a.m. 4,059 121,612
8-10 a.m. 22,626 772,533
10-12 a.m. 50,479 1,648,148
12-2 p.m. 50,066 1,636,170
2-4 p.m. 60,645 1,925,042
4-6 p.m. 48,268 1,518,425
6-8 p.m. 22,783 688,958
8-10 p.m. 10,786 406,279
10-12 p.m. 6,657 247,374
__________ _____________ _________________
Total: 287,068 9,274,494
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,879
Davis 4,537
Irvine 671
Los Angeles 2,342
Riverside 121
San Diego 4,183
San Francisco 5,321
Santa Barbara 224
Santa Cruz 186
Lawrence Berkeley 243
Lawrence Livermore 258
Los Alamos 0
MELWEB 241,537
Searchlight 23,272
Other - UC 148
Other-Network UC 2,146
_____
287,068
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 17,632
Davis 53,194
Irvine 18,534
Los Angeles 19,189
Riverside 660
San Diego 27,780
San Francisco 53,260
Santa Barbara 1,997
Santa Cruz 2,480
Lawrence Berkeley 2,373
Lawrence Livermore 4,214
Los Alamos 0
MELWEB 8,853,419
Searchlight 196,279
Other - UC 584
Other-Network UC 22,899
_____
9,274,494
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 3.3
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 1.0
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:14
Average session length (minutes:seconds) 18:48
Longest session recorded (minutes:seconds) 296:32
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 421.3
Retrievals per search - standard deviation 4683.3
Percent of searches completed with 0 results 32.9%
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 287,068 13.5%
PRESENT 1,709,157 80.5%
INIT or CLOSE 124,571 5.9%
OTHER 2,095 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 18,591 4.5% 7,183 38.6% 4 956.1 8460.9
PERSONAL AUTHOR 91,769 22.4% 25,606 27.9% 7 82.2 899.5
TITLE WORD 33,400 8.1% 12,574 37.6% 3 155.7 2354.6
SUBSET 653 0.2% 170 26.0% 31 183.0 564.4
SUBJECT WORD 937 0.2% 435 46.4% 9 992.2 7733.1
SUBJECT 8,146 2.0% 4,210 51.7% 16 692.6 3799.4
EXACT SUBJECT 16,606 4.0% 4,502 27.1% 28 504.2 3666.0
MAJOR SUBJECT 706 0.2% 305 43.2% 10 286.3 1618.1
EXACT MAJOR SUBJ 1,478 0.4% 313 21.2% 18 457.2 4550.9
EXACT TITLE 2,838 0.7% 1,637 57.7% 1 18.2 243.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 5,636 1.4% 2,133 37.8% 132 1291.3 3009.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 117 0.0% 67 57.3% 40 765.9 1328.4
KEYWORD 162052 39.5% 55,194 34.1% 17 869.0 6939.5
DATE 8,013 2.0% 1,835 22.9% 6 154.0 1513.8
LANGUAGE 22,135 5.4% 6,549 29.6% 22 348.5 2987.5
UNIQUE ID 1,352 0.3% 530 39.2% 1 1.0 0.2
ADDED 5,740 1.4% 3,285 57.2% 4 18.4 159.7
PUB TYPE 10,153 2.5% 2,662 26.2% 22 135.0 632.7
AUTHOR AFFIL. 2,610 0.6% 1,053 40.3% 10 70.8 655.0
CHEMICAL NAME 201 0.0% 160 79.6% 8 256.6 1312.9
EXACT CHEMICAL 12 0.0% 9 75.0% 8 73.7 119.0
AT 14,814 3.6% 5,060 34.2% 18 503.2 3289.8
AGE 778 0.2% 214 27.5% 25 187.6 661.7
ISN 4 0.0% 4 100% 0 0.0 0.0
ARTICLE 343 0.1% 117 34.1% 53 447.9 3129.4
XXS 656 0.2% 252 38.4% 11 444.0 4478.8
XMXS 334 0.1% 127 38.0% 13 513.3 4587.3
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 48 0.0% 34 70.8% 40 1208.1 3705.8
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 83,298 29.0% 28,677 34.4% 6 234.0 2579.6
Single 203,770 71.0% 65,905 32.3% 15 784.6 6539.6
PRESENT commands, by type:
MARC 33.6%
OPAC 29.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS