MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 05/01/00 through 05/31/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 168,157 8,072,783
MED90 38,443 660,518
MED85 28,596 250,833
MED80 25,166 124,004
MED75 23,215 89,059
MED66 23,570 103,249
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,489 184,198
2-4 a.m. 4,272 120,728
4-6 a.m. 1,233 51,904
6-8 a.m. 4,180 116,410
8-10 a.m. 20,356 657,945
10-12 a.m. 50,119 1,552,112
12-2 p.m. 50,719 1,479,259
2-4 p.m. 60,529 1,712,686
4-6 p.m. 49,971 1,565,404
6-8 p.m. 26,387 839,328
8-10 p.m. 19,268 612,670
10-12 p.m. 12,624 407,802
__________ _____________ _________________
Total: 307,147 9,300,446
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,738
Davis 2,162
Irvine 444
Los Angeles 2,539
Riverside 146
San Diego 4,265
San Francisco 4,185
Santa Barbara 94
Santa Cruz 188
Lawrence Berkeley 178
Lawrence Livermore 91
Los Alamos 4
MELWEB 258,947
Searchlight 29,283
Other - UC 413
Other-Network UC 2,470
_____
307,147
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 23,648
Davis 20,105
Irvine 4,611
Los Angeles 28,101
Riverside 1,007
San Diego 40,436
San Francisco 43,450
Santa Barbara 510
Santa Cruz 1,210
Lawrence Berkeley 1,572
Lawrence Livermore 1,446
Los Alamos 204
MELWEB 8,957,286
Searchlight 150,119
Other - UC 2,749
Other-Network UC 23,992
_____
9,300,446
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.1
Standard deviation in seconds 3.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.6
Standard deviation in seconds 1.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:50
Average session length (minutes:seconds) 17:18
Longest session recorded (minutes:seconds) 287:37
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 451.1
Retrievals per search - standard deviation 6281.1
Percent of searches completed with 0 results 34.8%
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 307,147 14.2%
PRESENT 1,719,413 79.3%
INIT or CLOSE 138,545 6.4%
OTHER 2,879 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 17,203 4.0% 6,939 40.3% 4 724.9 4409.7
PERSONAL AUTHOR 84,831 19.7% 23,900 28.2% 7 84.2 705.9
TITLE WORD 29,752 6.9% 11,491 38.6% 3 149.9 1414.7
SUBSET 717 0.2% 160 22.3% 15 194.2 1045.6
SUBJECT WORD 1,416 0.3% 718 50.7% 10 1417.8 7994.6
SUBJECT 9,857 2.3% 5,352 54.3% 20 735.2 5815.4
EXACT SUBJECT 17,094 4.0% 4,178 24.4% 32 477.7 3175.3
MAJOR SUBJECT 516 0.1% 209 40.5% 18 275.1 1454.5
EXACT MAJOR SUBJ 1,400 0.3% 214 15.3% 25 320.2 1630.6
EXACT TITLE 2,735 0.6% 1,597 58.4% 1 8.8 84.9
TREE NUMBER 2 0.0% 0 0.0% 1,991 1991.0 1503.3
EXACT JOURNAL 4,809 1.1% 1,772 36.8% 247 1392.0 3057.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 19 0.0% 9 47.4% 141 157.3 163.2
KEYWORD 189189 43.9% 69,062 36.5% 17 947.0 9752.5
DATE 7,222 1.7% 1,650 22.8% 6 119.9 981.2
LANGUAGE 23,391 5.4% 6,188 26.5% 28 450.3 4067.8
UNIQUE ID 965 0.2% 262 27.1% 1 9.8 108.9
ADDED 4,478 1.0% 2,529 56.5% 6 17.8 37.9
PUB TYPE 9,696 2.3% 2,311 23.8% 23 162.3 1372.0
AUTHOR AFFIL. 2,867 0.7% 1,299 45.3% 8 92.1 915.7
CHEMICAL NAME 41 0.0% 19 46.3% 3 67.5 231.3
EXACT CHEMICAL 43 0.0% 38 88.4% 106 103.6 104.4
AT 19,964 4.6% 6,190 31.0% 24 528.8 3715.7
AGE 808 0.2% 181 22.4% 27 185.0 786.2
ISN 3 0.0% 3 100% 0 0.0 0.0
ARTICLE 645 0.1% 244 37.8% 30 432.1 2054.1
XXS 527 0.1% 250 47.4% 14 2245.3 20293.2
XMXS 257 0.1% 82 31.9% 11 76.3 334.0
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 74 0.0% 50 67.6% 17 1203.4 4148.3
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 81,700 26.6% 27,747 34.0% 8 272.3 2921.5
Single 225,447 73.4% 79,143 35.1% 16 846.5 8908.5
PRESENT commands, by type:
MARC 33.4%
OPAC 31.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS