MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/30/00 through 01/05/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 30,474 1,510,817
MED90 5,979 112,150
MED85 4,376 46,713
MED80 3,659 25,382
MED75 3,165 15,545
MED66 3,206 18,008
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,597 24,752
2-4 a.m. 533 8,904
4-6 a.m. 196 2,718
6-8 a.m. 751 15,448
8-10 a.m. 4,138 134,370
10-12 a.m. 8,996 289,177
12-2 p.m. 9,288 323,108
2-4 p.m. 10,936 367,334
4-6 p.m. 8,503 298,684
6-8 p.m. 3,092 122,724
8-10 p.m. 1,671 83,429
10-12 p.m. 1,158 57,967
__________ _____________ _________________
Total: 50,859 1,728,615
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 272
Davis 1,113
Irvine 216
Los Angeles 661
Riverside 5
San Diego 416
San Francisco 1,008
Santa Barbara 3
Santa Cruz 4
Lawrence Berkeley 27
Lawrence Livermore 15
Los Alamos 0
MELWEB 41,715
Searchlight 4,697
Other - UC 63
Other-Network UC 644
_____
50,859
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 16,092
Davis 8,383
Irvine 3,263
Los Angeles 7,571
Riverside 76
San Diego 3,498
San Francisco 9,172
Santa Barbara 49
Santa Cruz 148
Lawrence Berkeley 105
Lawrence Livermore 56
Los Alamos 0
MELWEB 1,665,117
Searchlight 7,665
Other - UC 374
Other-Network UC 7,046
_____
1,728,615
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 2.5
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) 21:32
Average session length (minutes:seconds) 19:59
Longest session recorded (minutes:seconds) 191:06
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 307.0
Retrievals per search - standard deviation 3244.8
Percent of searches completed with 0 results 32.1%
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 50,859 12.9%
PRESENT 323,973 82.1%
INIT or CLOSE 19,437 4.9%
OTHER 377 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 3,812 5.3% 1,264 33.2% 4 805.4 4371.2
PERSONAL AUTHOR 17,365 24.0% 4,592 26.4% 7 80.7 1337.6
TITLE WORD 6,149 8.5% 2,065 33.6% 2 172.1 2109.7
SUBSET 148 0.2% 42 28.4% 19 236.7 688.9
SUBJECT WORD 74 0.1% 19 25.7% 24 4792.0 19603.4
SUBJECT 1,337 1.9% 791 59.2% 14 555.3 3117.4
EXACT SUBJECT 2,967 4.1% 866 29.2% 27 466.9 2666.8
MAJOR SUBJECT 124 0.2% 45 36.3% 18 263.5 771.2
EXACT MAJOR SUBJ 326 0.5% 106 32.5% 18 258.9 1158.2
EXACT TITLE 369 0.5% 224 60.7% 1 46.5 229.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 703 1.0% 177 25.2% 450 1589.9 3204.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 5 0.0% 1 20.0% 55 506.3 936.4
KEYWORD 27,581 38.2% 9,541 34.6% 17 570.9 4830.9
DATE 1,564 2.2% 359 23.0% 6 219.0 4124.7
LANGUAGE 3,828 5.3% 1,119 29.2% 22 308.8 1701.6
UNIQUE ID 225 0.3% 40 17.8% 1 1.1 0.9
ADDED 967 1.3% 967 100% 0 0.0 0.0
PUB TYPE 1,676 2.3% 465 27.7% 21 204.3 856.5
AUTHOR AFFIL. 419 0.6% 196 46.8% 9 147.6 940.5
CHEMICAL NAME 15 0.0% 13 86.7% 16 15.5 20.5
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,100 2.9% 706 33.6% 21 551.5 2786.5
AGE 151 0.2% 33 21.9% 11 142.2 486.7
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 58 0.1% 16 27.6% 43 1048.7 3277.5
XXS 125 0.2% 65 52.0% 14 290.6 1098.3
XMXS 106 0.1% 30 28.3% 29 454.5 2567.9
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 9 0.0% 6 66.7% 212 168.7 75.1
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 14,331 28.2% 5,186 36.2% 7 228.0 2130.1
Single 36,528 71.8% 11,157 30.5% 15 533.1 4399.6
PRESENT commands, by type:
MARC 33.6%
OPAC 29.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS